小半径曲线中低速磁浮车辆-轨道耦合系统动力响应分析  

Dynamic response analysis of a low-medium speed maglev vehicle-track coupled system on tight curve

作　　者：王相平 李国芳[1] 慕显龙 王红兵 靳忠渊 丁旺才[1] WANG Xiangping;LI Guofang;MU Xianlong;WANG Hongbing;JIN Zhongyuan;DING Wangcai(School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Taiyuan Rolling Stock Department,Taiyuan Railway Bureau Group Corporation,Taiyuan 030012,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]太原铁路局集团公司太原车辆段,太原030012

出　　处：《振动与冲击》2022年第10期81-89,105,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(12162020,11962013);甘肃省高等学校创新基金项目(2021A-041,2021B-095);甘肃省教育厅高校大学生就业创业能力提升工程项目(2021);甘肃省教育厅优秀研究生“创新之星”项目(2021CXZX-584)。

摘　　要：小半径曲线上中低速磁浮车辆-轨道系统的动力响应对车辆安全运营具有重要意义,但当前研究极少涉及。运用有限元和多体动力学方法,建立了中低速磁浮车辆-小半径曲线段高架轨道耦合动力学模型,考虑空间动态磁轨作用以及轨道关键部件的参振作用,分析了小半径曲线上的车辆-轨道系统动力响应。结果表明:二维磁轨关系会过大地估算曲线段磁轨作用力;曲线段磁浮车辆车体主要为2 Hz以下的低频晃动;曲线段连续梁钢构高架轨道的振动主要由0~20 Hz的轨道整体弯扭变形和80~100 Hz的F轨局部弯扭变形引起;轨道垂向振动加速度缓和曲线段大于圆曲线段,横向振动加速度圆曲线段大于缓和曲线段,缓和曲线段振动加速度对车速变化更为敏感。研究结果可为曲线段磁浮高架轨道设计和车辆安全运营提供理论依据。The effect of dynamic responses of a low-medium speed maglev vehicle-track system on tight curve is of great significance to the safe operation of vehicles,but it is rarely involved in the current research.Using finite element method and according to the multi-body dynamics,the dynamic model of an elevated track with low-medium speed maglev vehicle and tight curve was established.The dynamic response of the vehicle-track system on tight curve was analyzed,considering the dynamic magnetic track action in space and the interaction among key components of the track.The results show that the 2D magnetic track relationship will over estimate the magnetic track force in the curve segment;the fluctuation of the body of maglev vehicle in the curve segment is mainly low-frequency sloshing below 2 Hz.The vibration of the elevated rail with the structure of a continuous beam in the curve segment is mainly caused by the overall bending and torsional deformation of the track at 0-20 Hz as well as the local bending and torsional deformation of the F rail at 80-100 Hz.The vertical vibration acceleration in the easing curve segment is greater than that in the circular curve segment,and the transverse vibration acceleration in the circular curve segment is greater than that in the easing curve segment.The vibration acceleration in the easing curve segment is more sensitive to the change of vehicle speed.The research results provide a theoretical basis for the design of maglev elevated track in the curve segment and the safe operation of vehicles.

关 键 词：中低速磁浮交通 柔性轨道梁 动态磁轨关系 车轨耦合振动 动态曲线通过 

分 类 号：U237[交通运输工程—道路与铁道工程] U24