Hello, I have an issue regarding the analysis of multilayer shell with same material. The multilayer structure to be analyzed consists of a hollow cylinder with some thickness and sheet metal is to be rolled around it. A simple cross-section demonstration: _______________________ xxxxxxxxxxxxxxxxxxxxxxxxxx -------------------------- XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX ______________________ --- : contact X/x : cylinder/sheet metal with same material My question is, how do I model this in ANSYS/Nastran - which element type or specific analysis (if there is)- so that it will recognize them as different structures instead of one body with total thickness? The purpose of this study is to get frequency response characteristics with different scenarios. Any help is greatly appreciated.