含接触碰撞的变拓扑系统动力学仿真  

Dynamic Simulation of Multibody System with Variable Topology

作　　者：盛秋峰[1] 洪嘉振[1] 刘铸永[1] 李剑[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2008年第8期1233-1237,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(10372057);教育部博士点基金资助项目(20040248013)

摘　　要：利用计算多体系统动力学理论对变拓扑系统进行建模,引入拓扑切换条件解决以接触碰撞为特征的多刚体系统动力学的变拓扑问题,实现变拓扑系统的连续仿真.同时,考虑到复杂机械系统中存在着多处的机构干涉和限制,提出了多体系统的接触碰撞模型,研究了多体系统接触碰撞的处理方法,得出了一种有效碰撞点的近似计算方法.Dynamic modeling about system with variable topology was presented by use of theory of computational dynamics of multibody system. Continuous simulation was achieved through topology-switchingcondition. Since there exist a lot of interruptions and restrictions in such a complicated system, contact-impact will usually occur in the course of motion. Thus, contact-impact model was introduced to deal with this kind of contact-impact problems appearing in multibody system. In the meantime, a kind of approximate method of impact points＇ searching was presented, and the efficiency of this kind of method was also proved through numerical example.

关 键 词：多体系统 变拓扑 接触碰撞 

分 类 号：O313.7[理学—一般力学与力学基础]