桥梁跨距对车辆运行平稳性的影响研究  

Influence of bridge span on vehicle running steadiness

作　　者：张波[1,2,3] 沈龙江 刘国云 舒瑶 袁玄成 蔡宇祥 ZHANG Bo;SHEN Longjiang;LIU Guoyun;SHU Yao;YUAN Xuancheng;CAI Yuxiang(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;The State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive,Zhuzhou 412001,China;CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]重载快捷大功率电力机车全国重点实验室,湖南株洲412001 [3]中车株洲电力机车有限公司,湖南株洲412001

出　　处：《电力机车与城轨车辆》2023年第5期27-31,共5页Electric Locomotives & Mass Transit Vehicles

基　　金：湖南省重点研发计划项目(2022WK2013);湖南省科技重大专项(2022GK1060)。

摘　　要：针对某车辆通过高架桥时的异常振动问题,文章开展了线路动力学试验研究,测试对比了不同速度、不同载重、空簧正常和失气等工况下的振动情况,发现30 m桥梁跨距固定波长下车桥耦合共振是导致车辆垂向振动异常的原因。为了找出抑制异常振动的有效措施,建立了车辆动力学模型,并仿真研究了关键参数对车辆垂向平稳性指标的影响规律。研究结果表明:降低二系空簧垂向刚度或提高二系垂向阻尼可以改善车辆在高架桥上的垂向平稳性指标,避免刚体模态共振。Aiming at the problem of abnormal vibration of a vehicle passing through a elevated bridge,the dynamic test on the line is carried out to compare the vibration conditions under different speeds,different loads,normal state and loss of air spring.It is found that the vehicle-bridge coupling resonance at the fixed wavelength of 30 m bridge span is the cause of abnormal vertical vibration of the vehicle.In order to find effective measures to suppress abnormal vibration,the vehicle dynamics model is established,and the influence of key parameters on vehicle vertical stability is studied based on simulation.The research results show that by reducing the vertical stiffness of the secondary air spring or increasing the damping of the secondary vertical damper,the vertical steadiness of the vehicle on the elevated bridge can be improved and the rigid modal resonance can be avoided.

关 键 词：桥梁跨距 异常振动 刚体模态 平稳性 

分 类 号：U270.11[机械工程—车辆工程]