摘要
某地铁线路运营过程中,在通过波磨区段时车辆振动水平加剧,从而导致车辆的轴箱盖螺栓、一系悬挂弹簧等部件频繁发生疲劳断裂。为了研究钢轨波磨对车辆振动特性的影响,首先在车辆各主要部件上安装振动加速度传感器,然后在存在钢轨波磨的线路上开展车辆振动测试,根据获取的振动加速度数据来分析钢轨波磨、轨道结构及钢轨打磨前后条件下车辆轴箱、弹簧座、构架和车体地板的振动特性。结果表明:钢轨波磨对车辆轴箱、弹簧座和构架的振动影响较大,但对车体地板的振动影响不明显。轮轨系统振动在传递过程中,二系悬挂系统起到了较大的衰减振动能量的作用。当打磨后的钢轨波磨依然存在但波深显著降低的前提下,车辆轴箱和构架的振动水平显著降低,车体地板振动水平无明显变化。
During the operation of a metro line,the vehicle vibration level increased when the vehicle passed through the corrugated section,which caused frequent fatigue fractures of vehicle components,such as axle box cover bolts and primary suspension spring.In order to study the influence of rail corrugation on vehicle vibration characteristics,we firstly installed vibration acceleration sensors on the main components of the vehicle,and then conducted vehicle vibration tests on the rail corrugated line.Based on the vibration acceleration data obtained,we analyzed rail corrugation and track structure and the vibration characteristics of the vehicle axle box,spring seat,frame,and car body floor before and after rail grinding.The results show that rail corrugation has a significant impact on the vibration of vehicle axle box,spring seat and frame,but the vibration on car body floor is not obvious.During the transmission of the vibration of the wheel-rail system,the secondary suspension system plays a great role in weakening the vibration energy.When the grinded rail corrugation still exists and the wave depth is significantly reduced,the vibration level of the vehicle axle box and frame is significantly reduced accordingly,but there is no significant change in the vibration level of car body floor.
作者
董勇
康彦兵
张华鹏
吴磊
DONG Yong;KANG Yanbing;ZHANG Huapeng;WU Lei(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《机械》
2021年第10期22-29,共8页
Machinery
基金
国家自然科学基金(51775454,51605395)
四川省科技计划(2020YJ0034,2020JDTD0012)。
关键词
波磨
钢轨打磨
振动特性
地铁线路
rail corrugation
rail grinding
vibration characteristics
metro line
