Hi Pros,

I am trying to figure out how to simulate a torsional spring to simulate a torsion spring axle.  In reality, a square shaft is sandwiched in a square tube with ruber in the corners of the tube.  Does anyone have any ideas on how to simulate this?  I have seen in the help files, that a torsional spring can connect two verticies.  How can you connect it to the center of a square, or round, shaft?

I am using Simulation 2011 Premium.

Thanks in advance for any help.

Jody