Modeling and parameter revising method of rigid-flexible coupling dynamics model

Virtual prototype technology has been widely applied to simulate the performance of various complex mechanical systems. However, errors existing in analysis models usually cannot be ignored, particularly rigid-flexible coupling dynamics model, so many parameters factors have to be considered and to be improved. In this paper, taking a multi-body impact system as the subject investigated, a rigid-flexible coupling virtual prototype model of the multi-body impact system is built by using the multi-body dynamics software Virtual Lab. The simulation and analysis of the impact dynamics model is presented. The accuracy of the simulation results is evaluated by combining with test data. Some key system parameters are analyzed and revised base on the sensitivity method and the perturbation method. The scatter degree of the simulation results of the revised impact dynamics model has better consistency with the test results, and the validity of the virtual prototype model is improved.