首页|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

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

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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(40～90km/h)、受电弓静抬升力(70～160N)、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.
Influence of environmental temperature on the elasticity of rigid catenary and pantograph-catenary current collection quality of subway lines
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 amount-ing to hundreds of millions of yuan.In order to study the influence of environmental temperature on the pantograph-catenary relation-ship,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 ℃.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 ac-cording to EN 50119 and other standards.The pantograph-catenary contact force was calculated under the conditions of ambient tempera-tures of-20～20 ℃,train running speed of 40～90 km/h,pantograph static lifting force of 70～160 N,and stuck positioning clamps.Fur-thermore,the influence of environmental temperature on the pantograph-catenary contact force and the pantograph-catenary current col-lection quality was analyzed.The results show that there is a strong positive correlation between environmental temperature and the pan-tograph-catenary contact force and current collection quality.When the environmental temperature is below 0 ℃,the pantograph-catena-ry 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.

rigid catenaryenvironmental temperaturestiffness curve of catenarypantograph-catenary contact forcecurrent collection qualitypantograph-catenary coupling dynamics

杨岗、吕琨、孔国伟、沈鑫、李芾

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西南交通大学机械工程学院,四川 成都 610031

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

国家重点研发计划四川省重点研发项目

2020YFB1200300ZL2023YFG0063

2024

10.13890/j.issn.1000-128X.2024.01.129

机车电传动
中国南车集团株洲电力机车厂

机车电传动

CSTPCD
影响因子：0.347
ISSN：1000-128X
年,卷(期)：2024.(1)
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