地铁弓网系统摩擦自激振动研究  

Frictional Self-Excited Vibration of a Metro Pantograph-Catenary System

作　　者：冯晓航 陈光雄[1] 梅桂明[2] 董丙杰 赵鹏鹏 李先航 FENG Xiaohang;CHEN Guangxiong;MEI Guiming;DONG Bingjie;ZHAO Pengpeng;LI Xianhang(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031

出　　处：《西南交通大学学报》2025年第2期418-424,共7页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金项目(52175189)。

摘　　要：为研究弓网系统摩擦自激振动对碳滑板与接触线之间接触损耗的影响,基于摩擦自激振动理论,建立地铁刚柔过渡段处受电弓-接触网系统有限元模型,并利用复特征值分析方法研究不同弓网参数对该系统摩擦自激振动的影响.分析结果显示:弓网系统由摩擦自激振动引起接触线波磨产生的主频为399.61 Hz;当摩擦系数大于或等于0.11时,受电弓-接触网系统出现不稳定振动,且摩擦系数越大,该系统出现不稳定振动的趋势越强;法向接触力、碳滑板与接触线的接触位置以及弓头弹簧刚度对弓网系统摩擦自激振动的产生有很大影响;摩擦系数低于0.11并且选择合适的法向接触力或调整弓头弹簧刚度可以抑制甚至消除弓网系统的摩擦自激振动,进而减少弓/网间摩擦引起的接触损耗.In order to study the influence of frictional self-excited vibration of a pantograph-catenary system on the contact loss between the carbon strip and contact wire,a finite element model of the pantograph-catenary system at the rigid and flexible transition section of a metro was established based on the theory of frictional selfexcited vibration.The complex eigenvalue analysis method was used to study the influence of different pantograph-catenary parameters on the frictional self-excited vibration of the system.The analysis results show that the main frequency of contact line corrugation caused by frictional self-excited vibration of the pantographcatenary system is 399.61 Hz.When the friction coefficient is greater than or equal to 0.11,the pantographcatenary system has unstable vibration,and with the increase in the friction coefficient,the unstable vibration tends to be stronger.The normal contact force,the contact position between the carbon strip and the contact wire,and the stiffness of the pantograph bow spring have great influences on the occurrence of the frictional selfexcited vibration of the pantograph-catenary system.When the friction coefficient is less than 0.11,selecting the appropriate normal contact force or adjusting the stiffness of the pantograph bow spring can restrain or even eliminate the frictional self-excited vibration of the pantograph-catenary system and then reduce the contact loss caused by the friction between the pantograph and catenary.

关 键 词：弓网系统 刚柔过渡 摩擦自激振动 复特征值分析 数值仿真 

分 类 号：O323[理学—一般力学与力学基础]