Identifying parameters of multi-degree-of-freedom nonlinear structural dynamic systems using linear time periodic approximations
We extend a new nonlinear identification method to multi-degree-of-freedom systems. A method is developed to extract the original multi-DOF nonlinear system. A set of tools is developed to verify the identified models. The method is applied to simulated measurements of a nonlinear beam model. The method is applied to identify a model of an experimental nonlinear beam.
identification nonlinear time periodic restoring forces