界面热传导性能对弓网接触温升的影响分析
闭永雷1吴爱中1,2宋恩昊1
Impact Analysis of Interface Thermal Conductivity on Pantograph-Catenary Contact Temperature Rise
BI Yonglei1WU Aizhong1,2SONG Enhao1
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作者信息:1.上海工程技术大学城市轨道交通学院，201620，上海
2.上海市轨道交通振动与噪声控制技术工程研究中心，201620，上海
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Affiliation:1.School of Urban Rail Transportation, Shanghai University of Engineering Science, 201620, Shanghai, China
2.Shanghai Engineering Research Centre for Vibration and Noise Control Technologies in Railway Transportation, 201620, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.03.023
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中图分类号/CLCN:U231.8
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栏目/Col:研究报告
摘要:
［目的］电动列车弓网接触导致的界面温升容易加剧受电弓滑板材料的磨损，从而增加轨道交通运营维护成本，因此开展弓网接触温升研究有重要意义。［方法］接触电阻导致的焦耳热是接触温升的热源之一，而接触界面的热传导特性影响接触副温度场分布，两者均为影响温度场的重要因素。推导了弓网接触电阻和接触热传导的计算模型，建立滑板-接触线三维有限元模型对温度场进行多场耦合计算，分析了滑板热导率对接触热导系数及温升的影响。［结果及结论］分析结果表明，长时间接触条件下滑板内部存在热量“囤积”现象；提升滑板材料的热导率可以降低滑板的接触温升，进而降低滑板材料的热损伤。
Abstracts:
［Objective］ The interface temperature rise caused by PC (pantograph-catenary) contact in electric trains can accelerate the wear of pantograph strips, thereby increasing the maintenance costs of rail transit systems. Therefore, studying the temperature rise in PC contact is of significant importance. ［Method］ Joule heating from contact resistance is one of the primary sources of temperature rise in PC contact, while the thermal conductivity characteristics of the contact interface influence the temperature distribution of the contact pair, both factors are critical to the temperature field. First, calculation models for PC contact resistance and thermal conductivity are derived. Then, a 3D finite element model of the strip and contact wire system is established for multi-physics coupling calculations to analyze the effect of the strip′s thermal conductivity rate on the contact thermal conductivity coefficient and temperature rise. ［Result & Conclusion］ Analysis results show that a heat ′accumulation′ phenomenon occus in the strip under prolonged contact condition; increasing the thermal conductivity of strips can reduce the contact temperature rise, thereby mitigating thermal damage to the strips.
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