Hi @mjmiddle

I have used Frictional contact for hinges, i am just doing static analysis, i am not trying revolute joint.

As with photo attached in last post of modal analysis, you can see complete assembly is moving, and shows zero frequency for first two modes.

I want to know, it means my body is not fixed in relation with ground.

Thus instead of using Fixed Constraint, i should use Fixed Joint constraint, Am i correct in understanding?