Hello to every one,
Can any one tell me how to calucualte section forces between Th12 and
L1 in spine model for Zero degree inlcination? My final goal is to
calculate the section forces in anybody spine model between Th12 and L1
for different positions.
with best regards.
Iqbal
Hi Iqbal
I think it will be best to use the FreePostureModel, this can be
controlled by the Mannequin.any file.
If you look at the following output
Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
aints.Reaction.Fout
You will get the reaction forces in the joint comming from the
external loads and the muscle contractions.
In the same manner you can also look at the other joints in the
lumbar region.
One more thing the FreepostureModel comes default, as a model with
no muscles, changing the include statement will from
#include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
oMuscles.any”
to
#include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
ny”
this will let you get the reaction forces.
Please do not hesitate to ask again if you have further questions.
Best regards
Søren, AnyBody Support
—In anyscript@yahoogroups.com, “javed377” <javed377@…> wrote:
>
>
> Hello to every one,
>
> Can any one tell me how to calucualte section forces between Th12
and
> L1 in spine model for Zero degree inlcination? My final goal is to
> calculate the section forces in anybody spine model between Th12
and L1
> for different positions.
>
> with best regards.
>
> Iqbal
>
Hi Soren,
Thank you very much for your guidance.
Now i have checked the rection force which are about 1400N with
FreePosture model. But when i changed the posture like in standing
model we have,i mean i changed the values in Mannequin.any of
FreePosture to values as we have in Mannequin.any of Standing model.
I got the force of 500N.
Can you tell me what are the reasons may be? as i think with changing
the posture it should not be so big difference because we have same
loading conditions etc.
Thanks in advance.
and have a nice week end.
Iqbal
— In anyscript@yahoogroups.com, “AnyBody Support” <support@…> wrote:
>
> Hi Iqbal
>
> I think it will be best to use the FreePostureModel, this can be
> controlled by the Mannequin.any file.
>
> If you look at the following output
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> aints.Reaction.Fout
>
> You will get the reaction forces in the joint comming from the
> external loads and the muscle contractions.
>
> In the same manner you can also look at the other joints in the
> lumbar region.
>
> One more thing the FreepostureModel comes default, as a model with
> no muscles, changing the include statement will from
>
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> oMuscles.any”
>
> to
>
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> ny”
>
>
> this will let you get the reaction forces.
>
>
> Please do not hesitate to ask again if you have further questions.
>
> Best regards
> Søren, AnyBody Support
>
> —In anyscript@yahoogroups.com, “javed377” <javed377@> wrote:
> >
> >
> > Hello to every one,
> >
> > Can any one tell me how to calucualte section forces between Th12
> and
> > L1 in spine model for Zero degree inlcination? My final goal is to
> > calculate the section forces in anybody spine model between Th12
> and L1
> > for different positions.
> >
> > with best regards.
> >
> > Iqbal
> >
>
Hi Iqbal
I think this difference may originate from the differences in the posture.
If the angle of the pelvis is different in the two models it will have a big
impact on the model, if the pelvis is tilted more backward in the standing
model it may have the result you list. Also the posture of the arms will
have an influence on the result, so in order to compare the results these
should also be the same.
In the standing model there might also be a load applied in the
Mannequin.any file, please check the last section of the mannequin.any for
this, it may also have an impact in the results.
I hope this helps you move on, otherwise please ask again.
Have a nice weekend
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of javed377
Sent: 26 October 2007 12:10
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Section Forces in Spine
Hi Soren,
Thank you very much for your guidance.
Now i have checked the rection force which are about 1400N with
FreePosture model. But when i changed the posture like in standing
model we have,i mean i changed the values in Mannequin.any of
FreePosture to values as we have in Mannequin.any of Standing model.
I got the force of 500N.
Can you tell me what are the reasons may be? as i think with changing
the posture it should not be so big difference because we have same
loading conditions etc.
Thanks in advance.
and have a nice week end.
Iqbal
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@…> wrote:
>
> Hi Iqbal
>
> I think it will be best to use the FreePostureModel, this can be
> controlled by the Mannequin.any file.
>
> If you look at the following output
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> aints.Reaction.Fout
>
> You will get the reaction forces in the joint comming from the
> external loads and the muscle contractions.
>
> In the same manner you can also look at the other joints in the
> lumbar region.
>
> One more thing the FreepostureModel comes default, as a model with
> no muscles, changing the include statement will from
>
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> oMuscles.any”
>
> to
>
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> ny”
>
>
> this will let you get the reaction forces.
>
>
> Please do not hesitate to ask again if you have further questions.
>
> Best regards
> Søren, AnyBody Support
>
> —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“javed377” <javed377@> wrote:
> >
> >
> > Hello to every one,
> >
> > Can any one tell me how to calucualte section forces between Th12
> and
> > L1 in spine model for Zero degree inlcination? My final goal is to
> > calculate the section forces in anybody spine model between Th12
> and L1
> > for different positions.
> >
> > with best regards.
> >
> > Iqbal
> >
>
[Non-text portions of this message have been removed]
Hello Soren,
Thanks for your guidance.
Firslty As you told that posture have large effect on Reaction
foreces,i have check too.But i have checked with FreePosture model and
Standing Model,they have difference of about 100N with every thing
same in Mannequin.any file,even i changed the load equal to zero in
Standing Model.
Please let me know what the reasons may be.
Seconly, i want to calculate the Forces with the Flexion,Compression
and Lateral Flexion of Lumber Spine in standing position.Can you tell
me how to do it?
Thirdly,the same forces i want to calculate in sitting postion.Can you
tell me how to add a support(like Chair)in the Model.
What you suggest should i use FreePosture or Standing Model for the
above purposes?
With best regards.
Iqbal
— In anyscript@yahoogroups.com, “AnyBody Support” <support@…> wrote:
>
> Hi Iqbal
>
>
>
> I think this difference may originate from the differences in the
posture.
>
>
>
> If the angle of the pelvis is different in the two models it will
have a big
> impact on the model, if the pelvis is tilted more backward in the
standing
> model it may have the result you list. Also the posture of the arms will
> have an influence on the result, so in order to compare the results
these
> should also be the same.
>
>
>
> In the standing model there might also be a load applied in the
> Mannequin.any file, please check the last section of the
mannequin.any for
> this, it may also have an impact in the results.
>
>
>
> I hope this helps you move on, otherwise please ask again.
>
>
>
> Have a nice weekend
>
>
>
> Best regards
>
> Søren, AnyBody Support
>
>
>
> _____
>
> From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com]
On Behalf
> Of javed377
> Sent: 26 October 2007 12:10
> To: anyscript@yahoogroups.com
> Subject: [AnyScript] Re: Section Forces in Spine
>
>
>
>
> Hi Soren,
> Thank you very much for your guidance.
> Now i have checked the rection force which are about 1400N with
> FreePosture model. But when i changed the posture like in standing
> model we have,i mean i changed the values in Mannequin.any of
> FreePosture to values as we have in Mannequin.any of Standing model.
> I got the force of 500N.
> Can you tell me what are the reasons may be? as i think with changing
> the posture it should not be so big difference because we have same
> loading conditions etc.
>
> Thanks in advance.
> and have a nice week end.
>
> Iqbal
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “AnyBody Support” <support@> wrote:
> >
> > Hi Iqbal
> >
> > I think it will be best to use the FreePostureModel, this can be
> > controlled by the Mannequin.any file.
> >
> > If you look at the following output
> > Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > aints.Reaction.Fout
> >
> > You will get the reaction forces in the joint comming from the
> > external loads and the muscle contractions.
> >
> > In the same manner you can also look at the other joints in the
> > lumbar region.
> >
> > One more thing the FreepostureModel comes default, as a model with
> > no muscles, changing the include statement will from
> >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > oMuscles.any”
> >
> > to
> >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > ny”
> >
> >
> > this will let you get the reaction forces.
> >
> >
> > Please do not hesitate to ask again if you have further questions.
> >
> > Best regards
> > Søren, AnyBody Support
> >
> > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “javed377” <javed377@> wrote:
> > >
> > >
> > > Hello to every one,
> > >
> > > Can any one tell me how to calucualte section forces between Th12
> > and
> > > L1 in spine model for Zero degree inlcination? My final goal is to
> > > calculate the section forces in anybody spine model between Th12
> > and L1
> > > for different positions.
> > >
> > > with best regards.
> > >
> > > Iqbal
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
Hi Iqbal
Even if the Mannequin.any are the same it is not certain that the
postures are the same, I will try to exaplin why:
The standing model is driven only partly by the settings in the
Mannequin.any file, the freeposture model is driven 100% by the
mannequin.any file. In the standing model there is as i recall it a
center of mass driver that ensures that the center of mass of the
entire model is placed above the ankles.
The angles in the Mannequin.any file is used at load time to set the
initial positions and for driving some of the dof in the model once
you run the kinematic analysis.
To calculate the forces for a standing positon in flexion i would
use the standing model and then drive the pelvisThorax angle to
obtain the wanted postures of the spine and read out the compression
forces as the values i mentioned in a previous answer.
If you want to the same for a seated person i would start using the
SeatedHuman model. This is a seated person with the proper boundary
conditions.
I hope this helps you move on otherwise please write again.
Best regards
Søren, AnyBody Support
— In anyscript@yahoogroups.com, “javed377” <javed377@…> wrote:
>
> Hello Soren,
>
> Thanks for your guidance.
> Firslty As you told that posture have large effect on Reaction
> foreces,i have check too.But i have checked with FreePosture model
and
> Standing Model,they have difference of about 100N with every thing
> same in Mannequin.any file,even i changed the load equal to zero in
> Standing Model.
> Please let me know what the reasons may be.
>
> Seconly, i want to calculate the Forces with the
Flexion,Compression
> and Lateral Flexion of Lumber Spine in standing position.Can you
tell
> me how to do it?
>
> Thirdly,the same forces i want to calculate in sitting postion.Can
you
> tell me how to add a support(like Chair)in the Model.
>
> What you suggest should i use FreePosture or Standing Model for the
> above purposes?
>
> With best regards.
>
> Iqbal
>
> — In anyscript@yahoogroups.com, “AnyBody Support” <support@>
wrote:
> >
> > Hi Iqbal
> >
> >
> >
> > I think this difference may originate from the differences in the
> posture.
> >
> >
> >
> > If the angle of the pelvis is different in the two models it will
> have a big
> > impact on the model, if the pelvis is tilted more backward in the
> standing
> > model it may have the result you list. Also the posture of the
arms will
> > have an influence on the result, so in order to compare the
results
> these
> > should also be the same.
> >
> >
> >
> > In the standing model there might also be a load applied in the
> > Mannequin.any file, please check the last section of the
> mannequin.any for
> > this, it may also have an impact in the results.
> >
> >
> >
> > I hope this helps you move on, otherwise please ask again.
> >
> >
> >
> > Have a nice weekend
> >
> >
> >
> > Best regards
> >
> > Søren, AnyBody Support
> >
> >
> >
> > _____
> >
> > From: anyscript@yahoogroups.com
[mailto:anyscript@yahoogroups.com]
> On Behalf
> > Of javed377
> > Sent: 26 October 2007 12:10
> > To: anyscript@yahoogroups.com
> > Subject: [AnyScript] Re: Section Forces in Spine
> >
> >
> >
> >
> > Hi Soren,
> > Thank you very much for your guidance.
> > Now i have checked the rection force which are about 1400N with
> > FreePosture model. But when i changed the posture like in
standing
> > model we have,i mean i changed the values in Mannequin.any of
> > FreePosture to values as we have in Mannequin.any of Standing
model.
> > I got the force of 500N.
> > Can you tell me what are the reasons may be? as i think with
changing
> > the posture it should not be so big difference because we have
same
> > loading conditions etc.
> >
> > Thanks in advance.
