Joint Reaction and Contact Forces

[Erin Bill]

Rahul,
In the GUI tool-->Analyze Analysis tab, add Joint Reaction, select in in the list and select Edit. Expand the "express in Frame" folder , it says "ground" ( next to the red x). Click in the cell and change it to parent or child. Make sure that you then click back on the "express in frame" Cell and see the setting changes to Parent or child, otherwise it defaults back to ground.
Hope this helps.
Erin

[Ajay Sonar]

Hi all,

How do I calculate the joint contact loads from the estimated muscle forces? Is it the same as the joint reaction forces calculated by the joint reaction analysis. If not does anyone know or have an example of how to do this.

Thanks,
Ajay

[Sylvia Wan]

Hi,

I obtained a sto file from ID which only has columns labels as moment of each joint. However, when they are plotted against time, it does not give moment curve.

From my previous understanding, ID generates joint forces and joint moments. Why does it only give moment columns in the sto file? Could they be joint forces instead?

As a side, is it too early at this stage to analyse the output data since some users tried to analyse joint reaction force after static optimisation.

Thank you. Please help.

Sylvia

[Adriana Jorge]

Hi Tim,

I know it has been a long time since you posted this, but I'm trying to do a Joint Reaction Analysis and I'm having the exact same issue you described. Do you remember how you solve it?

Thank you,
Adriana