Global Mesh Refinement (Mesh Study Wizard) and Nastran Solver?

[bryan_mcnatt]

I've got a SSLM model that I solved using the Nastran solver.  I'm contemplating setting up a Global Mesh Refinement to check the results for convergence.  However, I can't find any explicit mention in the Help that the Wizard works with the Nastran solver as well as the SimMech solver.  Since there's no option in the Wizard to specify which solver to use, does it use the solver originally used for the DS or would it default to the SimMech solver?  The model I've constructed won't run with the SimMech solver the way I have it set up.  I'll have to change my base model and re-run with SimMech solver and I'm trying to avoid doing that.

[John_Holtz]

Hi b....

It appears to me that the selection of the solver (Sim Mech or Nastran) is not stored in the model. Therefore, the mesh wizard does not have a way to know that the model was last analyzed with Nastran. And as you point out, the wizard itself does not give the user the option to choose the Sim Mech solver versus the Nastran solver.

So I am confident that the mesh wizard is designed to run the Sim Mech solver.

Out of curiosity, what is in the model that prevents it from running with the Sim Mech solvers?

[bryan_mcnatt]

Thanks John.

As for Why Nastran not SimMech?  My model could be run in SimMech but I ran it first in Nastran.  I probably could (and will) run it in SimMech now too without changing much or anything.  The model had been cranky in getting it to solve, even in Nastran.  One of the last things I did before finally getting it to run in Nastran was I changed the default contact from Bonded to Welded.  I thought both would map to Welded in Nastran and shouldn't have mattered.  But, maybe it does? or maybe I changed a couple of things in that last effort, not just the default contact, and I'm crediting the success to the wrong change?  Anyway, it runs now and I can get on with finishing.

Thanks again for looking into my question.

[bryan_mcnatt]

Actually, I meshed without matching meshes so to run with SimMech will require a re-meshing or specifying contacts and that is what I was hoping to avoid.

[Sualp.Ozel · Accepted solution]

the mesh study wizard DOES work with Nastran.

Simply make sure that the Nastran solver is your default processor in "Tools: Applications options : Processors" for the analysis type you are trying to use the Mesh Study Wizard with

-Sualp

[bryan_mcnatt]

Didn't think of that. Thanks Sualp!