弓网强电流滑动电接触摩擦振动分析与建模

Analysis and Modeling of High Current Sliding Electrical Contact Friction Dynamics in Pantograph-Catenary System

在电气化铁路弓网系统中,受电弓滑板与接触线之间的摩擦振动加速度反映了弓网载流摩擦的接触状况,影响弓网的离线概率以及磨损状态。该文通过对弓网接触状态的分析,建立弓网摩擦副的弹簧-阻尼-质量模块摩擦振动模型。通过实验研究,在考虑法向压力、运行速度及电流强度三要素对摩擦振动的影响下,分析摩擦振动模型中特性参数和受力与三要素的函数关系;在此基础上,利用实验数据求解函数关系中的常数参数。最后通过实验验证摩擦振动模型的精确性,为进一步研究弓网系统的载流摩擦磨损机理以及离线概率提供理论依据。

In the pantograph-catenary system of electrified railway,the frictional vibration acceleration between the pantograph slider and the catenary wire reflects the contact condition of the current-carrying friction,and affects the off-line probability and wear state of pantograph-catenary system.In this paper,by analyzing the contact state between the pantograph slider and catenary wire,the spring-damping-quality module friction vibration model of the pantograph-catenary friction pair was established.According to the experiments,the relationship of characteristic parameters and force with three factors in frictional vibration model was analyzed by considering the influence of normal pressure,running speed and high current on frictional vibration.Then,the experimental data was used to solve the constant parameters in the functional relationship.Finally,the accuracy of the frictional vibration model was verified by experiments,which provides a theoretical basis for further study on the current-carrying frictional wear mechanism and off-line probability of the pantograph-catenary system.