> > and have a nice week end.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “AnyBody Support” <support@> wrote:
> > >
> > > Hi Iqbal
> > >
> > > I think it will be best to use the FreePostureModel, this can
be
> > > controlled by the Mannequin.any file.
> > >
> > > If you look at the following output
> > >
Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > aints.Reaction.Fout
> > >
> > > You will get the reaction forces in the joint comming from the
> > > external loads and the muscle contractions.
> > >
> > > In the same manner you can also look at the other joints in
the
> > > lumbar region.
> > >
> > > One more thing the FreepostureModel comes default, as a model
with
> > > no muscles, changing the include statement will from
> > >
> > >
#include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > oMuscles.any”
> > >
> > > to
> > >
> > >
#include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > ny”
> > >
> > >
> > > this will let you get the reaction forces.
> > >
> > >
> > > Please do not hesitate to ask again if you have further
questions.
> > >
> > > Best regards
> > > Søren, AnyBody Support
> > >
> > > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “javed377” <javed377@> wrote:
> > > >
> > > >
> > > > Hello to every one,
> > > >
> > > > Can any one tell me how to calucualte section forces between
Th12
> > > and
> > > > L1 in spine model for Zero degree inlcination? My final goal
is to
> > > > calculate the section forces in anybody spine model between
Th12
> > > and L1
> > > > for different positions.
> > > >
> > > > with best regards.
> > > >
> > > > Iqbal
> > > >
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
Dear Soren,
Thanks for you cooperation.
1.To calculate the forces for a standing positon in flexion i have
used the standing model and then drove the pelvisThorax angle.But its
the angle between pelvis and Thorax and i need the flexion in Lumber
Spine.How i can relate the Flexion of Thoracic Spine with Lumber
Spine if i have pelvisThrox angel of -60 degree?I mean what is angle
for Lumber Spine if i have pelvisThrox angel of -60 degree.
2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
degree,firstly it there was flexion but when i run the InverseDynamic
Analysis it came back again in sitting position and the Forces were
same like i have in the Seated Model.
3.Can you tell me is there contact between Spine and Back of the cahir
in the SeatedModel and if there is contact then what is the
coefficient of friction?
With best regards.
Iqbal
— In anyscript@yahoogroups.com, “AnyBody Support” <support@…>
wrote:
>
> Hi Iqbal
>
> Even if the Mannequin.any are the same it is not certain that the
> postures are the same, I will try to exaplin why:
>
> The standing model is driven only partly by the settings in the
> Mannequin.any file, the freeposture model is driven 100% by the
> mannequin.any file. In the standing model there is as i recall it a
> center of mass driver that ensures that the center of mass of the
> entire model is placed above the ankles.
>
> The angles in the Mannequin.any file is used at load time to set the
> initial positions and for driving some of the dof in the model once
> you run the kinematic analysis.
>
> To calculate the forces for a standing positon in flexion i would
> use the standing model and then drive the pelvisThorax angle to
> obtain the wanted postures of the spine and read out the compression
> forces as the values i mentioned in a previous answer.
>
> If you want to the same for a seated person i would start using the
> SeatedHuman model. This is a seated person with the proper boundary
> conditions.
>
> I hope this helps you move on otherwise please write again.
>
> Best regards
> Søren, AnyBody Support
>
>
> — In anyscript@yahoogroups.com, “javed377” <javed377@> wrote:
> >
> > Hello Soren,
> >
> > Thanks for your guidance.
> > Firslty As you told that posture have large effect on Reaction
> > foreces,i have check too.But i have checked with FreePosture model
> and
> > Standing Model,they have difference of about 100N with every thing
> > same in Mannequin.any file,even i changed the load equal to zero in
> > Standing Model.
> > Please let me know what the reasons may be.
> >
> > Seconly, i want to calculate the Forces with the
> Flexion,Compression
> > and Lateral Flexion of Lumber Spine in standing position.Can you
> tell
> > me how to do it?
> >
> > Thirdly,the same forces i want to calculate in sitting postion.Can
> you
> > tell me how to add a support(like Chair)in the Model.
> >
> > What you suggest should i use FreePosture or Standing Model for the
> > above purposes?
> >
> > With best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogroups.com, “AnyBody Support” <support@>
> wrote:
> > >
> > > Hi Iqbal
> > >
> > >
> > >
> > > I think this difference may originate from the differences in the
> > posture.
> > >
> > >
> > >
> > > If the angle of the pelvis is different in the two models it will
> > have a big
> > > impact on the model, if the pelvis is tilted more backward in the
> > standing
> > > model it may have the result you list. Also the posture of the
> arms will
> > > have an influence on the result, so in order to compare the
> results
> > these
> > > should also be the same.
> > >
> > >
> > >
> > > In the standing model there might also be a load applied in the
> > > Mannequin.any file, please check the last section of the
> > mannequin.any for
> > > this, it may also have an impact in the results.
> > >
> > >
> > >
> > > I hope this helps you move on, otherwise please ask again.
> > >
> > >
> > >
> > > Have a nice weekend
> > >
> > >
> > >
> > > Best regards
> > >
> > > Søren, AnyBody Support
> > >
> > >
> > >
> > > _____
> > >
> > > From: anyscript@yahoogroups.com
> [mailto:anyscript@yahoogroups.com]
> > On Behalf
> > > Of javed377
> > > Sent: 26 October 2007 12:10
> > > To: anyscript@yahoogroups.com
> > > Subject: [AnyScript] Re: Section Forces in Spine
> > >
> > >
> > >
> > >
> > > Hi Soren,
> > > Thank you very much for your guidance.
> > > Now i have checked the rection force which are about 1400N with
> > > FreePosture model. But when i changed the posture like in
> standing
> > > model we have,i mean i changed the values in Mannequin.any of
> > > FreePosture to values as we have in Mannequin.any of Standing
> model.
> > > I got the force of 500N.
> > > Can you tell me what are the reasons may be? as i think with
> changing
> > > the posture it should not be so big difference because we have
> same
> > > loading conditions etc.
> > >
> > > Thanks in advance.
> > > and have a nice week end.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “AnyBody Support” <support@> wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > > I think it will be best to use the FreePostureModel, this can
> be
> > > > controlled by the Mannequin.any file.
> > > >
> > > > If you look at the following output
> > > >
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > aints.Reaction.Fout
> > > >
> > > > You will get the reaction forces in the joint comming from the
> > > > external loads and the muscle contractions.
> > > >
> > > > In the same manner you can also look at the other joints in
> the
> > > > lumbar region.
> > > >
> > > > One more thing the FreepostureModel comes default, as a model
> with
> > > > no muscles, changing the include statement will from
> > > >
> > > >
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > oMuscles.any”
> > > >
> > > > to
> > > >
> > > >
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > ny”
> > > >
> > > >
> > > > this will let you get the reaction forces.
> > > >
> > > >
> > > > Please do not hesitate to ask again if you have further
> questions.
> > > >
> > > > Best regards
> > > > Søren, AnyBody Support
> > > >
> > > > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “javed377” <javed377@> wrote:
> > > > >
> > > > >
> > > > > Hello to every one,
> > > > >
> > > > > Can any one tell me how to calucualte section forces between
> Th12
> > > > and
> > > > > L1 in spine model for Zero degree inlcination? My final goal
> is to
> > > > > calculate the section forces in anybody spine model between
> Th12
> > > > and L1
> > > > > for different positions.
> > > > >
> > > > > with best regards.
> > > > >
> > > > > Iqbal
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>
Dear Iqbal
Q1:
I am not sure i entirely understand the first question; i will try to
explain how it works.
In the spine model there are 6 spherical joints in the lumbar region.
Instead of having to driver each of these dof a “spine rhythm” has been
implemented this rhythm links the dof together so that the only remaining
dof left is the rotation between thorax and pelvis. These are the angles you
can specify in the mannequin file.
So in terms of flexion you can not specify more angles than the
PelvisThoraxExtension angle. If this is not suitable for your model you
will need to switch of the Spine rhythm in the
BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100% freedom of
the motion of the lumbar region, the drawback is of course that you need to
drive the three dof of each of the joints to make the model kinematical
determined.
Q2:
The values in the Mannequin.any file can be used for two things.
To calculate initialpositions at load time (this is what you saw)
For driving the model when running an analysis. Most models to not
use all the values in the Mannequin when the analysis is running. In the
case of the seatedhuman the chair a connection between the backrest and
thorax drives the flexion/extension of the spine not the Mannequin. It is
only the FreePosture models where all dof in the model are driven directly
by the mannequin values.
Q3:
Yes there is a contact the definition of this can be found in the file
Support.any, the friction coefficients can be found in the top of the
SeatedHuman.main.any file.
Please ask again if you have further questions
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of javed377
Sent: 02 November 2007 17:22
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Section Forces in Spine
Dear Soren,
Thanks for you cooperation.
1.To calculate the forces for a standing positon in flexion i have
used the standing model and then drove the pelvisThorax angle.But its
the angle between pelvis and Thorax and i need the flexion in Lumber
Spine.How i can relate the Flexion of Thoracic Spine with Lumber
Spine if i have pelvisThrox angel of -60 degree?I mean what is angle
for Lumber Spine if i have pelvisThrox angel of -60 degree.
2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
degree,firstly it there was flexion but when i run the InverseDynamic
Analysis it came back again in sitting position and the Forces were
same like i have in the Seated Model.
3.Can you tell me is there contact between Spine and Back of the cahir
in the SeatedModel and if there is contact then what is the
coefficient of friction?
With best regards.
Iqbal
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@…>
wrote:
>
> Hi Iqbal
>
> Even if the Mannequin.any are the same it is not certain that the
> postures are the same, I will try to exaplin why:
>
> The standing model is driven only partly by the settings in the
> Mannequin.any file, the freeposture model is driven 100% by the
> mannequin.any file. In the standing model there is as i recall it a
> center of mass driver that ensures that the center of mass of the
> entire model is placed above the ankles.
>
> The angles in the Mannequin.any file is used at load time to set the
> initial positions and for driving some of the dof in the model once
> you run the kinematic analysis.
>
> To calculate the forces for a standing positon in flexion i would
> use the standing model and then drive the pelvisThorax angle to
> obtain the wanted postures of the spine and read out the compression
> forces as the values i mentioned in a previous answer.
>
> If you want to the same for a seated person i would start using the
> SeatedHuman model. This is a seated person with the proper boundary
> conditions.
>
> I hope this helps you move on otherwise please write again.
>
> Best regards
> Søren, AnyBody Support
>
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“javed377” <javed377@> wrote:
> >
> > Hello Soren,
> >
> > Thanks for your guidance.
> > Firslty As you told that posture have large effect on Reaction
> > foreces,i have check too.But i have checked with FreePosture model
> and
> > Standing Model,they have difference of about 100N with every thing
> > same in Mannequin.any file,even i changed the load equal to zero in
> > Standing Model.
> > Please let me know what the reasons may be.
> >
> > Seconly, i want to calculate the Forces with the
> Flexion,Compression
> > and Lateral Flexion of Lumber Spine in standing position.Can you
> tell
> > me how to do it?
> >
> > Thirdly,the same forces i want to calculate in sitting postion.Can
> you
> > tell me how to add a support(like Chair)in the Model.
> >
> > What you suggest should i use FreePosture or Standing Model for the
> > above purposes?
> >
> > With best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@>
> wrote:
> > >
> > > Hi Iqbal
> > >
> > >
> > >
> > > I think this difference may originate from the differences in the
> > posture.
> > >
> > >
> > >
> > > If the angle of the pelvis is different in the two models it will
> > have a big
> > > impact on the model, if the pelvis is tilted more backward in the
> > standing
> > > model it may have the result you list. Also the posture of the
> arms will
> > > have an influence on the result, so in order to compare the
> results
> > these
> > > should also be the same.
