Hello Mr. Newman,
Thank you for your reply.
1) Replacing the spherical joints with the Universal joint prevented the Y axis rotation. Thank you for the suggestion. The Reference coordinate system worked on its own to match the coordinate axes perfectly.
2) Adding a frictional contact still results in the solution being unsolved. We can add only a forced frictional contact in the RBD solver. Also, I couldn't add a contact tool in the RBD. So, I couldn't check the initial status.
I tried with a friction coefficient of 0.1 and a Pinball radius of 0.2. There was no solution in this case and from the Solution info I got the following warning
None of the LCP solvers succeeded, Abort computation.
No set of active contact stops can satisfy all the constraint equations. Solve cannot proceed
Error found at time 1.377963e-04
Solution terminated before normal completion
I got the same error with a Pinball radius of 0.5 as well.
When I increase the friction coefficient slightly to 0.15, keeping the pinball radius the same, I get multiple warning messages and the solver fails.
No node exists for the spring mesh reference: Left Spring.
No element exists for the spring mesh reference: Left Spring. Results cannot be evaluated for this spring.
No node exists for the spring mesh reference: Far Spring.
No element exists for the spring mesh reference: Far Spring. Results cannot be evaluated for this spring.
At this point I still don't know how to prevent the springs and spherical joint from penetrating into other surfaces during the dynamic analysis' last steps.
Also, I wanted to ask you which RBD software do you use or recommend if ANSYS RBD is not the way to go?