柔性圆柱杆接触碰撞实验研究  

EXPERIMENTAL STUDY ON FLEXIBLE CYLINDER RODS IMPACTS

作　　者：朱焜[1] 洪嘉振[1] 董富祥[1] 余征跃[1] 

机构地区：[1]上海交通大学工程力学系,上海200240

出　　处：《动力学与控制学报》2009年第2期125-128,共4页Journal of Dynamics and Control

基　　金：国家自然科学基金资助项目(10772113)~~

摘　　要：对两柔性圆柱铝杆纵向接触碰撞进行实验研究。为了深入研究接触碰撞过程中物体的动力学响应,设计了柔性体之间接触碰撞的实验方案,利用铝的导电性精确地测量碰撞的接触时间,利用激光多普勒测振仪非接触地测量接触碰撞过程中柔性杆上各点的速度响应,同时通过动态应变技术测量出接触点附近的应变变化历程。实验结果揭示了碰撞过程中杆上各点速度响应形成弹性波的现象,说明碰撞过程中弹性波传播效应不能忽略。并验证了实验方案的可行性和合理性。The experimental research of the longitudinal impact between two flexible cylinder rods was investigated. In order to study the dynamics response during the contact process, the experiment setup of the impacts between two flexible bodies was designed, the contact duration was accurately measured according to the conductivity of aluminum, and the non - contact measurement for the velocity response of the flexible rod during the impact process was non - contact measured by the Laser Doppler Vibrometer. Furthermore the strain at the point near the contact region was implemented by the dynamic strain amplifier. The wave propagation in the flexible rod was revealed through the research. The feasibility and rationality of the experiment setup was verified.

关 键 词：柔性杆 纵向碰撞 接触动力学 实验 弹性波 

分 类 号：O313.4[理学—一般力学与力学基础]