New to simulation- gravity related setup question

Tyler, no worries, we've all sent just the assembly before

Here are a few suggestions:

1.  In the study properties, uncheck the "Large Displacement" option.  Why is this checked and what does it do?  See #2.

2.  When the study tries to solve, it sees there are 'large displacements' and throws the prompt "Excessive displacements detected... would you like to re-run with Large Displacement enable?"  It's tempting to say "Yes" but always say "No" to this prompt.  If you say yes, the solver will re-start with the "Large Displacement" option enabled.  This should be off in this study.  If you say No, the solver will continue to solve using small displacement assumption.  There's a lot of explanation behind it, but suffice to say that "Large displacement" option invokes an iterative solution that takes a lot longer and is a lot more likely to fail when you have a rigid body mode.  So just turn off this option and also turn on Soft Springs.

3.  See picture below.  This is what your results look like after answering "No" to the "Excessive displacement..." prompt.  YOu can see the issue right away, the far panel is loose.  There is nothing bonding it to the other bodies, so it just flies away in space.

4.  You have Global and Component Contact both defined and set to Bonded, however both Global and Component will only apply to components that have initially touching faces.  In your case, you have a lot of edge to edge contact between panels.

5.  To account for these edge-edge contacts, you have a few options:  create local bonded contact sets, use rigid connectors, model in the weld as a solid, use Edge Welds.  Each have their benefits and drawbacks.  The quickest option is the first one but the results in the weld gaps won't be truly accurate.  Sometimes it's an iterative approach - add a few contact sets, re-run, check results and see where it's coming un-glued, repeat - just make sure and say "no" to the large displacement prompt each time so the option doesn't get checked.

I had to add 9 contact sets but then the model was bonded properly:

This is actually a great model to learn on since it doens't have the usual ideal face-face contact.  There are other lessons on this model you could practice too, such as using shell elements to represent the panels.  That will come in handy when you start to run bigger assemblies.  The best thing you could do is invest in the Simulation training class with your local VAR.  You'll cover the different contact types, how to use them, different elements, checking for convergence... so much value and it's worth the time if you're going to be using this tool as part of your process.