[ramintk]

Hello everyone,

I am trying to perform a finite element method (FEM) simulation of von Mises stress for a rotor of a permanent magnet synchronous motor (PMSM) in Ansys Mechanical. I have completed the static structural setup, but I am encountering the following error:

"Not enough constraints appear to be applied to prevent rigid body motion. This may lead to solution warnings or errors. Check results carefully." I also deleted the automatic connection, inserted the connection group as a joint, and then created a new automatic connection. However, the error did not go away.

I have attached some pictures of my setup details for your reference. Any help would be greatly appreciated. https://drive.google.com/drive/folde...do0OqyEBa-KaLx

Untitled.jpg

[evcelica]

You did not constrain or define all 6 Degrees of freedom. Looks like your model is not constrained in the Z (axial) direction, which would allow to rigid body motion.

[NickS]

Hello,

One thing I've discovered while struggling with Ansys: sometimes, a little detail like a misapplied constraint can screw things up. Pro tip: send an email to Ansys technical support with a detailed description of your problem. They're super responsive and can often spot what's going wrong.

[Martin_Sz]

try to glue most parts where are bonded connections and review Ur BC's . Your rotor want to fly to the cosmic ethernal You have not enough suppoorts on Ur model

[Martin_Sz]

Try to pass these tips in the link below
https://howtooansys.blogspot.com/202...ot-enough.html

[dhein]

Are all bodies bonded via contact or shared topology?

Is it right, that only the shaft is supported frictionless? Are here also the end faces supported?