> > >
> > >
> > >
> > > In the standing model there might also be a load applied in the
> > > Mannequin.any file, please check the last section of the
> > mannequin.any for
> > > this, it may also have an impact in the results.
> > >
> > >
> > >
> > > I hope this helps you move on, otherwise please ask again.
> > >
> > >
> > >
> > > Have a nice weekend
> > >
> > >
> > >
> > > Best regards
> > >
> > > Søren, AnyBody Support
> > >
> > >
> > >
> > > _____
> > >
> > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
> > On Behalf
> > > Of javed377
> > > Sent: 26 October 2007 12:10
> > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > > Subject: [AnyScript] Re: Section Forces in Spine
> > >
> > >
> > >
> > >
> > > Hi Soren,
> > > Thank you very much for your guidance.
> > > Now i have checked the rection force which are about 1400N with
> > > FreePosture model. But when i changed the posture like in
> standing
> > > model we have,i mean i changed the values in Mannequin.any of
> > > FreePosture to values as we have in Mannequin.any of Standing
> model.
> > > I got the force of 500N.
> > > Can you tell me what are the reasons may be? as i think with
> changing
> > > the posture it should not be so big difference because we have
> same
> > > loading conditions etc.
> > >
> > > Thanks in advance.
> > > and have a nice week end.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “AnyBody Support” <support@> wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > > I think it will be best to use the FreePostureModel, this can
> be
> > > > controlled by the Mannequin.any file.
> > > >
> > > > If you look at the following output
> > > >
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > aints.Reaction.Fout
> > > >
> > > > You will get the reaction forces in the joint comming from the
> > > > external loads and the muscle contractions.
> > > >
> > > > In the same manner you can also look at the other joints in
> the
> > > > lumbar region.
> > > >
> > > > One more thing the FreepostureModel comes default, as a model
> with
> > > > no muscles, changing the include statement will from
> > > >
> > > >
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > oMuscles.any”
> > > >
> > > > to
> > > >
> > > >
> #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > ny”
> > > >
> > > >
> > > > this will let you get the reaction forces.
> > > >
> > > >
> > > > Please do not hesitate to ask again if you have further
> questions.
> > > >
> > > > Best regards
> > > > Søren, AnyBody Support
> > > >
> > > > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “javed377” <javed377@> wrote:
> > > > >
> > > > >
> > > > > Hello to every one,
> > > > >
> > > > > Can any one tell me how to calucualte section forces between
> Th12
> > > > and
> > > > > L1 in spine model for Zero degree inlcination? My final goal
> is to
> > > > > calculate the section forces in anybody spine model between
> Th12
> > > > and L1
> > > > > for different positions.
> > > > >
> > > > > with best regards.
> > > > >
> > > > > Iqbal
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>
[Non-text portions of this message have been removed]
Dear Soren,
May be i am not able to ask you question well.
I mean if i have calculated the Section forces by setting PlevisThorax
angel=-60 degree then how i can know about final Rotational postion
(angle)of L1 segment or joint b/w L1 and Th12.
with best regards.
Iqbal
— In anyscript@yahoogroups.com, “AnyBody Support” <support@…> wrote:
>
> Dear Iqbal
>
>
>
> Q1:
>
> I am not sure i entirely understand the first question; i will try to
> explain how it works.
>
> In the spine model there are 6 spherical joints in the lumbar region.
> Instead of having to driver each of these dof a “spine rhythm” has been
> implemented this rhythm links the dof together so that the only
remaining
> dof left is the rotation between thorax and pelvis. These are the
angles you
> can specify in the mannequin file.
>
> So in terms of flexion you can not specify more angles than the
> PelvisThoraxExtension angle. If this is not suitable for your model you
> will need to switch of the Spine rhythm in the
> BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
freedom of
> the motion of the lumbar region, the drawback is of course that you
need to
> drive the three dof of each of the joints to make the model kinematical
> determined.
>
>
>
> Q2:
>
> The values in the Mannequin.any file can be used for two things.
>
> 1) To calculate initialpositions at load time (this is what
you saw)
>
> 2) For driving the model when running an analysis. Most models
to not
> use all the values in the Mannequin when the analysis is running.
In the
> case of the seatedhuman the chair a connection between the backrest and
> thorax drives the flexion/extension of the spine not the Mannequin.
It is
> only the FreePosture models where all dof in the model are driven
directly
> by the mannequin values.
>
>
>
> Q3:
>
> Yes there is a contact the definition of this can be found in the file
> Support.any, the friction coefficients can be found in the top of the
> SeatedHuman.main.any file.
>
>
>
> Please ask again if you have further questions
>
>
>
> Best regards
>
> Søren, AnyBody Support
>
>
>
>
>
>
>
> _____
>
> From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com]
On Behalf
> Of javed377
> Sent: 02 November 2007 17:22
> To: anyscript@yahoogroups.com
> Subject: [AnyScript] Re: Section Forces in Spine
>
>
>
> Dear Soren,
> Thanks for you cooperation.
> 1.To calculate the forces for a standing positon in flexion i have
> used the standing model and then drove the pelvisThorax angle.But its
> the angle between pelvis and Thorax and i need the flexion in Lumber
> Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> Spine if i have pelvisThrox angel of -60 degree?a
>
> 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> degree,firstly it there was flexion but when i run the InverseDynamic
> Analysis it came back again in sitting position and the Forces were
> same like i have in the Seated Model.
>
> 3.Can you tell me is there contact between Spine and Back of the cahir
> in the SeatedModel and if there is contact then what is the
> coefficient of friction?
>
> With best regards.
>
> Iqbal
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “AnyBody Support” <support@>
>
> wrote:
> >
> > Hi Iqbal
> >
> > Even if the Mannequin.any are the same it is not certain that the
> > postures are the same, I will try to exaplin why:
> >
> > The standing model is driven only partly by the settings in the
> > Mannequin.any file, the freeposture model is driven 100% by the
> > mannequin.any file. In the standing model there is as i recall it a
> > center of mass driver that ensures that the center of mass of the
> > entire model is placed above the ankles.
> >
> > The angles in the Mannequin.any file is used at load time to set the
> > initial positions and for driving some of the dof in the model once
> > you run the kinematic analysis.
> >
> > To calculate the forces for a standing positon in flexion i would
> > use the standing model and then drive the pelvisThorax angle to
> > obtain the wanted postures of the spine and read out the compression
> > forces as the values i mentioned in a previous answer.
> >
> > If you want to the same for a seated person i would start using the
> > SeatedHuman model. This is a seated person with the proper boundary
> > conditions.
> >
> > I hope this helps you move on otherwise please write again.
> >
> > Best regards
> > Søren, AnyBody Support
> >
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> “javed377” <javed377@> wrote:
> > >
> > > Hello Soren,
> > >
> > > Thanks for your guidance.
> > > Firslty As you told that posture have large effect on Reaction
> > > foreces,i have check too.But i have checked with FreePosture model
> > and
> > > Standing Model,they have difference of about 100N with every thing
> > > same in Mannequin.any file,even i changed the load equal to zero in
> > > Standing Model.
> > > Please let me know what the reasons may be.
> > >
> > > Seconly, i want to calculate the Forces with the
> > Flexion,Compression
> > > and Lateral Flexion of Lumber Spine in standing position.Can you
> > tell
> > > me how to do it?
> > >
> > > Thirdly,the same forces i want to calculate in sitting postion.Can
> > you
> > > tell me how to add a support(like Chair)in the Model.
> > >
> > > What you suggest should i use FreePosture or Standing Model for the
> > > above purposes?
> > >
> > > With best regards.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> “AnyBody Support” <support@>
> > wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > >
> > > >
> > > > I think this difference may originate from the differences in the
> > > posture.
> > > >
> > > >
> > > >
> > > > If the angle of the pelvis is different in the two models it will
> > > have a big
> > > > impact on the model, if the pelvis is tilted more backward in the
> > > standing
> > > > model it may have the result you list. Also the posture of the
> > arms will
> > > > have an influence on the result, so in order to compare the
> > results
> > > these
> > > > should also be the same.
> > > >
> > > >
> > > >
> > > > In the standing model there might also be a load applied in the
> > > > Mannequin.any file, please check the last section of the
> > > mannequin.any for
> > > > this, it may also have an impact in the results.
> > > >
> > > >
> > > >
> > > > I hope this helps you move on, otherwise please ask again.
> > > >
> > > >
> > > >
> > > > Have a nice weekend
> > > >
> > > >
> > > >
> > > > Best regards
> > > >
> > > > Søren, AnyBody Support
> > > >
> > > >
> > > >
> > > > _____
> > > >
> > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com]
> > > On Behalf
> > > > Of javed377
> > > > Sent: 26 October 2007 12:10
> > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > >
> > > >
> > > >
> > > >
> > > > Hi Soren,
> > > > Thank you very much for your guidance.
> > > > Now i have checked the rection force which are about 1400N with
> > > > FreePosture model. But when i changed the posture like in
> > standing
> > > > model we have,i mean i changed the values in Mannequin.any of
> > > > FreePosture to values as we have in Mannequin.any of Standing
> > model.
> > > > I got the force of 500N.
> > > > Can you tell me what are the reasons may be? as i think with
> > changing
> > > > the posture it should not be so big difference because we have
> > same
> > > > loading conditions etc.
> > > >
> > > > Thanks in advance.
> > > > and have a nice week end.
> > > >
> > > > Iqbal
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > > “AnyBody Support” <support@> wrote:
> > > > >
> > > > > Hi Iqbal
> > > > >
> > > > > I think it will be best to use the FreePostureModel, this can
> > be
> > > > > controlled by the Mannequin.any file.
> > > > >
> > > > > If you look at the following output
> > > > >
> > Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > aints.Reaction.Fout
> > > > >
> > > > > You will get the reaction forces in the joint comming from the
> > > > > external loads and the muscle contractions.
> > > > >
> > > > > In the same manner you can also look at the other joints in
> > the
> > > > > lumbar region.
> > > > >
> > > > > One more thing the FreepostureModel comes default, as a model
> > with
> > > > > no muscles, changing the include statement will from
> > > > >
> > > > >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > oMuscles.any”
> > > > >
> > > > > to
> > > > >
> > > > >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > ny”
> > > > >
> > > > >
> > > > > this will let you get the reaction forces.
> > > > >
> > > > >
> > > > > Please do not hesitate to ask again if you have further
> > questions.
> > > > >
> > > > > Best regards
> > > > > Søren, AnyBody Support
> > > > >
> > > > > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > > “javed377” <javed377@> wrote:
> > > > > >
> > > > > >
> > > > > > Hello to every one,
> > > > > >
> > > > > > Can any one tell me how to calucualte section forces between
> > Th12
> > > > > and
> > > > > > L1 in spine model for Zero degree inlcination? My final goal
> > is to
> > > > > > calculate the section forces in anybody spine model between
> > Th12
> > > > > and L1
> > > > > > for different positions.
> > > > > >
> > > > > > with best regards.
> > > > > >
> > > > > > Iqbal
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
Dear Iqbal
a. Outcomment the kinematic constraint between the backrest and the
thorax this is the object named “BackRestThoraxEq” this will remove the
constraint the make the thorax follow the backrest.
b. Instead add a driver for the pelvis thorax extension this is in the
“PostureDriver” it is already there, it just need to be enabled.
c. You need to consider if the support forces between the backrest and
the spine should remain. If you would like to switch them off you need to
out comment the following include statement in the Support.any file
“#include “BackRestSuppport.any””
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of javed377
Sent: 05 November 2007 17:43
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Section Forces in Spine
Dear Soren,
May be i am not able to ask you question well.
I mean if i have calculated the Section forces by setting PlevisThorax
angel=-60 degree then how i can know about final Rotational postion
(angle)of L1 segment or joint b/w L1 and Th12.
with best regards.
