Is it possible to obtain normal modes of a cavity by considering the effect of flexibility of surrounding structure in NX Nastran (we have flexible boundary condition)? For example the cavity of a vehicle surrounded by different panels...
Yes. See the articles on coupling in the Advanced Dynamic Analysis User's Guide and the Acoustics User’s Guide
Is it possible to give me a clear address? i didn't find any proper answer to my question by searching those documents. i want to run a sol 103 on a cavity by cosidering flexible boundary. thanks