高墩温度变形下高速列车车桥耦合振动研究  

Research on vehicle-bridge coupled vibration of high-speed train under high pier temperature deformation

作　　者：戴公连[1] 肖尧 王芬 葛浩 DAI Gonglian;XIAO Yao;WANG Fen;GE Hao(School of Civil Engineering,Central South University,Changsha 410075,China;Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《华中科技大学学报（自然科学版）》2023年第8期47-52,59,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51708560);湖南省自然科学基金资助项目(2018JJ3672)。

摘　　要：为评估温度作用下高墩变形对高速列车-桥耦合系统振动响应的影响,在32 m标准简支梁上进行动力试验,测量并分析CRH380A-001型列车作用下的桥梁加速度响应,将其与车桥耦合振动仿真计算结果进行对比分析.在该桥高墩现场埋置温度传感器,实时监控得到1 a的温度数据,采用最大熵极值分析方法对温度数据进行分析,求得100 a重现期下的桥墩温度代表值,用于计算高墩的轴向变形,并采用解析法计算高墩的横桥向变形,以研究高墩温度变形对列车走行能力的影响.结果表明:实测数据与车桥耦合振动模型计算结果符合度高;高墩温度变形会使列车脱轨系数、横向力、加速度和Sperling指标增大,在不利情形下会导致Sperling指标明显增大.In order to evaluate the influence of high pier temperature deformation on the vibration response of high speed trainbridge coupled system,the dynamic test was carried out on a 32 m standard simply supported beam.The bridge acceleration response under the action of CRH380A-001 train was measured and analyzed,which was compared with the simulation results of vehicle-bridge coupled vibration.The temperature sensor was embedded in the high pier site,and the temperature data of 1 a was obtained through real-time monitoring.The maximum entropy extreme value analysis method was used to analyze the temperature data.Then the representative value of pier temperature under 100 a return period was obtained to calculate the axial deformation of high pier,and the transverse deformation of the pier was calculated by analytical method.The influence of high pier deformation on train runnability was studied.The results show that the measured data are in good agreement with the calculated results of vehicle-bridge coupled vibration model.The temperature deformation of high pier will increase the derailment coefficient,lateral force,acceleration and Sperling index of train,and will cause the significant increase of Sperling index under adverse circumstances.

关 键 词：车桥耦合振动 简支梁桥 温度变形 动力响应 列车走行性 现场试验 

分 类 号：U211.3[交通运输工程—道路与铁道工程] U24