I have some problems with my Nastran simulations. I want to lock the bearing seats of my assembly. So i used a 1D Connection to connect the bearing surface with an rbe2 element to a point in the middle. Now i locked dof 1 and 3 on that point. I applied some loads but the bearing seat can still move. What am I doing wrong?
Thanks for your help
I would agree with @jon_morga. Fixing X and Z at the centerline grid will prevent translation, but not rotation. The deformations and the contour distribution sure look like a rotation to me.
Even if the rotation is fixed by the left component, there is bending in the legs that connect the middle disk to the right disk, sothe right-most piece is rotating with respect to the fixed flange.
Thanks for your help! I didn't read you answers correctly. You are right with your opinion about rotation. It should be able to rotate there. I was concerned about the expanding.
The "expansion" is a different issue. This is due to the fact that you are running a linear analysis. This means that the model (nodal coordinates, load directions, etc.) is not updated with nodal displacements. This is a good assumption for small displacement analysis.
If you truly have large displacements and need the model to update with displacements, you need to run a geometric nonlinear (large displacement) analysis.