摘要
采用刚柔耦合动力学仿真方法,分别研究了轮对、构架及车体柔性对车辆稳定性的影响,对比了轮对、构架、车体柔性与全刚体结构条件下的车辆临界速度差异,并深入探讨了柔性结构引起临界速度变化的原因。结果表明,柔性结构会降低车辆的临界速度,三种柔性结构导致临界速度的减小量排序为:柔性车体<柔性构架<柔性轮对;车体柔性和构架柔性降低临界速度的根源在于抗蛇形减振器;柔性轮对带来的附加结构模态导致横向位移幅值增加,振动衰减变慢,振动周期变小。当多柔性体结构同时耦合存在时,由于叠加效应临界速度将会降低更多,因此传统的多刚体动力学方法会高估车辆运行稳定性,是偏于危险的。
The influence of wheelset, frame and carbody flexibility on vehicle stability is studied by using rigid-flexible coupling dynamic simulation method. The differences of vehicle critical speed under the wheelset, frame, body flexibility and full rigid structure models are compared. The reason of the change of the critical speed caused by the flexible structure is discussed. The results show that the flexible structure will reduce the critical speed of the vehicle system, and the decrease value of the critical speed can be sorted as: flexible carbody<flexible frame<flexible wheelset. The decrease of critical speed in flexible carbody and frame models mainly derives from the anti-yaw damper, while the amplitude of lateral displacement increases, the vibration attenuation slows down and the vibration period becomes smaller inflexible wheelset model. When the multi-flexible structures are co-existing, the critical speed due to the superimposed effect will decrease more. Therefore, the traditional multi-rigid-body method will overestimate the stability of the vehicle, which is dangerous.
作者
张波
罗光兵
蒋忠城
叶彪
ZHANG Bo;LUO Guangbin;JIANG Zhongchen;YE Biao(Study & Test Center, CRRC Zhuzhou Locomotive Co., Ltd., Zhuzhou 412001, China;The State Key Laboratory of Heavy Duty AC Drive Electric Locomotive Systems Integration, Zhuzhou 412001, China;EMU Section Tec. Center, Chengdu Railway Bureau, Chengdu 610031, China)
出处
《技术与市场》
2019年第6期5-8,共4页
Technology and Market
基金
四川省教育厅自然科学重点项目(17ZA0354)
国家自然科学基金项目(51665015)
流体及动力机械教育部重点实验室开放课题(szjj2016-013)
关键词
刚柔耦合
柔性结构
临界速度
抗蛇形减振器
rigid-flexible coupling dynamic simulation
flexible structure
critical speed
anti-yaw damper
