making model and muscle overload

Main Forum
1

Hi, AnyBody supporters

I have two questions.
First, I can put the bicycle、wheelchair into the model from the repository,
so can I make a fitness machine myself by using Auto CAD?
If not, what other softwares can I use?
Then, what should I take notice of when modeling it, length、Mass or something else?

Second, if I have an experiment with athlete, then I will have an athlete model, so if I should modify the value of the model muscle, or it will overloading all the time.
So where can I modify it?
Besides, if I have an old man model, maybe I shoule modify the muscle value less than the present value.
Finally, how can I know what value should I modify?

Thank you very much
Best regards,
Yeh

2

Hi Yeh,

CAD geometries can be imported into AMS using the STL format, which most CAD systems can export.

This will handle the geometry but not the mass properties etc. these has to be set by the user, in the segment.

We have a SolidWorks to AnyScript converter which can handle both geometry, mass properties constraints etc, but it will only work through SolidWorks, not AUTOCAD.

The quickest way to modify the strength of the person is to alter the strength parameters which are typically listed in the main file… These numbers are multipliers on the muscle strength.

 
AnyFolder StrengthParameters={
AnyVar SpecificMuscleTensionSpine= 90; //N/cm^2
AnyVar StrengthIndexLeg= 1; 
AnyVar SpecificMuscleTensionShoulderArm= 90; //N/cm^2
};

If these number are increased lets say by 20% the model will be 20% stronger.

Best regards
Søren

3

Hi, Søren

Thanks for the information of softwares first.

so like the following code, I have some questions.

AnyFolder StrengthParameters={
      AnyVar SpecificMuscleTensionSpine= 90; //N/cm^2
      AnyVar StrengthIndexLeg= 1; 
      AnyVar SpecificMuscleTensionShoulderArm= 90; //N/cm^2
    };

What’s the 90 (N/cm^2) means?
And is the code means to alter the strength of Spine, Leg, Arm at the three following rows?
But why the leg’s strength has a different value(uint)?
Last, how much should we alter ? if it is depends on the person’s maximal voluntary contraction ?

Thanks again,
Best regards,
Yeh

4

Hi Yeh,

90 N/cm^2 is the max stress pr area of the muscle, this is multiplied onto the cross sectional muscle area.

The leg model are using an index value no with no unit, this is due to the way the original data was avaible.

It is difficult to know how much to alter it, this will depends on the strength of the person, but if you beef it up by 20% all F0 values of the muscles will be increased 20%.

Best regards
Søren