接触网覆冰工况下城市轨道交通线路弓网关系研究
赵海波周佳明张帅
Pantograph-Catenary Relation of Urban Rail Transit Lines under Catenary Iced Condition
ZHAO HaiboZHOU JiamingZHANG Shuai
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作者信息:中车长春轨道客车股份有限公司国家轨道客车工程研究中心，130062，长春
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Affiliation:National Engineering Research Center of Railway Vehicles, CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.02.018
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中图分类号/CLCN:U255；U264.34
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栏目/Col:研究报告
摘要:
［目的］在接触网表面因冰冻天气形成冰层的工况(以下简称“覆冰工况”)下，列车受电弓的正常受流受到影响，严重时会在接触网与受电弓之间产生拉弧现象，进而造成接触线严重磨损、受电弓碳滑板烧伤等问题。为保证列车在冬季冰冻环境下可靠运行，需要探究覆冰工况下列车运行速度对弓网系统动态特性的影响规律。［方法］基于有限元理论，建立了接触网覆冰工况下城市轨道交通线路弓网动力学模型。选取覆冰厚度5mm、10mm、15mm和20mm四种情况，得到了接触线驰度的仿真计算结果。在此基础上，对覆冰工况下弓网系统动态特性(接触力变化、定位点振动)的影响进行了分析。［结果及结论］随着覆冰厚度的增大，接触线的驰度变大，接触网的整体形状不规则度也随之增加。覆冰厚度越大，弓网接触力的振幅越大。
Abstracts:
［Objective］ Under the condition of ice forming on catenary surface (hereinafter referred to as ′iced condition′), the normal current collection of train pantograph is disrupted. In severe cases, arcing may occur between the pantograph and the catenary, leading to severe catenary wear and pantograph carbon slide strip damages. To ensure reliable train operation in frozen winter environments, it is essential to investigate the influence of train operating speed on the dynamic characteristics of the PC (pantograph-catenary) system under iced conditions. ［Method］ Based on finite element theory, a dynamic model of the PC system for urban rail transit lines under catenary iced conditions is developed. Simulation calculation results of catenary sagging conditions are obtained in four selected scenarios with ice thicknesses of 5 mm, 10 mm, 15 mm, and 20 mm. On this basis, the impact of PC system dynamic characteristics (contact force variation, vibration at positioning points) under iced conditions are analyzed. ［Result & Conclusion］ As the ice thickness increases, the sagging of catenary becomes more pronounced, and the overall irregularity of the catenary shape intensifies; hereby larger ice thickness values result in greater amplitudes of the contact force in PC system.
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