Iqbal
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@…> wrote:
>
> Dear Iqbal
>
>
>
> Q1:
>
> I am not sure i entirely understand the first question; i will try to
> explain how it works.
>
> In the spine model there are 6 spherical joints in the lumbar region.
> Instead of having to driver each of these dof a “spine rhythm” has been
> implemented this rhythm links the dof together so that the only
remaining
> dof left is the rotation between thorax and pelvis. These are the
angles you
> can specify in the mannequin file.
>
> So in terms of flexion you can not specify more angles than the
> PelvisThoraxExtension angle. If this is not suitable for your model you
> will need to switch of the Spine rhythm in the
> BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
freedom of
> the motion of the lumbar region, the drawback is of course that you
need to
> drive the three dof of each of the joints to make the model kinematical
> determined.
>
>
>
> Q2:
>
> The values in the Mannequin.any file can be used for two things.
>
> 1) To calculate initialpositions at load time (this is what
you saw)
>
> 2) For driving the model when running an analysis. Most models
to not
> use all the values in the Mannequin when the analysis is running.
In the
> case of the seatedhuman the chair a connection between the backrest and
> thorax drives the flexion/extension of the spine not the Mannequin.
It is
> only the FreePosture models where all dof in the model are driven
directly
> by the mannequin values.
>
>
>
> Q3:
>
> Yes there is a contact the definition of this can be found in the file
> Support.any, the friction coefficients can be found in the top of the
> SeatedHuman.main.any file.
>
>
>
> Please ask again if you have further questions
>
>
>
> Best regards
>
> Søren, AnyBody Support
>
>
>
>
>
>
>
> _____
>
> From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
[mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
On Behalf
> Of javed377
> Sent: 02 November 2007 17:22
> To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> Subject: [AnyScript] Re: Section Forces in Spine
>
>
>
> Dear Soren,
> Thanks for you cooperation.
> 1.To calculate the forces for a standing positon in flexion i have
> used the standing model and then drove the pelvisThorax angle.But its
> the angle between pelvis and Thorax and i need the flexion in Lumber
> Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> Spine if i have pelvisThrox angel of -60 degree?a
>
> 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> degree,firstly it there was flexion but when i run the InverseDynamic
> Analysis it came back again in sitting position and the Forces were
> same like i have in the Seated Model.
>
> 3.Can you tell me is there contact between Spine and Back of the cahir
> in the SeatedModel and if there is contact then what is the
> coefficient of friction?
>
> With best regards.
>
> Iqbal
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “AnyBody Support” <support@>
>
> wrote:
> >
> > Hi Iqbal
> >
> > Even if the Mannequin.any are the same it is not certain that the
> > postures are the same, I will try to exaplin why:
> >
> > The standing model is driven only partly by the settings in the
> > Mannequin.any file, the freeposture model is driven 100% by the
> > mannequin.any file. In the standing model there is as i recall it a
> > center of mass driver that ensures that the center of mass of the
> > entire model is placed above the ankles.
> >
> > The angles in the Mannequin.any file is used at load time to set the
> > initial positions and for driving some of the dof in the model once
> > you run the kinematic analysis.
> >
> > To calculate the forces for a standing positon in flexion i would
> > use the standing model and then drive the pelvisThorax angle to
> > obtain the wanted postures of the spine and read out the compression
> > forces as the values i mentioned in a previous answer.
> >
> > If you want to the same for a seated person i would start using the
> > SeatedHuman model. This is a seated person with the proper boundary
> > conditions.
> >
> > I hope this helps you move on otherwise please write again.
> >
> > Best regards
> > Søren, AnyBody Support
> >
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> “javed377” <javed377@> wrote:
> > >
> > > Hello Soren,
> > >
> > > Thanks for your guidance.
> > > Firslty As you told that posture have large effect on Reaction
> > > foreces,i have check too.But i have checked with FreePosture model
> > and
> > > Standing Model,they have difference of about 100N with every thing
> > > same in Mannequin.any file,even i changed the load equal to zero in
> > > Standing Model.
> > > Please let me know what the reasons may be.
> > >
> > > Seconly, i want to calculate the Forces with the
> > Flexion,Compression
> > > and Lateral Flexion of Lumber Spine in standing position.Can you
> > tell
> > > me how to do it?
> > >
> > > Thirdly,the same forces i want to calculate in sitting postion.Can
> > you
> > > tell me how to add a support(like Chair)in the Model.
> > >
> > > What you suggest should i use FreePosture or Standing Model for the
> > > above purposes?
> > >
> > > With best regards.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> “AnyBody Support” <support@>
> > wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > >
> > > >
> > > > I think this difference may originate from the differences in the
> > > posture.
> > > >
> > > >
> > > >
> > > > If the angle of the pelvis is different in the two models it will
> > > have a big
> > > > impact on the model, if the pelvis is tilted more backward in the
> > > standing
> > > > model it may have the result you list. Also the posture of the
> > arms will
> > > > have an influence on the result, so in order to compare the
> > results
> > > these
> > > > should also be the same.
> > > >
> > > >
> > > >
> > > > In the standing model there might also be a load applied in the
> > > > Mannequin.any file, please check the last section of the
> > > mannequin.any for
> > > > this, it may also have an impact in the results.
> > > >
> > > >
> > > >
> > > > I hope this helps you move on, otherwise please ask again.
> > > >
> > > >
> > > >
> > > > Have a nice weekend
> > > >
> > > >
> > > >
> > > > Best regards
> > > >
> > > > Søren, AnyBody Support
> > > >
> > > >
> > > >
> > > > _____
> > > >
> > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com]
> > > On Behalf
> > > > Of javed377
> > > > Sent: 26 October 2007 12:10
> > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > >
> > > >
> > > >
> > > >
> > > > Hi Soren,
> > > > Thank you very much for your guidance.
> > > > Now i have checked the rection force which are about 1400N with
> > > > FreePosture model. But when i changed the posture like in
> > standing
> > > > model we have,i mean i changed the values in Mannequin.any of
> > > > FreePosture to values as we have in Mannequin.any of Standing
> > model.
> > > > I got the force of 500N.
> > > > Can you tell me what are the reasons may be? as i think with
> > changing
> > > > the posture it should not be so big difference because we have
> > same
> > > > loading conditions etc.
> > > >
> > > > Thanks in advance.
> > > > and have a nice week end.
> > > >
> > > > Iqbal
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > > “AnyBody Support” <support@> wrote:
> > > > >
> > > > > Hi Iqbal
> > > > >
> > > > > I think it will be best to use the FreePostureModel, this can
> > be
> > > > > controlled by the Mannequin.any file.
> > > > >
> > > > > If you look at the following output
> > > > >
> > Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > aints.Reaction.Fout
> > > > >
> > > > > You will get the reaction forces in the joint comming from the
> > > > > external loads and the muscle contractions.
> > > > >
> > > > > In the same manner you can also look at the other joints in
> > the
> > > > > lumbar region.
> > > > >
> > > > > One more thing the FreepostureModel comes default, as a model
> > with
> > > > > no muscles, changing the include statement will from
> > > > >
> > > > >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > oMuscles.any”
> > > > >
> > > > > to
> > > > >
> > > > >
> > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > ny”
> > > > >
> > > > >
> > > > > this will let you get the reaction forces.
> > > > >
> > > > >
> > > > > Please do not hesitate to ask again if you have further
> > questions.
> > > > >
> > > > > Best regards
> > > > > Søren, AnyBody Support
> > > > >
> > > > > —In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > > “javed377” <javed377@> wrote:
> > > > > >
> > > > > >
> > > > > > Hello to every one,
> > > > > >
> > > > > > Can any one tell me how to calucualte section forces between
> > Th12
> > > > > and
> > > > > > L1 in spine model for Zero degree inlcination? My final goal
> > is to
> > > > > > calculate the section forces in anybody spine model between
> > Th12
> > > > > and L1
> > > > > > for different positions.
> > > > > >
> > > > > > with best regards.
> > > > > >
> > > > > > Iqbal
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
Dear Soren,
I need few clarification.
1.The
varible(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
is to check the angle between L1&Th12 on the joint.Thanks for it.
Is there any varible which can give only angle value for L1 segment?
and similarly only for sacram.
2.When i click for the variabel(Main.Study.Output.Model.HumanModel.
Trunk.JointsLumbar.T12L1Jnt.Pos),except,Pos,Vel,Acc variables there are
folders:Constraint,Linear and Orientation.these folders also have same
variables and some other folders.
Can you tell me what they represent?(or the angle or just values on
x,y and z axes.
3.I tried a lot to have flexion for seatedhuman model but does seem to
be working.any suggestion?
thanks for your patience.
Iqbal
— In anyscript@yahoogroups.com, “AnyBody Support” <support@…> wrote:
>
> Dear Iqbal
>
>
>
> 1. Ok I think i understand, after having set the PelvisThorax angle to
> for example -60 and running the inverse analysis you would like to
read out
> the angle between for example L1 and T12?. This can simply be done, by
> looking at the variable
> “Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos”
this
> will give you the joint angle measured in radians.
> 2. Then you will need to make changes in the JointAndDriver.any file of
> the model. You will need to do the following steps:
>
> a. Outcomment the kinematic constraint between the backrest and the
> thorax this is the object named “BackRestThoraxEq” this will remove the
> constraint the make the thorax follow the backrest.
> b. Instead add a driver for the pelvis thorax extension this is in the
> “PostureDriver” it is already there, it just need to be enabled.
> c. You need to consider if the support forces between the backrest and
> the spine should remain. If you would like to switch them off you
need to
> out comment the following include statement in the Support.any file
> “#include “BackRestSuppport.any””
>
>
>
>
>
> Best regards
>
> Søren, AnyBody Support
>
>
>
>
>
> _____
>
> From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com]
On Behalf
> Of javed377
> Sent: 05 November 2007 17:43
> To: anyscript@yahoogroups.com
> Subject: [AnyScript] Re: Section Forces in Spine
>
>
>
> Dear Soren,
> May be i am not able to ask you question well.
>
> 1. I am just looking for Rotational positions(angle) of different
> Nodes of segmments in final positon i.e after Analysis.
>
> I mean if i have calculated the Section forces by setting PlevisThorax
> angel=-60 degree then how i can know about final Rotational postion
> (angle)of L1 segment or joint b/w L1 and Th12.
>
> 2. I want to run the SeatedHuman model in posture of Flexion at
> different PelvisThroxRot angles,because i can’t do it just by changing
> the PelvisThroxRot in Mannequin.
> I mean model should remain in give Flexion posion when i run
> InverseDynamic Analysis.But how?
>
> with best regards.
>
> Iqbal
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “AnyBody Support” <support@> wrote:
> >
> > Dear Iqbal
> >
> >
> >
> > Q1:
> >
> > I am not sure i entirely understand the first question; i will try to
> > explain how it works.
> >
> > In the spine model there are 6 spherical joints in the lumbar region.
> > Instead of having to driver each of these dof a “spine rhythm” has
been
> > implemented this rhythm links the dof together so that the only
> remaining
> > dof left is the rotation between thorax and pelvis. These are the
> angles you
> > can specify in the mannequin file.
> >
> > So in terms of flexion you can not specify more angles than the
> > PelvisThoraxExtension angle. If this is not suitable for your
model you
> > will need to switch of the Spine rhythm in the
> > BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
> freedom of
> > the motion of the lumbar region, the drawback is of course that you
> need to
> > drive the three dof of each of the joints to make the model
kinematical
> > determined.
> >
> >
> >
> > Q2:
> >
> > The values in the Mannequin.any file can be used for two things.
> >
> > 1) To calculate initialpositions at load time (this is what
> you saw)
> >
> > 2) For driving the model when running an analysis. Most models
> to not
> > use all the values in the Mannequin when the analysis is running.
