Ergonomic Chair

Main Forum
1

Hi,

I recently started on my first project. The goal is to study the reactionforces in the joints while sitting in an ergonomic chair.
I started from the model: SeatedHumanFullWithNeck.any.

The first thing I did was move the supportnode of the shank from the posterior to the anterior side of the shank.

LegrestSupport.any:
AnyFolder &ShankR = …HumanModel.Right.Leg.Seg.Shank;
ShankR={
AnyRefNode SupportNode = {
//sRel = {-0.05000, -0.1000, -0.028000}; Original Coordinates
sRel = {0.05000, 0.000, -0.028000};

  AnyDrawNode DrwNode = {
    RGB = {1, 0, 0};
    ScaleXYZ = {0.015, 0.015, 0.015};
  };
};

};
AnyFolder ShankSupportR = {
AnyRefFrame &BaseObject =…EnvironmentModel.Seg.LegRest;
AnyRefFrame &TargetObject = …HumanModel.Right.Leg.Seg.Shank.SupportNode;
};

The next step was to change the initial position of the legrest.

RefPM.Seg.LegRest.r0 = {Dim.SeatLength +0.20, -(Dim.BackRestHeight+1/4*Dim.LegRestLength), 0};
RefPM.Seg.LegRest.Axes0 = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}};

After running the model, the legrest is in the right position but there is no sign of any contactforces between the leg and the support.

Did I miss any steps? Do I need to redefine the surfacecontact between the shank and the legrest? If so, where can I do this?

Thanks in advance,
Sam Huybrechts