蛇行运动对铁道车辆平稳性的影响  

Influence of hunting motion on ride quality of railway vehicle

作　　者：池茂儒[1] 张卫华[1] 曾京[1] 金学松[1] 朱旻昊[2] 

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]西南交通大学机械工程学院,四川成都610031

出　　处：《振动工程学报》2008年第6期639-643,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50705079);973计划资助项目(2007CB714700);西南交通大学创新团队培育计划资助项目(2007IRT01)

摘　　要：为了研究转向架蛇行运动对铁道车辆运行平稳性的影响,首先从频域内仿真计算了转向架蛇行运动模态和车体固有振动模态的模态参数。由于转向架蛇行运动频率随着速度的增加而增加,而车体的固有频率是不随速度而变化的,这样,在某一速度下,转向架的蛇行运动频率将和车体相关振动的固有频率接近而发生共振。然后从时域内分析了车辆在不同速度下的平稳性,通过仿真计算发现,车辆横向平稳性指标不是随着运行速度的增加而单调增加,而是出现了两个局部峰值,而这两个峰值对应的速度正好和蛇行共振速度是一致的,这说明蛇行共振对车辆的横向平稳性是有较大影响的。所以为了改善车辆的运行平稳性,应采取适当措施使蛇行共振速度区远离车辆的常用运行速度。In order to research the influence of bogie＇s hunting motion on ride quality of railway vehicle, the hunting mode of bogie and the natural mode of car body were calculated in frequency-domain firstly. Since the frequency of bogie hunting would increase along with the increasing of vehicle running velocity and the natural frequency of car body would not change, thus the frequency of bogie hunting and the natural frequency of car body would approach and resonate at the certain speed. Then the ride quality of vehicle at the different speed were calculated in time-domain and it was found that the lateral ride quality index of vehicle would not increase monotonously, rather than appear two local peak value and the speed of two peak point and the hunting resonance speed are coincident, which indicate that hunting resonance has influence on ride quality of railway vehicle. So in order to improve the ride quality of vehicle, some proper measure would be taken to keep the hunting resonance speed away from the common running speed of vehicle.

关 键 词：铁道车辆 转向架 蛇行运动 模态 平稳性 

分 类 号：U211.3[交通运输工程—道路与铁道工程] U270.1[机械工程—车辆工程]