基于动力车晃车的等效锥度边界研究  

Research on Equivalent Conicity Boundary Based on Power Car Swing

作　　者：许自强 贾喆 张楠 董孝卿 林凤涛 XU Ziqiang;JIA Zhe;ZHANG Nan;DONG Xiaoqing;LIN Fengtao(Locomotive&Car Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Key Laboratory for Conveyance and Equipment of the Education Ministry of China,East China Jiaotong University,Nanchang 330013 Jiangxi,China;Taiyuan Depot,Daqin Railway Co.,Ltd.,Taiyuan 030045 Shanxi,China)

机构地区：[1]中国铁道科学研究院集团有限公司机车车辆研究所,北京100081 [2]华东交通大学载运工具与装备教育部重点实验室,南昌330013 [3]大秦铁路股份有限公司太原车辆段,太原030045

出　　处：《铁道机车车辆》2024年第5期125-131,共7页Railway Locomotive & Car

基　　金：国家自然科学基金(52065021);中国国家铁路集团有限公司科技研究开发计划(N2021J027)。

摘　　要：动力集中动车组在运营过程中出现了动力车车体晃车现象,导致车辆降速,影响运营秩序。为分析动力车晃车原因,开展了动力车线路试验并研究晃车机理,利用实测数据验证仿真模型,仿真分析了晃车的等效锥度边界条件。线路试验显示轮轨匹配等效锥度过小激发了动力车的晃车现象,车体横向平稳性达到3.1。动力车的车体蛇行模态阻尼比偏小,当运行速度大于140 km/h时,等效锥度过小将激发车体蛇行导致车体晃车,晃车频率在0.8~1.2 Hz左右;将实测车轮踏面输入至动力学模型进行仿真,得到了晃车等效锥度边界为0.043,该限值可用于评估车轮旋修与钢轨打磨质量。During power centralized EMU operation,swing-phenomenon of power car occurs,which leads to the deceleration of vehicles and affects the operation order.In order to find out the swing cause,field test was carried out and the swing mechanism was analyzed on the power car.The simulation model was verified by the field test data,and the equivalent conicity boundary condition of the power car swing were simulated.The field test shows that the wheel/rail matching equivalent conicity is too small,which triggers the swing of the carbody,and the lateral stability of the carbody reaches 3.1.The damping ratio of the snake mode of the vehicle body is small.When the running speed is greater than 140 km/h and the equivalent conicity is small,it is easy to excite the carbody snaking and cause the phenomenon of swing,and the frequency of the vehicle swing is near 0.8-1.2 Hz.The measured wheel tread is input into the dynamic model for simulation,and it is found that the equivalent conicity boundary of the vehicle is 0.043.This limit value can be used to evaluate the quality of wheel repair and rail grinding.

关 键 词：动力车 线路试验 晃车问题 轮轨匹配 等效锥度边界 

分 类 号：U270.11[机械工程—车辆工程]