大跨度斜拉桥轨道不平顺演变规律及其对列车运行平稳性影响研究  

Study on the Evolution Law of Track Irregularity of Long-Span Cable-Stayed Bridge and Its Influence on Train Running Stability

作　　者：赵秀 程益凡 赵世豪 梅大鹏 王铭[3,4] ZHAO Xiu;CHENG Yifan;ZHAO Shihao;MEI Dapeng;WANG Ming(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Department of Science&Technology and Law,National Railway Administration of the People’s Republic of China,Beijing 100891,China;National Key Laboratory of Bridge Intelligent and Green Construction,Chengdu Sichuan 611756,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 611756,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan Hubei 430056,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]国家铁路局科技与法制司,北京100891 [3]桥梁智能与绿色建造全国重点实验室,四川成都611756 [4]西南交通大学土木工程学院,四川成都611756 [5]中铁大桥勘测设计院集团有限公司,湖北武汉430056

出　　处：《中国铁道科学》2025年第1期87-95,共9页China Railway Science

基　　金：甘肃省自然科学基金资助项目(23JRRA1687)。

摘　　要：桥上列车行车安全性和乘坐舒适性要求轨道线形具有良好的平顺状态。大跨度铁路斜拉桥属于柔性结构,受到温度变化和列车荷载等外部因素的作用,桥梁会产生明显竖向挠曲变形,从而影响高速列车的运行平稳性。以1座主跨长达1 092 m的大跨度公铁两用斜拉桥为例,基于列车、轨道和桥梁耦合振动分析理论,结合时域和频域分析方法,研究其上轨道不平顺的演变规律及其对高速列车运行平稳性的影响。结果表明:桥上轨道静态不平顺的演变受桥梁温度变形的影响明显,主要集中在110 m波长以上,而温度和行车工况对桥上轨道动态不平顺的影响主要集中在120 m波长以上;温度及车辆荷载导致的桥上轨道不平顺对列车运行平稳性的影响主要集中在桥塔、边跨及次边跨位置;该桥0~120和0~200 m波段桥上轨道不平顺成分对车体竖向加速度的贡献差异最大为0.28%;综合60 m弦测法有效检测波长上限、综合检测列车最大有效检测波长,该桥上高速列车乘坐舒适性的轨道动态不平顺管理截止波长宜取120 m。The running safety and riding comfort of trains on the bridge require the track alignment with good regularities.The long-span railway cable-stayed bridge belongs to flexible structure.Affected by external factors such as temperature change and train load,the bridge will produce obvious vertical deflection deformation,which challenges the running stability of high-speed trains.A long-span rail-cum-road cable-stayed bridge with a main span of 1092 m is taken as an example.Based on the coupling vibration analysis theory of train,track and bridge,combined with the time domain and frequency domain analysis methods,the evolution law of track irregularities and its influence on the running stability of high-speed trains are studied.The results show that the evolution of static track irregularities on the bridge is obviously affected by the temperature deformation of the bridge,and the influence is mainly concentrated above the wavelength of 110 m.The influence of temperature and running conditions on the dynamic track irregularities on the bridge is mainly concentrated above the wavelength of 120 m.The influence of track irregularities caused by temperature and train loads on the running stability of trains is mainly concentrated on the bridge tower,side span and secondary side span.The maximum contribution difference of the track irregularity components on the bridge to the carbody vertical acceleration in the 0-120 m and 0-200 m bands is 0.28%.Combining the upper wavelength limit effectively detected by the 60 m chord measurement method and the maximum effective detection wavelength of the comprehensive inspection train,the management cut-off wavelength of the track dynamic irregularities on the bridge to ensure the riding comfort of high-speed trains is suggested as 120 m.

关 键 词：大跨度斜拉桥 列车运行平稳性 轨道不平顺 管理波长 演变规律 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]