Boundary Conditions & Constraints
Altair EmployeeHello,
I am trying to run a Linear Static Analysis of a huge assembly. I have 4 ISO Corners at the bottom. I have 2d meshed it (Simplified Geometry : Quad4 Elements only). When i fix the bottom face only of all the four ISO corners and run my simulation i get unsatisfactory results. By unsatisfactory i mean significantly high stresses and displacements.
But when i create a RBE2 on each of the 4 individual ISO Corners (i.e 4 RBE2's) and apply constraint/SPC (All 6-DOFs FIXED) to those 4 RBE2s master node, i get satisfactory results. Could anyone explain why this contrasting results or mismatch?
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Altair EmployeeKindly check your Dropbox for the images.
Altair EmployeeAny Updates???
Second approach with RBE2 fixed with all dof is recommended.Please request FEA ebook using below link.In page no 386 of ebook we talk about bracket analysis with and without rigid element.
Altair Employeesorry but i couldn't locate it, could you please elaborate. Thanks
Altair Employee <?xml version="1.0" encoding="UTF-8"?>
This is what i could see on pg 386 and a few videos to follow up of a bracket.
Please refer chapter 13 of the ebook.Or simply search with keyword as bracket in the pdf.
Can you share the screenshot of both the cases(with RBE2 and without RBE2 )?