> In the
> > case of the seatedhuman the chair a connection between the
backrest and
> > thorax drives the flexion/extension of the spine not the Mannequin.
> It is
> > only the FreePosture models where all dof in the model are driven
> directly
> > by the mannequin values.
> >
> >
> >
> > Q3:
> >
> > Yes there is a contact the definition of this can be found in the file
> > Support.any, the friction coefficients can be found in the top of the
> > SeatedHuman.main.any file.
> >
> >
> >
> > Please ask again if you have further questions
> >
> >
> >
> > Best regards
> >
> > Søren, AnyBody Support
> >
> >
> >
> >
> >
> >
> >
> > _____
> >
> > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
> On Behalf
> > Of javed377
> > Sent: 02 November 2007 17:22
> > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > Subject: [AnyScript] Re: Section Forces in Spine
> >
> >
> >
> > Dear Soren,
> > Thanks for you cooperation.
> > 1.To calculate the forces for a standing positon in flexion i have
> > used the standing model and then drove the pelvisThorax angle.But its
> > the angle between pelvis and Thorax and i need the flexion in Lumber
> > Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> > Spine if i have pelvisThrox angel of -60 degree?a
> >
> > 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> > degree,firstly it there was flexion but when i run the InverseDynamic
> > Analysis it came back again in sitting position and the Forces were
> > same like i have in the Seated Model.
> >
> > 3.Can you tell me is there contact between Spine and Back of the cahir
> > in the SeatedModel and if there is contact then what is the
> > coefficient of friction?
> >
> > With best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “AnyBody Support” <support@>
> >
> > wrote:
> > >
> > > Hi Iqbal
> > >
> > > Even if the Mannequin.any are the same it is not certain that the
> > > postures are the same, I will try to exaplin why:
> > >
> > > The standing model is driven only partly by the settings in the
> > > Mannequin.any file, the freeposture model is driven 100% by the
> > > mannequin.any file. In the standing model there is as i recall it a
> > > center of mass driver that ensures that the center of mass of the
> > > entire model is placed above the ankles.
> > >
> > > The angles in the Mannequin.any file is used at load time to set
the
> > > initial positions and for driving some of the dof in the model once
> > > you run the kinematic analysis.
> > >
> > > To calculate the forces for a standing positon in flexion i would
> > > use the standing model and then drive the pelvisThorax angle to
> > > obtain the wanted postures of the spine and read out the
compression
> > > forces as the values i mentioned in a previous answer.
> > >
> > > If you want to the same for a seated person i would start using the
> > > SeatedHuman model. This is a seated person with the proper boundary
> > > conditions.
> > >
> > > I hope this helps you move on otherwise please write again.
> > >
> > > Best regards
> > > Søren, AnyBody Support
> > >
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > “javed377” <javed377@> wrote:
> > > >
> > > > Hello Soren,
> > > >
> > > > Thanks for your guidance.
> > > > Firslty As you told that posture have large effect on Reaction
> > > > foreces,i have check too.But i have checked with FreePosture
model
> > > and
> > > > Standing Model,they have difference of about 100N with every thing
> > > > same in Mannequin.any file,even i changed the load equal to
zero in
> > > > Standing Model.
> > > > Please let me know what the reasons may be.
> > > >
> > > > Seconly, i want to calculate the Forces with the
> > > Flexion,Compression
> > > > and Lateral Flexion of Lumber Spine in standing position.Can you
> > > tell
> > > > me how to do it?
> > > >
> > > > Thirdly,the same forces i want to calculate in sitting
postion.Can
> > > you
> > > > tell me how to add a support(like Chair)in the Model.
> > > >
> > > > What you suggest should i use FreePosture or Standing Model
for the
> > > > above purposes?
> > > >
> > > > With best regards.
> > > >
> > > > Iqbal
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > “AnyBody Support” <support@>
> > > wrote:
> > > > >
> > > > > Hi Iqbal
> > > > >
> > > > >
> > > > >
> > > > > I think this difference may originate from the differences
in the
> > > > posture.
> > > > >
> > > > >
> > > > >
> > > > > If the angle of the pelvis is different in the two models it
will
> > > > have a big
> > > > > impact on the model, if the pelvis is tilted more backward
in the
> > > > standing
> > > > > model it may have the result you list. Also the posture of the
> > > arms will
> > > > > have an influence on the result, so in order to compare the
> > > results
> > > > these
> > > > > should also be the same.
> > > > >
> > > > >
> > > > >
> > > > > In the standing model there might also be a load applied in the
> > > > > Mannequin.any file, please check the last section of the
> > > > mannequin.any for
> > > > > this, it may also have an impact in the results.
> > > > >
> > > > >
> > > > >
> > > > > I hope this helps you move on, otherwise please ask again.
> > > > >
> > > > >
> > > > >
> > > > > Have a nice weekend
> > > > >
> > > > >
> > > > >
> > > > > Best regards
> > > > >
> > > > > Søren, AnyBody Support
> > > > >
> > > > >
> > > > >
> > > > > _____
> > > > >
> > > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com
> > > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com]
> > > > On Behalf
> > > > > Of javed377
> > > > > Sent: 26 October 2007 12:10
> > > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com
> > > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Hi Soren,
> > > > > Thank you very much for your guidance.
> > > > > Now i have checked the rection force which are about 1400N with
> > > > > FreePosture model. But when i changed the posture like in
> > > standing
> > > > > model we have,i mean i changed the values in Mannequin.any of
> > > > > FreePosture to values as we have in Mannequin.any of Standing
> > > model.
> > > > > I got the force of 500N.
> > > > > Can you tell me what are the reasons may be? as i think with
> > > changing
> > > > > the posture it should not be so big difference because we have
> > > same
> > > > > loading conditions etc.
> > > > >
> > > > > Thanks in advance.
> > > > > and have a nice week end.
> > > > >
> > > > > Iqbal
> > > > >
> > > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > > ps.com,
> > > > > “AnyBody Support” <support@> wrote:
> > > > > >
> > > > > > Hi Iqbal
> > > > > >
> > > > > > I think it will be best to use the FreePostureModel, this can
> > > be
> > > > > > controlled by the Mannequin.any file.
> > > > > >
> > > > > > If you look at the following output
> > > > > >
> > >
Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > > aints.Reaction.Fout
> > > > > >
> > > > > > You will get the reaction forces in the joint comming from
the
> > > > > > external loads and the muscle contractions.
> > > > > >
> > > > > > In the same manner you can also look at the other joints in
> > > the
> > > > > > lumbar region.
> > > > > >
> > > > > > One more thing the FreepostureModel comes default, as a model
> > > with
> > > > > > no muscles, changing the include statement will from
> > > > > >
> > > > > >
> > > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > > oMuscles.any”
> > > > > >
> > > > > > to
> > > > > >
> > > > > >
> > > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > > ny”
> > > > > >
> > > > > >
> > > > > > this will let you get the reaction forces.
> > > > > >
> > > > > >
> > > > > > Please do not hesitate to ask again if you have further
> > > questions.
> > > > > >
> > > > > > Best regards
> > > > > > Søren, AnyBody Support
> > > > > >
> > > > > > —In anyscript@yahoogrou
<mailto:anyscript%40yahoogroups.com>
> > > ps.com,
> > > > > “javed377” <javed377@> wrote:
> > > > > > >
> > > > > > >
> > > > > > > Hello to every one,
> > > > > > >
> > > > > > > Can any one tell me how to calucualte section forces
between
> > > Th12
> > > > > > and
> > > > > > > L1 in spine model for Zero degree inlcination? My final
goal
> > > is to
> > > > > > > calculate the section forces in anybody spine model between
> > > Th12
> > > > > > and L1
> > > > > > > for different positions.
> > > > > > >
> > > > > > > with best regards.
> > > > > > >
> > > > > > > Iqbal
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > >
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
Hi Iqbal
Sorry about the slow reply
Yes you are right this angle measure the angle between T12 and L1. If you
would like to have the angle measured between a segment and the global ref
frame you can use an AnyKinRotational for measuring this. For details about
this please refer to the reference manual.
The constraints folder contains contains the constraints of the joint,
the “linear” is the linear measure in the joint and rotational is the
rotational measure. Please search for AnySphericalJoint in the ref. manual
there you can find much more information.
II have just answered another posting on the same topic, my directions
was not sufficient I am very sorry about that, there was a few more things
to be changed. I have uploaded a new file in the folder
SeatedHumanFreeThorax, it should solve the problem, I think.
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of javed377
Sent: 09 November 2007 14:27
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Section Forces in Spine
Dear Soren,
I need few clarification.
1.The
varible(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
is to check the angle between L1&Th12 on the joint.Thanks for it.
Is there any varible which can give only angle value for L1 segment?
and similarly only for sacram.
2.When i click for the variabel(Main.Study.Output.Model.HumanModel.
Trunk.JointsLumbar.T12L1Jnt.Pos),except,Pos,Vel,Acc variables there are
folders:Constraint,Linear and Orientation.these folders also have same
variables and some other folders.
Can you tell me what they represent?(or the angle or just values on
x,y and z axes.
3.I tried a lot to have flexion for seatedhuman model but does seem to
be working.any suggestion?
thanks for your patience.
Iqbal
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@…> wrote:
>
> Dear Iqbal
>
>
>
> 1. Ok I think i understand, after having set the PelvisThorax angle to
> for example -60 and running the inverse analysis you would like to
read out
> the angle between for example L1 and T12?. This can simply be done, by
> looking at the variable
> “Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos”
this
> will give you the joint angle measured in radians.
> 2. Then you will need to make changes in the JointAndDriver.any file of
> the model. You will need to do the following steps:
>
> a. Outcomment the kinematic constraint between the backrest and the
> thorax this is the object named “BackRestThoraxEq” this will remove the
> constraint the make the thorax follow the backrest.
> b. Instead add a driver for the pelvis thorax extension this is in the
> “PostureDriver” it is already there, it just need to be enabled.
> c. You need to consider if the support forces between the backrest and
> the spine should remain. If you would like to switch them off you
need to
> out comment the following include statement in the Support.any file
> “#include “BackRestSuppport.any””
>
>
>
>
>
> Best regards
>
> Søren, AnyBody Support
>
>
>
>
>
> _____
>
> From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
[mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
On Behalf
> Of javed377
> Sent: 05 November 2007 17:43
> To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> Subject: [AnyScript] Re: Section Forces in Spine
>
>
>
> Dear Soren,
> May be i am not able to ask you question well.
>
> 1. I am just looking for Rotational positions(angle) of different
> Nodes of segmments in final positon i.e after Analysis.
>
> I mean if i have calculated the Section forces by setting PlevisThorax
> angel=-60 degree then how i can know about final Rotational postion
> (angle)of L1 segment or joint b/w L1 and Th12.
>
> 2. I want to run the SeatedHuman model in posture of Flexion at
> different PelvisThroxRot angles,because i can’t do it just by changing
> the PelvisThroxRot in Mannequin.
> I mean model should remain in give Flexion posion when i run
> InverseDynamic Analysis.But how?
>
> with best regards.
>
> Iqbal
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
> “AnyBody Support” <support@> wrote:
> >
> > Dear Iqbal
> >
> >
> >
> > Q1:
> >
> > I am not sure i entirely understand the first question; i will try to
> > explain how it works.
> >
> > In the spine model there are 6 spherical joints in the lumbar region.
> > Instead of having to driver each of these dof a “spine rhythm” has
been
> > implemented this rhythm links the dof together so that the only
> remaining
> > dof left is the rotation between thorax and pelvis. These are the
> angles you
> > can specify in the mannequin file.
> >
> > So in terms of flexion you can not specify more angles than the
> > PelvisThoraxExtension angle. If this is not suitable for your
model you
> > will need to switch of the Spine rhythm in the
> > BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
> freedom of
> > the motion of the lumbar region, the drawback is of course that you
> need to
> > drive the three dof of each of the joints to make the model
kinematical
> > determined.
