非均匀速度分布对地铁曲线区段钢轨磨耗演变的影响  

Influence of non-uniform passing speed distribution on rail wear evolution in the curved section of Metro

作　　者：高雅 时瑾[1] 焦彬洋 杨飞 GAO Ya;SHI Jin;JIAO Binyang;YANG Fei(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;China Railway Materials Operation and Maintenance Technologies Co.,Ltd.,Beijing 100036,China;Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中铁物总运维科技有限公司,北京100036 [3]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081

出　　处：《振动与冲击》2022年第14期41-49,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52078035);中国国家铁路集团有限公司科技研究开发计划(P2021G053)。

摘　　要：基于三角概率分布研究了速度分布的不均匀性对曲线轨道钢轨磨耗演变的影响。采用Archard材料磨耗模型,结合基于虚拟渗透的非Hertz滚动接触理论进行钢轨磨耗预测仿真;建立曲线区段车辆与轨道动力相互作用模型,对不同速度条件下的钢轨磨耗按权重进行累积计算,结合B-spline函数对磨耗后的钢轨型面进行平滑更新,对比分析了地铁B型车以单一速度和非均匀速度通过曲线钢弹簧浮置板区段时的钢轨磨耗演变情况。结果表明:钢轨磨耗在圆曲线上较大,磨耗光带基本平行于轨道纵向,磨耗深度沿轨道纵向分布不均匀;钢轨磨耗范围随钢轨型面更新次数的增加逐渐增加,磨耗速率随钢轨型面更新次数的增加先增加后减小;非均匀速度通过有效提高了钢轨磨耗分布沿轨道纵向的均匀性;第10次更新时采用非均匀速度通过和优化钢轨型面与采用单一速度通过和磨耗钢轨型面相比车辆累计通过数量增加了近一倍,显著减缓了曲线段钢轨磨耗速率,极大地增加了车辆运行稳定性;在地铁实际运营中可通过在高峰和低峰时段采取非均匀速度控制模式,在一定程度上减缓钢轨磨耗速率。Based on the trigonometric probability distribution,the influence of the uniformity of passing speed distribution on the rail wear evolution of a curved track was studied.The Archard material wear model and the non-Hertz rolling contact theory based on virtual penetration were used to predict rail wear;a vehicle and track dynamic interaction model on the curved track was established to calculate the rail wear under different running speeds with weighted accumulation,and the worn rail profile was smoothed by a B-spline function.The evolution of rail wear of Metro B-type vehicles passing through a curved steel spring floating plate section with single speed and non-uniform speed was compared and analyzed.The results show that the rail wear is larger on the circular curved,track and the rail wear band is basically parallel to the longitudinal direction of the track,while the wear depth is unevenly distributed;with the increase of rail profile updating times,the range of rail wear region increases gradually,and the rail wear speed first increases and then decreases;the non-uniform passing speed can effectively improve the rail wear uniformity and slow down the rail wear rate.Compared with the case of single speed passing and according to the worn rail profile,the cumulative number of passing vehicles is nearly doubled in the case of non-uniform speed passing with the use of optimized rail profile after 10 times updating,which significantly slows down the rail wear rate of the curved section and greatly increases the vehicle running stability.In the actual operation of Metro,the rail wear rate can be reduced to a certain extent by adopting the non-uniform speed control mode in the peak and low peak periods.

关 键 词：地铁 非均匀速度分布 磨耗预测 钢弹簧浮置板 动力响应 曲线通过 

分 类 号：U213[交通运输工程—道路与铁道工程]