Reply To: Rotation velocity in static structural

[peteroznewman]

Notice in the example I showed where there is only one body, it is both Fixed to ground so it can't spin about the axis that was defined using an edge, and also experiences the load it would see as if it was spinning about that axis. Notice that the free end of the body bends away from the axis because the centrifugal forces are pulling each node away from the axis.

In my example with one body, the body is eccentricly positioned relative to the axis of rotation. Imagine that body was bolted to a shaft on the axis of rotation, and that shaft was supported by bearings in a housing fixed to ground. You could apply a Rotational Velocity to the body, shaft and bolts, and they would flex outward and the frame would experience the reaction force at the bearings supporting the shaft, but the frame would statically deflect in the direction the body was being pulled.  This is the limitation of Rotational Velocity, nothing is actually rotating.  In the real world, the eccentric mass rotates so the force on the housing bearings also must rotate. One way to do this is to use a joint load on the shaft of angular position in steps of 15 degrees to look for the worst case stress in the housing for a full 360 degrees of angles of the shaft about its axis.