摘要
轮对是轨道交通车辆上的重要部件,在运行过程中会存在轮缘多变形,将直接影响着轮轴系统的振动乃至车辆舒适性,因此研究轮缘多边形对车轴的振动影响具有重要意义。本文基于多体动力学方法在ADMAS平台建立考虑轮缘多边形的轮轨动力学模型,研究存在轮缘多边形时,车速、多边形的阶次对轮轴振动的影响规律。结果表明:随着运行速度增加,轮轴振动增加,且低阶多边形对轮轴振动影响更大;当存在三阶多边形时,加速度幅值在车轮转动频率36倍频时达到最大,当存在二十一阶多边形时,加速度对应频率幅值在车轮转动频率21倍频处达到最大,与多边形阶数相同。
Wheel set as an important part of rail transit vehicles whose flange exist polygons during running will directly affect the vibration of wheel axle and even the comfort of vehicle. Therefore, it is of great significance to study the influence of wheel polygon on axle vibration. In this paper, a wheel- rail dynamics simulation model considering the polygon based on the multi-body dynamics theory by ADAMS is built to study the influence of flange polygons on the vibration of the wheel axle, in-cluding train speed, polygon order. The results show that the vibration of wheel axle will increase with the increasment of speed, and the low-order polygon has more obvious impact. The amplitude of wheel acceleration at 36 times of rotation frequency is Maximum if wheel exists 3 order polygon. Meanwhile, it is at 21 times which consistent with polygon order.
出处
《机械工程与技术》
2020年第5期411-420,共10页
Mechanical Engineering and Technology
关键词
轮缘多边形
多体动力学
多边形阶次
振动
Wheel Flange Polygon
Multi Body Dynamics
Order of Polygon
Vibration
