Which constraint should I use on my FEA?

[Henry26]

Hello everyone!

I'm performing a finite element analysis with a pair of gears and another component around this pair of gears. This system is named as "planetary gears". My model is simplified, just to see how will be the behavior of the system, I'm using the software Hypermesh with the solver OptiStruct. My question is, which degrees of freedom on "FACE 1" and "FACE 2" should I constraint to rotate "GEAR A" and "GEAR B" around the axis X.

Degres of freedom:
Displacement: x, y and z
Rotation: x, y and z

I have attached the picture.

https://files.engineering.com/getfi...2743-4acb-a300-98db0382930f&file=Rotation.JPG

Thanks so much in advance.
Henry