Learning Forum

[markfea]

I have 1/10 rotor segment of an IPM electric motor and I want to simulate pressure load resulting from an interference fit on the inner cylindrical surface and centrifugal force from the rotor rotating with 18000 rpm.

This is how I've set up the model:

[Rahul Kumbhar]

You should have constraint in radial direction as some place to avoid rigid motion in that direction. May be you can constraint outer surface in radial direction. Since the magnets are glued to the rotor, bonded contacts are correct choice.n

[markfea]

That would solve the problem, but it doesn't make sense since the outer surface has to be able to deform radially. Thanks for the contacts advice. n

[peteroznewman]

nI often see the Warning on properly constrained models. You can ignore the warning if the results look reasonable.nThe two Frictionless Supports on the radial cut faces create an overall radial constraint on the whole sector because they have an angle between them.n