very interesting problem.
If you modeled your frame as structural members everything will be considered as beam elements. I'm not sure you can treat beams as rigid bodies.
It works for sure with solid mesh: all you need to do is right clicking on a body in the simulation tree and choose " make rigid".
In your case, if you want to use beams and considerazione them ad rigid you might define a custom material with very high young modulus (2 e+6 or 2e+7 MPa).
Spring connectors can't be user with beams but only with solids and shells, you will have to find a workaround with mixed meshing.
Another option would be modeling the cables as beams and make them trusses. Problem is that trusses resist compression: you would need to go non linear then and define a custom material that would resist only tension.
Thank you very much for the help!
I took your advice and re-modeled the system with structural members and found the resultant forces. I accounted for the tension/compression issue by not fixing the cables that I assumed would be in compression.
Here is the simulation for the "centered load" scenario, where the basket load is centered:
This is an easy problem to solve by hand, so I was able to compare my results. The results were very close! 520lbs vs 620lbs.
The problem is that the fixed ends of the cables create moments on the structure. I tried setting the cable materials to very flexible (elastic modulus 10000) but this crashes solidworks so I had to settle for 5000 series aluminum (modulus 7e+10).
Is there some way to constrain the fixed joints in a single direction? So they produce no moment?
in you RMB up in the parts area you will be able to set the end DOF for the member.
RMB=right mouse button
Yes I was suggesting releasing the degree of freedom. You could try changing them to truss elements but in my experience it just makes the program crash. A truss is a essentially two force member - no moments.
You could do this easy enough in GEOSTAR if you have the Premium simulation license but it is a pretty old school sort of program so figuring it out is a bit of a challenge. You would not find a lot of help but there are a few souls out there that know some of how it works. I am not one of them as the last time i used it was in say the early 2000's. But I know it could do this problem with fidelity with beams and springs.