Stress simulation on a rotating model

Hi everyone!!

Altough I have been using SW for 3 years I am an absolute noob and incabable of doing anything.

I have to do a motion/simulation analysis on a model and I am stuck. The model is the one in the render and I am trying to do a full stress analysis when the central gear is rotated at 100 rpm or so. I am fine(ish) with the motion and get some useful data. On the other hand, how do you suggest I set up the stress simulation (ie: fixtures/torque/CONTACT??? ) I am trying to learn with the basic model shown but with no success

Thanks a lot!!!!

SolidworksSimulation