> >
> >
> >
> > Q2:
> >
> > The values in the Mannequin.any file can be used for two things.
> >
> > 1) To calculate initialpositions at load time (this is what
> you saw)
> >
> > 2) For driving the model when running an analysis. Most models
> to not
> > use all the values in the Mannequin when the analysis is running.
> In the
> > case of the seatedhuman the chair a connection between the
backrest and
> > thorax drives the flexion/extension of the spine not the Mannequin.
> It is
> > only the FreePosture models where all dof in the model are driven
> directly
> > by the mannequin values.
> >
> >
> >
> > Q3:
> >
> > Yes there is a contact the definition of this can be found in the file
> > Support.any, the friction coefficients can be found in the top of the
> > SeatedHuman.main.any file.
> >
> >
> >
> > Please ask again if you have further questions
> >
> >
> >
> > Best regards
> >
> > Søren, AnyBody Support
> >
> >
> >
> >
> >
> >
> >
> > _____
> >
> > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
> On Behalf
> > Of javed377
> > Sent: 02 November 2007 17:22
> > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > Subject: [AnyScript] Re: Section Forces in Spine
> >
> >
> >
> > Dear Soren,
> > Thanks for you cooperation.
> > 1.To calculate the forces for a standing positon in flexion i have
> > used the standing model and then drove the pelvisThorax angle.But its
> > the angle between pelvis and Thorax and i need the flexion in Lumber
> > Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> > Spine if i have pelvisThrox angel of -60 degree?a
> >
> > 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> > degree,firstly it there was flexion but when i run the InverseDynamic
> > Analysis it came back again in sitting position and the Forces were
> > same like i have in the Seated Model.
> >
> > 3.Can you tell me is there contact between Spine and Back of the cahir
> > in the SeatedModel and if there is contact then what is the
> > coefficient of friction?
> >
> > With best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “AnyBody Support” <support@>
> >
> > wrote:
> > >
> > > Hi Iqbal
> > >
> > > Even if the Mannequin.any are the same it is not certain that the
> > > postures are the same, I will try to exaplin why:
> > >
> > > The standing model is driven only partly by the settings in the
> > > Mannequin.any file, the freeposture model is driven 100% by the
> > > mannequin.any file. In the standing model there is as i recall it a
> > > center of mass driver that ensures that the center of mass of the
> > > entire model is placed above the ankles.
> > >
> > > The angles in the Mannequin.any file is used at load time to set
the
> > > initial positions and for driving some of the dof in the model once
> > > you run the kinematic analysis.
> > >
> > > To calculate the forces for a standing positon in flexion i would
> > > use the standing model and then drive the pelvisThorax angle to
> > > obtain the wanted postures of the spine and read out the
compression
> > > forces as the values i mentioned in a previous answer.
> > >
> > > If you want to the same for a seated person i would start using the
> > > SeatedHuman model. This is a seated person with the proper boundary
> > > conditions.
> > >
> > > I hope this helps you move on otherwise please write again.
> > >
> > > Best regards
> > > Søren, AnyBody Support
> > >
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > “javed377” <javed377@> wrote:
> > > >
> > > > Hello Soren,
> > > >
> > > > Thanks for your guidance.
> > > > Firslty As you told that posture have large effect on Reaction
> > > > foreces,i have check too.But i have checked with FreePosture
model
> > > and
> > > > Standing Model,they have difference of about 100N with every thing
> > > > same in Mannequin.any file,even i changed the load equal to
zero in
> > > > Standing Model.
> > > > Please let me know what the reasons may be.
> > > >
> > > > Seconly, i want to calculate the Forces with the
> > > Flexion,Compression
> > > > and Lateral Flexion of Lumber Spine in standing position.Can you
> > > tell
> > > > me how to do it?
> > > >
> > > > Thirdly,the same forces i want to calculate in sitting
postion.Can
> > > you
> > > > tell me how to add a support(like Chair)in the Model.
> > > >
> > > > What you suggest should i use FreePosture or Standing Model
for the
> > > > above purposes?
> > > >
> > > > With best regards.
> > > >
> > > > Iqbal
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > “AnyBody Support” <support@>
> > > wrote:
> > > > >
> > > > > Hi Iqbal
> > > > >
> > > > >
> > > > >
> > > > > I think this difference may originate from the differences
in the
> > > > posture.
> > > > >
> > > > >
> > > > >
> > > > > If the angle of the pelvis is different in the two models it
will
> > > > have a big
> > > > > impact on the model, if the pelvis is tilted more backward
in the
> > > > standing
> > > > > model it may have the result you list. Also the posture of the
> > > arms will
> > > > > have an influence on the result, so in order to compare the
> > > results
> > > > these
> > > > > should also be the same.
> > > > >
> > > > >
> > > > >
> > > > > In the standing model there might also be a load applied in the
> > > > > Mannequin.any file, please check the last section of the
> > > > mannequin.any for
> > > > > this, it may also have an impact in the results.
> > > > >
> > > > >
> > > > >
> > > > > I hope this helps you move on, otherwise please ask again.
> > > > >
> > > > >
> > > > >
> > > > > Have a nice weekend
> > > > >
> > > > >
> > > > >
> > > > > Best regards
> > > > >
> > > > > Søren, AnyBody Support
> > > > >
> > > > >
> > > > >
> > > > > _____
> > > > >
> > > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com
> > > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com]
> > > > On Behalf
> > > > > Of javed377
> > > > > Sent: 26 October 2007 12:10
> > > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com
> > > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Hi Soren,
> > > > > Thank you very much for your guidance.
> > > > > Now i have checked the rection force which are about 1400N with
> > > > > FreePosture model. But when i changed the posture like in
> > > standing
> > > > > model we have,i mean i changed the values in Mannequin.any of
> > > > > FreePosture to values as we have in Mannequin.any of Standing
> > > model.
> > > > > I got the force of 500N.
> > > > > Can you tell me what are the reasons may be? as i think with
> > > changing
> > > > > the posture it should not be so big difference because we have
> > > same
> > > > > loading conditions etc.
> > > > >
> > > > > Thanks in advance.
> > > > > and have a nice week end.
> > > > >
> > > > > Iqbal
> > > > >
> > > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > > ps.com,
> > > > > “AnyBody Support” <support@> wrote:
> > > > > >
> > > > > > Hi Iqbal
> > > > > >
> > > > > > I think it will be best to use the FreePostureModel, this can
> > > be
> > > > > > controlled by the Mannequin.any file.
> > > > > >
> > > > > > If you look at the following output
> > > > > >
> > >
Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > > aints.Reaction.Fout
> > > > > >
> > > > > > You will get the reaction forces in the joint comming from
the
> > > > > > external loads and the muscle contractions.
> > > > > >
> > > > > > In the same manner you can also look at the other joints in
> > > the
> > > > > > lumbar region.
> > > > > >
> > > > > > One more thing the FreepostureModel comes default, as a model
> > > with
> > > > > > no muscles, changing the include statement will from
> > > > > >
> > > > > >
> > > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > > oMuscles.any”
> > > > > >
> > > > > > to
> > > > > >
> > > > > >
> > > #include “…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > > ny”
> > > > > >
> > > > > >
> > > > > > this will let you get the reaction forces.
> > > > > >
> > > > > >
> > > > > > Please do not hesitate to ask again if you have further
> > > questions.
> > > > > >
> > > > > > Best regards
> > > > > > Søren, AnyBody Support
> > > > > >
> > > > > > —In anyscript@yahoogrou
<mailto:anyscript%40yahoogroups.com>
> > > ps.com,
> > > > > “javed377” <javed377@> wrote:
> > > > > > >
> > > > > > >
> > > > > > > Hello to every one,
> > > > > > >
> > > > > > > Can any one tell me how to calucualte section forces
between
> > > Th12
> > > > > > and
> > > > > > > L1 in spine model for Zero degree inlcination? My final
goal
> > > is to
> > > > > > > calculate the section forces in anybody spine model between
> > > Th12
> > > > > > and L1
> > > > > > > for different positions.
> > > > > > >
> > > > > > > with best regards.
> > > > > > >
> > > > > > > Iqbal
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > >
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
DearSoren,
Can you tell me where i can find the angular postions(anlges) on
Lumber joints when PelvisThoraxExtension=0 because the
variable(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
tells angle only PelvisThoraxExtension angle is not equal to zero.I
mean just in stading position(without flexion).
with best regards.
Iqbal
— In anyscript@yahoogroups.com, “javed377” <javed377@…> wrote:
>
> Dear Soren,
> I need few clarification.
>
> 1.The
>
varible(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
> is to check the angle between L1&Th12 on the joint.Thanks for it.
> Is there any varible which can give only angle value for L1 segment?
> and similarly only for sacram.
> 2.When i click for the variabel(Main.Study.Output.Model.HumanModel.
> Trunk.JointsLumbar.T12L1Jnt.Pos),except,Pos,Vel,Acc variables there
are
> folders:Constraint,Linear and Orientation.these folders also have same
> variables and some other folders.
> Can you tell me what they represent?(or the angle or just values on
> x,y and z axes.
>
> 3.I tried a lot to have flexion for seatedhuman model but does seem to
> be working.any suggestion?
>
> thanks for your patience.
>
> Iqbal
>
>
>
>
> — In anyscript@yahoogroups.com, “AnyBody Support” <support@> wrote:
> >
> > Dear Iqbal
> >
> >
> >
> > 1. Ok I think i understand, after having set the PelvisThorax
angle to
> > for example -60 and running the inverse analysis you would like to
> read out
> > the angle between for example L1 and T12?. This can simply be done, by
> > looking at the variable
> > “Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos”
> this
> > will give you the joint angle measured in radians.
> > 2. Then you will need to make changes in the JointAndDriver.any
file of
> > the model. You will need to do the following steps:
> >
> > a. Outcomment the kinematic constraint between the backrest and the
> > thorax this is the object named “BackRestThoraxEq” this will
remove the
> > constraint the make the thorax follow the backrest.
> > b. Instead add a driver for the pelvis thorax extension this is in the
> > “PostureDriver” it is already there, it just need to be enabled.
> > c. You need to consider if the support forces between the backrest and
> > the spine should remain. If you would like to switch them off you
> need to
> > out comment the following include statement in the Support.any file
> > “#include “BackRestSuppport.any””
> >
> >
> >
> >
> >
> > Best regards
> >
> > Søren, AnyBody Support
> >
> >
> >
> >
> >
> > _____
> >
> > From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com]
> On Behalf
> > Of javed377
> > Sent: 05 November 2007 17:43
> > To: anyscript@yahoogroups.com
> > Subject: [AnyScript] Re: Section Forces in Spine
> >
> >
> >
> > Dear Soren,
> > May be i am not able to ask you question well.
> >
> > 1. I am just looking for Rotational positions(angle) of different
> > Nodes of segmments in final positon i.e after Analysis.
> >
> > I mean if i have calculated the Section forces by setting PlevisThorax
> > angel=-60 degree then how i can know about final Rotational postion
> > (angle)of L1 segment or joint b/w L1 and Th12.
> >
> > 2. I want to run the SeatedHuman model in posture of Flexion at
> > different PelvisThroxRot angles,because i can’t do it just by changing
> > the PelvisThroxRot in Mannequin.
> > I mean model should remain in give Flexion posion when i run
> > InverseDynamic Analysis.But how?
> >
> > with best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “AnyBody Support” <support@> wrote:
> > >
> > > Dear Iqbal
> > >
> > >
> > >
> > > Q1:
> > >
> > > I am not sure i entirely understand the first question; i will
try to
> > > explain how it works.
> > >
> > > In the spine model there are 6 spherical joints in the lumbar
region.
