钢轨焊缝处轮轨力特性宏微观分析  

Macro and micro analysis of wheel and rail force characteristics at rail welds

作　　者：万齐行 何越磊[1] 路宏遥 WAN Qihang;HE Yuelei;LU Hongyao(School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China;Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]上海工程技术大学城市轨道交通学院,上海201620 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《山东理工大学学报(自然科学版)》2025年第3期33-37,78,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51978393);中国铁路上海局集团有限公司科研计划项目(2023042)。

摘　　要：钢轨焊缝是铁路线路中最复杂结构之一,焊缝处的轮轨力特性显著区别于其他区域。基于某高速铁路客运专线钢轨焊缝处的轮轨力监测数据,分析了不同行车速度和车厢位置的轮轨力特性;引入非线性混沌理论对钢轨焊缝处轮轨力进行微观分析,实现了对轮轨力特性的多层次分析。研究表明:钢轨焊缝处行车面与导向面平直度变化量分别为0.174 mm和0.370 mm;在这种线路条件下,不同行车速度的轮轨力特性存在差异,钢轨焊缝处列车的最不利通过速度为200~220 km/h;不同车厢位置的轮轨力特性也存在差异,列车头部和尾部车厢处轮重减载率是其他车厢的1.261倍。引入关联维数对不同工况下焊缝处轮轨力进行微观分析,验证宏观轮轨力特性,完成了对钢轨焊缝位置轮轨力特性的宏微观综合评价。Rail weld is one of the most complex structures in railway lines,and the wheel-rail force characteristics at the weld are significantly different from those in other areas.Based on wheel-rail force monitoring data at the rail weld of a high-speed passenger line,this study analyzes the wheel-rail force characteristics of different train speeds and carriage positions.The nonlinear chaos theory is introduced to carry out microscopic analysis of the wheel-rail force at the rail weld,enabling the multi-level analysis of the wheel-rail force characteristics.The results show that the changes in the flatness of the running surface and the guiding surface at the rail weld are 0.174 mm and 0.370 mm,respectively.Under this line condition,there are differences in the wheel-rail force characteristics of different passage speeds,and the most unfavorable train speed at the rail weld is 200~220 km/h.There are also differences of the wheel-rail force characteristics in different carriage positions,and the wheel weight reduction rate of the front and rear carriages is 1.261 times greater than that of other carriages.Furthermore,the correlation dimension is introduced for microscopic analysis of the wheel-rail force at the welds under various operating conditions,validating the macroscopic wheel-rail force characteristics.The wheel-rail force characteristics at the rail weld are comprehensively evaluated from macro and micro aspects.

关 键 词：高速铁路 钢轨焊缝 轮轨力 安全特性 宏微观分析 

分 类 号：U216.8[交通运输工程—道路与铁道工程]