Reply To: Seeking Advice on FEM Analysis for Bike Frame Model in Ansys

[peteroznewman]

A better support for the front tube of the frame is a Remote Displacement scoped to the short tube. In the Details window, there are some global coordinates that represent the center of that short tube.  Edit the numbers so that the X and Y values are the global coodinates of the front wheel axle. That is some distance in front of the short tube along the X axis and has the same Y coordinate as the rear axle. For the 6 constraints, if you are working on a symmetry model, 3 Degrees of Freedom (DOF) have been supported by symmetry. The rear axle supports 1 DOF (Y=0) so the front axle Remote Displacement only needs X=0 and Y=0 and leave the others Free.  This will allow the front tube to rotate about the front axle as the load is applied to the seat or the pedal axle.

If you are doing a 3D model without symmetry, then you need that Remote Displacement to also have Z=0, Rx = 0 and Ry = 0 in addition to what I said above.