> > > Instead of having to driver each of these dof a “spine rhythm” has
> been
> > > implemented this rhythm links the dof together so that the only
> > remaining
> > > dof left is the rotation between thorax and pelvis. These are the
> > angles you
> > > can specify in the mannequin file.
> > >
> > > So in terms of flexion you can not specify more angles than the
> > > PelvisThoraxExtension angle. If this is not suitable for your
> model you
> > > will need to switch of the Spine rhythm in the
> > > BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
> > freedom of
> > > the motion of the lumbar region, the drawback is of course that you
> > need to
> > > drive the three dof of each of the joints to make the model
> kinematical
> > > determined.
> > >
> > >
> > >
> > > Q2:
> > >
> > > The values in the Mannequin.any file can be used for two things.
> > >
> > > 1) To calculate initialpositions at load time (this is what
> > you saw)
> > >
> > > 2) For driving the model when running an analysis. Most models
> > to not
> > > use all the values in the Mannequin when the analysis is running.
> > In the
> > > case of the seatedhuman the chair a connection between the
> backrest and
> > > thorax drives the flexion/extension of the spine not the Mannequin.
> > It is
> > > only the FreePosture models where all dof in the model are driven
> > directly
> > > by the mannequin values.
> > >
> > >
> > >
> > > Q3:
> > >
> > > Yes there is a contact the definition of this can be found in
the file
> > > Support.any, the friction coefficients can be found in the top
of the
> > > SeatedHuman.main.any file.
> > >
> > >
> > >
> > > Please ask again if you have further questions
> > >
> > >
> > >
> > > Best regards
> > >
> > > Søren, AnyBody Support
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > _____
> > >
> > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com]
> > On Behalf
> > > Of javed377
> > > Sent: 02 November 2007 17:22
> > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > > Subject: [AnyScript] Re: Section Forces in Spine
> > >
> > >
> > >
> > > Dear Soren,
> > > Thanks for you cooperation.
> > > 1.To calculate the forces for a standing positon in flexion i have
> > > used the standing model and then drove the pelvisThorax
angle.But its
> > > the angle between pelvis and Thorax and i need the flexion in
Lumber
> > > Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> > > Spine if i have pelvisThrox angel of -60 degree?a
> > >
> > > 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> > > degree,firstly it there was flexion but when i run the
InverseDynamic
> > > Analysis it came back again in sitting position and the Forces were
> > > same like i have in the Seated Model.
> > >
> > > 3.Can you tell me is there contact between Spine and Back of the
cahir
> > > in the SeatedModel and if there is contact then what is the
> > > coefficient of friction?
> > >
> > > With best regards.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “AnyBody Support” <support@>
> > >
> > > wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > > Even if the Mannequin.any are the same it is not certain that the
> > > > postures are the same, I will try to exaplin why:
> > > >
> > > > The standing model is driven only partly by the settings in the
> > > > Mannequin.any file, the freeposture model is driven 100% by the
> > > > mannequin.any file. In the standing model there is as i recall
it a
> > > > center of mass driver that ensures that the center of mass of the
> > > > entire model is placed above the ankles.
> > > >
> > > > The angles in the Mannequin.any file is used at load time to set
> the
> > > > initial positions and for driving some of the dof in the model
once
> > > > you run the kinematic analysis.
> > > >
> > > > To calculate the forces for a standing positon in flexion i would
> > > > use the standing model and then drive the pelvisThorax angle to
> > > > obtain the wanted postures of the spine and read out the
> compression
> > > > forces as the values i mentioned in a previous answer.
> > > >
> > > > If you want to the same for a seated person i would start
using the
> > > > SeatedHuman model. This is a seated person with the proper
boundary
> > > > conditions.
> > > >
> > > > I hope this helps you move on otherwise please write again.
> > > >
> > > > Best regards
> > > > Søren, AnyBody Support
> > > >
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > “javed377” <javed377@> wrote:
> > > > >
> > > > > Hello Soren,
> > > > >
> > > > > Thanks for your guidance.
> > > > > Firslty As you told that posture have large effect on Reaction
> > > > > foreces,i have check too.But i have checked with FreePosture
> model
> > > > and
> > > > > Standing Model,they have difference of about 100N with every
thing
> > > > > same in Mannequin.any file,even i changed the load equal to
> zero in
> > > > > Standing Model.
> > > > > Please let me know what the reasons may be.
> > > > >
> > > > > Seconly, i want to calculate the Forces with the
> > > > Flexion,Compression
> > > > > and Lateral Flexion of Lumber Spine in standing position.Can
you
> > > > tell
> > > > > me how to do it?
> > > > >
> > > > > Thirdly,the same forces i want to calculate in sitting
> postion.Can
> > > > you
> > > > > tell me how to add a support(like Chair)in the Model.
> > > > >
> > > > > What you suggest should i use FreePosture or Standing Model
> for the
> > > > > above purposes?
> > > > >
> > > > > With best regards.
> > > > >
> > > > > Iqbal
> > > > >
> > > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > “AnyBody Support” <support@>
> > > > wrote:
> > > > > >
> > > > > > Hi Iqbal
> > > > > >
> > > > > >
> > > > > >
> > > > > > I think this difference may originate from the differences
> in the
> > > > > posture.
> > > > > >
> > > > > >
> > > > > >
> > > > > > If the angle of the pelvis is different in the two models it
> will
> > > > > have a big
> > > > > > impact on the model, if the pelvis is tilted more backward
> in the
> > > > > standing
> > > > > > model it may have the result you list. Also the posture of
the
> > > > arms will
> > > > > > have an influence on the result, so in order to compare the
> > > > results
> > > > > these
> > > > > > should also be the same.
> > > > > >
> > > > > >
> > > > > >
> > > > > > In the standing model there might also be a load applied
in the
> > > > > > Mannequin.any file, please check the last section of the
> > > > > mannequin.any for
> > > > > > this, it may also have an impact in the results.
> > > > > >
> > > > > >
> > > > > >
> > > > > > I hope this helps you move on, otherwise please ask again.
> > > > > >
> > > > > >
> > > > > >
> > > > > > Have a nice weekend
> > > > > >
> > > > > >
> > > > > >
> > > > > > Best regards
> > > > > >
> > > > > > Søren, AnyBody Support
> > > > > >
> > > > > >
> > > > > >
> > > > > > _____
> > > > > >
> > > > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com
> > > > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com]
> > > > > On Behalf
> > > > > > Of javed377
> > > > > > Sent: 26 October 2007 12:10
> > > > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com
> > > > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Hi Soren,
> > > > > > Thank you very much for your guidance.
> > > > > > Now i have checked the rection force which are about 1400N
with
> > > > > > FreePosture model. But when i changed the posture like in
> > > > standing
> > > > > > model we have,i mean i changed the values in Mannequin.any of
> > > > > > FreePosture to values as we have in Mannequin.any of Standing
> > > > model.
> > > > > > I got the force of 500N.
> > > > > > Can you tell me what are the reasons may be? as i think with
> > > > changing
> > > > > > the posture it should not be so big difference because we
have
> > > > same
> > > > > > loading conditions etc.
> > > > > >
> > > > > > Thanks in advance.
> > > > > > and have a nice week end.
> > > > > >
> > > > > > Iqbal
> > > > > >
> > > > > > — In anyscript@yahoogrou
<mailto:anyscript%40yahoogroups.com>
> > > > ps.com,
> > > > > > “AnyBody Support” <support@> wrote:
> > > > > > >
> > > > > > > Hi Iqbal
> > > > > > >
> > > > > > > I think it will be best to use the FreePostureModel,
this can
> > > > be
> > > > > > > controlled by the Mannequin.any file.
> > > > > > >
> > > > > > > If you look at the following output
> > > > > > >
> > > >
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > > > aints.Reaction.Fout
> > > > > > >
> > > > > > > You will get the reaction forces in the joint comming from
> the
> > > > > > > external loads and the muscle contractions.
> > > > > > >
> > > > > > > In the same manner you can also look at the other joints in
> > > > the
> > > > > > > lumbar region.
> > > > > > >
> > > > > > > One more thing the FreepostureModel comes default, as a
model
> > > > with
> > > > > > > no muscles, changing the include statement will from
> > > > > > >
> > > > > > >
> > > > #include
“…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > > > oMuscles.any”
> > > > > > >
> > > > > > > to
> > > > > > >
> > > > > > >
> > > > #include
“…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > > > ny”
> > > > > > >
> > > > > > >
> > > > > > > this will let you get the reaction forces.
> > > > > > >
> > > > > > >
> > > > > > > Please do not hesitate to ask again if you have further
> > > > questions.
> > > > > > >
> > > > > > > Best regards
> > > > > > > Søren, AnyBody Support
> > > > > > >
> > > > > > > —In anyscript@yahoogrou
> <mailto:anyscript%40yahoogroups.com>
> > > > ps.com,
> > > > > > “javed377” <javed377@> wrote:
> > > > > > > >
> > > > > > > >
> > > > > > > > Hello to every one,
> > > > > > > >
> > > > > > > > Can any one tell me how to calucualte section forces
> between
> > > > Th12
> > > > > > > and
> > > > > > > > L1 in spine model for Zero degree inlcination? My final
> goal
> > > > is to
> > > > > > > > calculate the section forces in anybody spine model
between
> > > > Th12
> > > > > > > and L1
> > > > > > > > for different positions.
> > > > > > > >
> > > > > > > > with best regards.
> > > > > > > >
> > > > > > > > Iqbal
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > [Non-text portions of this message have been removed]
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
Hi Iqbal
The location listed for the joint positions are correct, so the angle you
will see there is the angle measured.
When the PelvisThoraxExtension is zero this will not necessarily mean that
the all the angles in the joints will be zero, this is a matter of how these
coordinate systems are defined locally on the vertebrae’s.
If you would like to see the definitions of these joints, please look in the
/brep/aalborg/spine/JoinstLumbar.any file.
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of javed377
Sent: 14 November 2007 17:39
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Section Forces in Spine
DearSoren,
Can you tell me where i can find the angular postions(anlges) on
Lumber joints when PelvisThoraxExtension=0 because the
variable(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
tells angle only PelvisThoraxExtension angle is not equal to zero.I
mean just in stading position(without flexion).
with best regards.
Iqbal
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“javed377” <javed377@…> wrote:
>
> Dear Soren,
> I need few clarification.
>
> 1.The
>
varible(Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos)
> is to check the angle between L1&Th12 on the joint.Thanks for it.
> Is there any varible which can give only angle value for L1 segment?
> and similarly only for sacram.
> 2.When i click for the variabel(Main.Study.Output.Model.HumanModel.
> Trunk.JointsLumbar.T12L1Jnt.Pos),except,Pos,Vel,Acc variables there
are
> folders:Constraint,Linear and Orientation.these folders also have same
> variables and some other folders.
> Can you tell me what they represent?(or the angle or just values on
> x,y and z axes.
>
> 3.I tried a lot to have flexion for seatedhuman model but does seem to
> be working.any suggestion?
>
> thanks for your patience.
>
> Iqbal
>
>
>
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@> wrote:
> >
> > Dear Iqbal
> >
> >
> >
> > 1. Ok I think i understand, after having set the PelvisThorax
angle to
> > for example -60 and running the inverse analysis you would like to
> read out
> > the angle between for example L1 and T12?. This can simply be done, by
> > looking at the variable
> > “Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Pos”
> this
> > will give you the joint angle measured in radians.
> > 2. Then you will need to make changes in the JointAndDriver.any
file of
> > the model. You will need to do the following steps:
> >
> > a. Outcomment the kinematic constraint between the backrest and the
> > thorax this is the object named “BackRestThoraxEq” this will
remove the
> > constraint the make the thorax follow the backrest.
> > b. Instead add a driver for the pelvis thorax extension this is in the
> > “PostureDriver” it is already there, it just need to be enabled.
