what is your doubt? how to actually apply the BC?
i'd recommend separating your 2 analyses
1 a restraint with a value will allow you to create the displacement
2 a restraint with an axis as the reference will allow you to create the rotation
once you get them working independently, you can try to do both at the same time (which could be done with a cylindrical restraint)
to note, this won't be an easy analysis. i'd make sure to go through the tutorials before you attack it.
as for the rod, its up to you on whether you want to include it. but my guess is that you don't need to include it if you really care about the bellows.
Thanks Jared for your immediate reply.
I got the boundary conditions shared by you. Let me check the solutionsand revert back you.
Thanks in advance.