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柔性梁线接触碰撞的动力学建模和实验研究
引用本文:沈凌杰,郭其威,刘锦阳,余征跃.柔性梁线接触碰撞的动力学建模和实验研究[J].动力学与控制学报,2007,5(2):147-152.
作者姓名:沈凌杰  郭其威  刘锦阳  余征跃
作者单位:1. 上海交通大学工程力学系,上海,200030
2. 上海宇航系统工程研究所,上海,201108
基金项目:国家自然科学基金 , 教育部留学回国人员科研启动基金
摘    要:研究作旋转运动的柔性梁的线接触正碰撞问题.基于Goldsmith的线接触撞击力模型,分别用基于小变形的混合坐标法和基于大变形的绝对坐标法建立了柔性梁的动力学方程,考虑了几何非线性效应.在此基础上,进一步考虑非线性阻尼项的影响,将Hunt,Crossley的阻尼模型推广到线接触问题.介绍了柔性梁线接触碰撞的实验方法.计算结果显示,在考虑阻尼的情况下,计算结果与实验结果吻合很好.比较了混合坐标法和绝对坐标法的撞击力计算结果,与实验结果对比表明,绝对坐标法更适用于大变形的撞击问题.

关 键 词:柔性梁  几何非线性  线接触正碰撞  阻尼系数  实验
收稿时间:8/3/2006 12:00:00 AM
修稿时间:2006-08-032006-09-02

Dynamic modeling and experiment technique of a flexible beam with cylindrical contact
Shen Lingjie,Guo Qiwei,Liu Jinyang and Yu Zhengyue.Dynamic modeling and experiment technique of a flexible beam with cylindrical contact[J].Journal of Dynamics and Control,2007,5(2):147-152.
Authors:Shen Lingjie  Guo Qiwei  Liu Jinyang and Yu Zhengyue
Affiliation:1.Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200030, China; 2. Shanghai Institute of Astronautic System Engineering, Shanghai 201108, China
Abstract:The cylindrical normal contact between a rotational flexible body and a fixed cylindrical groove was investigated.The impact dynamic equations were established by hybrid coordinate formulation and absolute nodal co-ordinate formulation based on Goldsmith cylindrical contact model,in which geometric nonlinearity was taken into account.Considering the non-linear damping terms,Hunt Crossley damping model was successfully developed to cylindrical contact.Experiment technique for the cylindrical normal contact was introduced.It is shown that the simulation results agree well with the experiment results in the case that the damping effect is taken into account.Furthermore,the impact force obtained by the present absolute nodal co-ordinate formulation was compared with that obtained by hybrid-coordinate formulation,in which small deformation was assumed.Comparison with the experiment results indicates that the present absolute coordinate model is more suitable for calculation of contact-impact with large deformation.
Keywords:flexible beam  geometric nonlinearity  cylindrical normal contact  damping coefficient  experiment
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