环境温度对地铁刚性接触网弹性与弓网受流质量影响研究  

Influence of environmental temperature on the elasticity of rigid catenary and pantograph-catenary current collection quality of subway lines

作　　者：杨岗[1] 吕琨 孔国伟 沈鑫 李芾[1] YANG Gang;LYU Kun;KONG Guowei;SHEN Xin;LI Fu(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《机车电传动》2024年第1期152-165,共14页Electric Drive for Locomotives

基　　金：国家重点研发计划(2020YFB1200300ZL);四川省重点研发项目(2023YFG0063)。

摘　　要：近年来全国地铁大面积发生弓网异常磨耗事件,特别是冬季异常磨耗已然成为常态,2022年全国有30余条地铁线路出现此现象,经济损失达数亿元。为了研究环境温度对弓网关系的影响,文章首先建立了某地铁线路刚性接触网有限元模型,计算得到环境温度-20~20℃下接触网刚度曲线,并分析了环境温度对接触网刚度影响规律;然后,构建地铁变刚度弓网耦合动力学模型,依据EN 50119等标准验证了其准确性,并计算了环境温度(-20~20℃)、列车运行速度(40~90 km/h)、受电弓静抬升力(70~160 N)、定位线夹卡滞工况下的弓网接触力,着重分析了环境温度对弓网接触力、弓网受流质量的影响规律。结果表明:环境温度与弓网接触力、受流质量具有强正相关性,当环境温度低于0℃时,弓网受流指标将严重恶化;线夹卡滞会对弓网接触力、受流质量带来恶劣影响,而且行车速度越高影响越大。In recent years,there have been large-scale incidents of abnormal wear on subway pantographs and catenaries across China,especially in winter.In 2022,more than 30 subway lines nationwide encountered this issue,resulting in economic losses amounting to hundreds of millions of yuan.In order to study the influence of environmental temperature on the pantograph-catenary relationship,a finite element model of the rigid catenary of a subway line was established.The stiffness curve of the catenary was calculated at ambient temperatures of-20~20°C.The pattern of influence of environmental temperature on the stiffness of the catenary was analyzed.Then,a dynamic model of subway pantograph-catenary coupling with variable stiffness was established,and its accuracy was verified according to EN 50119 and other standards.The pantograph-catenary contact force was calculated under the conditions of ambient temperatures of-20~20°C,train running speed of 40~90 km/h,pantograph static lifting force of 70~160 N,and stuck positioning clamps.Furthermore,the influence of environmental temperature on the pantograph-catenary contact force and the pantograph-catenary current collection quality was analyzed.The results show that there is a strong positive correlation between environmental temperature and the pantograph-catenary contact force and current collection quality.When the environmental temperature is below 0°C,the pantograph-catenary current collection index will seriously deteriorate;stuck wire clamps will have a negative impact on the pantograph-catenary contact force and current collection quality,and the higher the train running speed,the greater the impact will be.

关 键 词：刚性接触网 环境温度 接触网刚度曲线 弓网接触力 受流质量 弓网耦合动力学 

分 类 号：U231[交通运输工程—道路与铁道工程]