Do you care about the shaft or the bearing or the bearing support?
Is the shaft symmetric about the axis?
What is the loading condition you are concerned with?
The reason I ask is because in simulation the closest thing to a rotational load is centrifugal which applies a body load to the part. This is only appropriate for certain problems. Motion can tell you able imbalances at the restraints when rotated.
actually I have the same question and the aim from my analysis to estimate the reaction forces at the bearing area so I can design the bearing arrangement .
my assembly is shaft supported by tow bearing and there's pulley overhang and the shaft is rotating by speed 500 rpm.
I had attached photo for the assembly, I planning to modify the bearing arrangement but I want to find out how I can prove the deference or analyze to show the deference.