文档介绍：
多体系统动力学弹性碰撞的实验研究#
吴坛辉,洪嘉振,刘铸永**
(上海交通大学船舶海洋与建筑工程学院,上海 200240)
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摘要:碰撞是高度非线性的动力学过程,要得到可靠的实验结果,必需有高性能的实验装置
以及合理的实验方案。本文设计了柔性多体系统的碰撞实验,在弹性碰撞范围内以实验为基
础,就以下几个方面展开研究,不同碰撞初速度对碰撞动力学的影响,不同几何构形对碰撞
动力学的影响,不同的拓扑构形对碰撞动力学的影响。研究表明不同的初速度影响碰撞力大
小,不影响接触时间,几何构形对碰撞的影响较大;铰约束的影响较小。对实验数据进行分
析并与弹性波理论进行相互验证,最后通过仿真数据与实验进行对比,说明实验数据可靠,
实验手段可行,为进一步的研究提供经验与技巧。
关键词:多体系统动力学;碰撞动力学;实验
中图分类号:
The Experiment Research of Elastic Impact Dynamics in
Multi-body System
Wu Tanhui, Hong Jiazhen, Liu Zhuyong
(School of Naval Architecture, Ocean & Civil Engineering, ShangHai Jiao Tong University,
ShangHai 200240)
Abstract: Contact-impact of multibody system is a highly nonlinear dynamic behavior. Believable
experiment results couldn't be obtained without advanced equipments and suitable research
methods. In this paper, an elastic impact experiment of flexible multibody system has been
discussed. The effect of variation of parameters on impact dynamics is conducted, includes: (1)
the variation of initial velocity; (2) the variation of geometrical configuration; (3) the variation of
topology configuration. Experimental results indicate that: (1) the changing of initial velocity only
affects the value of impact force and no effect on contact time; (2) the changing of geometrical
configuration could strongly affect the experiment result and (3) the changing of bea