I'm experiencing a problem simulating a torsional restraint
while allowing radial deflection in a cantilevered shaft with an
overhung load. I've selected the cylindrical surface restraint and
only selected a circumferential restraint. The radial direction
deflection results are one or two orders of magnitude smaller than
expected. Any advice on this matter?\
It sounds as if maybe the entire shaft is restrained
circumferentially? If so, and it is overhung, it cannot deflect
radially and remain circumferential.
Try retraining just the one end of the shaft, either by fixing the
non-overhung end, or by creating a short surface, if it does not
exist already, at the non-overhung end and applying the cylindrical
surface contraint there.