动车组列车车下设备悬挂参数对车体振动的影响分析

Effects of Suspended Parameters of Under-frame Equipment of EMU Train on Vibrations of Car-body

随着高速动车组技术的发展,车体的轻量化设计越来越被重视,但车体的轻量化设计会降低车体的整体刚度,从而会加剧车体及车下设备的振动.建立了考虑大质量车下设备及车体主要自由度的刚柔耦合车辆动力学模型,并利用模型分析了车下设备悬挂刚度对振动的影响.结果表明,车下设备悬挂系统的横向和垂向刚度的选择,应该从车体及车下设备振动两方面考虑,尽量避开加速度峰值.这种选取悬挂刚度的方法为工程应用提供理论参考.

As the development of high-speed train technology, the lightweight design of the car body has attracted more and more attention, but the lightweight design of the car body will reduce the overall stiffness of the car body, which will increase the vibration of the car body and the under-frame equipment. The rigid-flexible-coupled dynamic model of a vehicle is built considering great quality vehicle equipment and DOF of vehicle body. The influence on the vibration of the variable suspension stiffness of equipment under the vehicle is analyzed by this model. The results show that the lateral and vertical stiffness of the suspension system of the vehicle should be considered from two aspects of the vibration of car body and the under-frame equipment so as to avoid the peak value of acceleration. The method of selecting suspension stiffness provides theoretical reference for engineering application.