> > c. You need to consider if the support forces between the backrest and
> > the spine should remain. If you would like to switch them off you
> need to
> > out comment the following include statement in the Support.any file
> > “#include “BackRestSuppport.any””
> >
> >
> >
> >
> >
> > Best regards
> >
> > Søren, AnyBody Support
> >
> >
> >
> >
> >
> > _____
> >
> > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
[mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
> On Behalf
> > Of javed377
> > Sent: 05 November 2007 17:43
> > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > Subject: [AnyScript] Re: Section Forces in Spine
> >
> >
> >
> > Dear Soren,
> > May be i am not able to ask you question well.
> >
> > 1. I am just looking for Rotational positions(angle) of different
> > Nodes of segmments in final positon i.e after Analysis.
> >
> > I mean if i have calculated the Section forces by setting PlevisThorax
> > angel=-60 degree then how i can know about final Rotational postion
> > (angle)of L1 segment or joint b/w L1 and Th12.
> >
> > 2. I want to run the SeatedHuman model in posture of Flexion at
> > different PelvisThroxRot angles,because i can’t do it just by changing
> > the PelvisThroxRot in Mannequin.
> > I mean model should remain in give Flexion posion when i run
> > InverseDynamic Analysis.But how?
> >
> > with best regards.
> >
> > Iqbal
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com,
> > “AnyBody Support” <support@> wrote:
> > >
> > > Dear Iqbal
> > >
> > >
> > >
> > > Q1:
> > >
> > > I am not sure i entirely understand the first question; i will
try to
> > > explain how it works.
> > >
> > > In the spine model there are 6 spherical joints in the lumbar
region.
> > > Instead of having to driver each of these dof a “spine rhythm” has
> been
> > > implemented this rhythm links the dof together so that the only
> > remaining
> > > dof left is the rotation between thorax and pelvis. These are the
> > angles you
> > > can specify in the mannequin file.
> > >
> > > So in terms of flexion you can not specify more angles than the
> > > PelvisThoraxExtension angle. If this is not suitable for your
> model you
> > > will need to switch of the Spine rhythm in the
> > > BRep/Aalborg/Spine/JointsLumbara.any file. This will give 100%
> > freedom of
> > > the motion of the lumbar region, the drawback is of course that you
> > need to
> > > drive the three dof of each of the joints to make the model
> kinematical
> > > determined.
> > >
> > >
> > >
> > > Q2:
> > >
> > > The values in the Mannequin.any file can be used for two things.
> > >
> > > 1) To calculate initialpositions at load time (this is what
> > you saw)
> > >
> > > 2) For driving the model when running an analysis. Most models
> > to not
> > > use all the values in the Mannequin when the analysis is running.
> > In the
> > > case of the seatedhuman the chair a connection between the
> backrest and
> > > thorax drives the flexion/extension of the spine not the Mannequin.
> > It is
> > > only the FreePosture models where all dof in the model are driven
> > directly
> > > by the mannequin values.
> > >
> > >
> > >
> > > Q3:
> > >
> > > Yes there is a contact the definition of this can be found in
the file
> > > Support.any, the friction coefficients can be found in the top
of the
> > > SeatedHuman.main.any file.
> > >
> > >
> > >
> > > Please ask again if you have further questions
> > >
> > >
> > >
> > > Best regards
> > >
> > > Søren, AnyBody Support
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > _____
> > >
> > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com
> > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
ps.com]
> > On Behalf
> > > Of javed377
> > > Sent: 02 November 2007 17:22
> > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> > > Subject: [AnyScript] Re: Section Forces in Spine
> > >
> > >
> > >
> > > Dear Soren,
> > > Thanks for you cooperation.
> > > 1.To calculate the forces for a standing positon in flexion i have
> > > used the standing model and then drove the pelvisThorax
angle.But its
> > > the angle between pelvis and Thorax and i need the flexion in
Lumber
> > > Spine.How i can relate the Flexion of Thoracic Spine with Lumber
> > > Spine if i have pelvisThrox angel of -60 degree?a
> > >
> > > 2.In SeatedHuman Model,when i changed the pelvisThorax angle to -20
> > > degree,firstly it there was flexion but when i run the
InverseDynamic
> > > Analysis it came back again in sitting position and the Forces were
> > > same like i have in the Seated Model.
> > >
> > > 3.Can you tell me is there contact between Spine and Back of the
cahir
> > > in the SeatedModel and if there is contact then what is the
> > > coefficient of friction?
> > >
> > > With best regards.
> > >
> > > Iqbal
> > >
> > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> ps.com,
> > > “AnyBody Support” <support@>
> > >
> > > wrote:
> > > >
> > > > Hi Iqbal
> > > >
> > > > Even if the Mannequin.any are the same it is not certain that the
> > > > postures are the same, I will try to exaplin why:
> > > >
> > > > The standing model is driven only partly by the settings in the
> > > > Mannequin.any file, the freeposture model is driven 100% by the
> > > > mannequin.any file. In the standing model there is as i recall
it a
> > > > center of mass driver that ensures that the center of mass of the
> > > > entire model is placed above the ankles.
> > > >
> > > > The angles in the Mannequin.any file is used at load time to set
> the
> > > > initial positions and for driving some of the dof in the model
once
> > > > you run the kinematic analysis.
> > > >
> > > > To calculate the forces for a standing positon in flexion i would
> > > > use the standing model and then drive the pelvisThorax angle to
> > > > obtain the wanted postures of the spine and read out the
> compression
> > > > forces as the values i mentioned in a previous answer.
> > > >
> > > > If you want to the same for a seated person i would start
using the
> > > > SeatedHuman model. This is a seated person with the proper
boundary
> > > > conditions.
> > > >
> > > > I hope this helps you move on otherwise please write again.
> > > >
> > > > Best regards
> > > > Søren, AnyBody Support
> > > >
> > > >
> > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > “javed377” <javed377@> wrote:
> > > > >
> > > > > Hello Soren,
> > > > >
> > > > > Thanks for your guidance.
> > > > > Firslty As you told that posture have large effect on Reaction
> > > > > foreces,i have check too.But i have checked with FreePosture
> model
> > > > and
> > > > > Standing Model,they have difference of about 100N with every
thing
> > > > > same in Mannequin.any file,even i changed the load equal to
> zero in
> > > > > Standing Model.
> > > > > Please let me know what the reasons may be.
> > > > >
> > > > > Seconly, i want to calculate the Forces with the
> > > > Flexion,Compression
> > > > > and Lateral Flexion of Lumber Spine in standing position.Can
you
> > > > tell
> > > > > me how to do it?
> > > > >
> > > > > Thirdly,the same forces i want to calculate in sitting
> postion.Can
> > > > you
> > > > > tell me how to add a support(like Chair)in the Model.
> > > > >
> > > > > What you suggest should i use FreePosture or Standing Model
> for the
> > > > > above purposes?
> > > > >
> > > > > With best regards.
> > > > >
> > > > > Iqbal
> > > > >
> > > > > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com,
> > > “AnyBody Support” <support@>
> > > > wrote:
> > > > > >
> > > > > > Hi Iqbal
> > > > > >
> > > > > >
> > > > > >
> > > > > > I think this difference may originate from the differences
> in the
> > > > > posture.
> > > > > >
> > > > > >
> > > > > >
> > > > > > If the angle of the pelvis is different in the two models it
> will
> > > > > have a big
> > > > > > impact on the model, if the pelvis is tilted more backward
> in the
> > > > > standing
> > > > > > model it may have the result you list. Also the posture of
the
> > > > arms will
> > > > > > have an influence on the result, so in order to compare the
> > > > results
> > > > > these
> > > > > > should also be the same.
> > > > > >
> > > > > >
> > > > > >
> > > > > > In the standing model there might also be a load applied
in the
> > > > > > Mannequin.any file, please check the last section of the
> > > > > mannequin.any for
> > > > > > this, it may also have an impact in the results.
> > > > > >
> > > > > >
> > > > > >
> > > > > > I hope this helps you move on, otherwise please ask again.
> > > > > >
> > > > > >
> > > > > >
> > > > > > Have a nice weekend
> > > > > >
> > > > > >
> > > > > >
> > > > > > Best regards
> > > > > >
> > > > > > Søren, AnyBody Support
> > > > > >
> > > > > >
> > > > > >
> > > > > > _____
> > > > > >
> > > > > > From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com
> > > > [mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com]
> > > > > On Behalf
> > > > > > Of javed377
> > > > > > Sent: 26 October 2007 12:10
> > > > > > To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com>
> > ps.com
> > > > > > Subject: [AnyScript] Re: Section Forces in Spine
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Hi Soren,
> > > > > > Thank you very much for your guidance.
> > > > > > Now i have checked the rection force which are about 1400N
with
> > > > > > FreePosture model. But when i changed the posture like in
> > > > standing
> > > > > > model we have,i mean i changed the values in Mannequin.any of
> > > > > > FreePosture to values as we have in Mannequin.any of Standing
> > > > model.
> > > > > > I got the force of 500N.
> > > > > > Can you tell me what are the reasons may be? as i think with
> > > > changing
> > > > > > the posture it should not be so big difference because we
have
> > > > same
> > > > > > loading conditions etc.
> > > > > >
> > > > > > Thanks in advance.
> > > > > > and have a nice week end.
> > > > > >
> > > > > > Iqbal
> > > > > >
> > > > > > — In anyscript@yahoogrou
<mailto:anyscript%40yahoogroups.com>
> > > > ps.com,
> > > > > > “AnyBody Support” <support@> wrote:
> > > > > > >
> > > > > > > Hi Iqbal
> > > > > > >
> > > > > > > I think it will be best to use the FreePostureModel,
this can
> > > > be
> > > > > > > controlled by the Mannequin.any file.
> > > > > > >
> > > > > > > If you look at the following output
> > > > > > >
> > > >
> Main.Study.Output.Model.HumanModel.Trunk.JointsLumbar.T12L1Jnt.Constr
> > > > > > > aints.Reaction.Fout
> > > > > > >
> > > > > > > You will get the reaction forces in the joint comming from
> the
> > > > > > > external loads and the muscle contractions.
> > > > > > >
> > > > > > > In the same manner you can also look at the other joints in
> > > > the
> > > > > > > lumbar region.
> > > > > > >
> > > > > > > One more thing the FreepostureModel comes default, as a
model
> > > > with
> > > > > > > no muscles, changing the include statement will from
> > > > > > >
> > > > > > >
> > > > #include
“…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel_N
> > > > > > > oMuscles.any”
> > > > > > >
> > > > > > > to
> > > > > > >
> > > > > > >
> > > > #include
“…\BRep\Aalborg\BodyModels\FullBodyModel\BodyModel.a
> > > > > > > ny”
> > > > > > >
> > > > > > >
> > > > > > > this will let you get the reaction forces.
> > > > > > >
> > > > > > >
> > > > > > > Please do not hesitate to ask again if you have further
> > > > questions.
> > > > > > >
> > > > > > > Best regards
> > > > > > > Søren, AnyBody Support
> > > > > > >
> > > > > > > —In anyscript@yahoogrou
> <mailto:anyscript%40yahoogroups.com>
> > > > ps.com,
> > > > > > “javed377” <javed377@> wrote:
> > > > > > > >
> > > > > > > >
> > > > > > > > Hello to every one,
> > > > > > > >
> > > > > > > > Can any one tell me how to calucualte section forces
> between
> > > > Th12
> > > > > > > and
> > > > > > > > L1 in spine model for Zero degree inlcination? My final
> goal
> > > > is to
> > > > > > > > calculate the section forces in anybody spine model
between
> > > > Th12
> > > > > > > and L1
> > > > > > > > for different positions.
> > > > > > > >
> > > > > > > > with best regards.
> > > > > > > >
> > > > > > > > Iqbal
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
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> > >
> > >
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