New Method for Dynamics Modeling and Simulation of Flexible Multibody System

High-efficient precise dynamics analysis for a general flexible multibody system has become a research focus in the filed of flexible multibody dynamics. In this paper, a new method is presented, which combining discrete time transfer matrix method of multibody system and finite element method. The new state vectors of flexible body are defined, and its new transfer equation and transfer matrix are deduced. The discrete time transfer matrix method of multibody system is extended to study general flexible multibody dynamics. The proposed method combines the modeling flexibility of transfer matrix method and applicability for complex anomalistic structure of finite element method. It doesn't need global dynamics equations of a system and has the low order of system matrix, high computational efficiency. Formulations of the proposed method as well as numerical example of a multi-rigid-flexible-body system including anomalistic flexible component are given to validate the method.