Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : August 07, 2016 - August 10, 2016
An efficient formulation based on component mode synthesis method and penalty method is presented to investigate the contact-impact of flexible multi-body system. Generally, the Hertzian contact law is the most commonly used method in engineering applications. However, the Hertzian contact theory is restricted to smooth and continuous surfaces. In addition to Hertzian contact law, Lagrange method and penalty method are commonly used for contact-impact analysis. However, by using nonlinear finite element method, a tremendous number of degrees of freedom in the contact-impact problems will increase the time cost significantly. With the consideration of these two problems, a formulation combining the component mode synthesis method and the penalty method is presented to investigate the contact-impact problems of flexible multi-body system numerically. Based on the component mode synthesis technique, a flexible body is divided into two parts: the contact zone and the non-contact zone. For the non-contact zone, by using the fixed-interface substructure method for reference, a few low-order modal coordinates are used to replace the nodal coordinates of the nodes, and meanwhile, the nodal coordinates of the local impact region are kept.
