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Need an FEA on just one sub-assembly

Question asked by William Finch on Jun 9, 2016
Latest reply on Jun 10, 2016 by Jim Riddell

Okay, here goes....


I have a Main Assembly that contains several sub-assemblies, including Sub-Assembly-A.  The components of Sub-Assembly-A are mostly mated, and immovable.  However, a few degrees of freedom remain.  They are fixed by mating component faces to faces of other components in Main Assembly.  These mates determine the final geometry of everything.


Now, I need to do an FEA on JUST Sub-Assembly-A to make sure the loads are low enough.  However, the geometry imposed by Main Assembly is important.  If I try to analyze Sub-Assembly-A, the geometry might not be correct because some parts can move.


So, how do I "fix" the geometry imposed by Main Assembly and do the FEA on just Sub-Assembly-A?  It must be straightforward, but I'm just not seeing it.


Thanks in advance!