一种基于变恢复系数的接触碰撞力模型  

A contact-impact force model based on variable recovery coefficient

作　　者：王旭鹏[1] 张艳[1] 吉晓民[1] 马尚君[2] 佟瑞庭[2] WANG Xupeng;ZHANG Yan;JI Xiaomin;MA Shangjun;TONG Ruiting(Department of Industrial Design,Xi’an University of Technology,Xi’an 710048,China;Shaanxi Provincial Engineering Lab for Transmissions and Controls,NorthwesternPolytechnic University,Xi’an 710072,China)

机构地区：[1]西安理工大学工业设计系,西安710048 [2]西北工业大学陕西省机电传动与控制工程实验室,西安710072

出　　处：《振动与冲击》2019年第5期198-202,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51275423;51505381);陕西省教育厅自然科学基金资助项目(17JK0551);西安理工大学博士启动基金资助项目(106-451117002)

摘　　要：为了有效描述机械系统中的接触-碰撞现象,在考虑材料屈服强度和初始碰撞速度的基础上,提出一种变恢复系数模型,进而建立了一种改进的、变恢复系数的接触-碰撞模型;随后,分别以轴-轴承、球-球以及平面曲柄滑块机构为例,通过大量数值模拟和实验测试,以及二者间的对比分析,对改进模型的有效性、准确性进行了验证。研究结果表明,改进的模型能够更加准确的描述间隙铰链处的接触碰撞效应,以及间隙铰链对机械系统动态特性的影响规律。In order to effectively describe contact-impact phenomena in mechanical systems,an improved contact-impact force model based on variable recovery coefficient was proposed.The variable recovery coefficient model was proposed considering material yield strength and initial impact velocity.Then,taking shaft-bearing,sphere-sphere,and a planar crank-slider mechanism as examples,a great number of numerical simulations and test measurements and their contrastive analyses were used to verify the correctness and effectiveness of the improved model.The results showed that the improved model can more accurately describe contact-impact effects in clearance joints and the influence law of clearance joints on dynamic characteristics of mechanical systems.

关 键 词：变恢复系数 接触碰撞力模型 间隙铰链 动态特性 

分 类 号：O313.4[理学—一般力学与力学基础]