I want to model pall friction damper in Perform 3D. What's your suggestion for element and method of modeling? Can you help me
Since there is no exact information about this procedure, I recommend checking the official Tutorials presented by the developers of the application. They will teach you about the software's functionality and present with ways and methods to perform modelling.
Video tutorials page: http://www.csiamerica.com/products/perform-3d/watch-and-learn