CRH380B动车组车体高度差对动力学性能的影响

Influence of Vehicle Hight Difference on Dynamic Performance of CRH380B

为研究车体之间高度差对动力学性能的影响,针对8辆车编组的CRH380B型动车组,考虑典型的轮轨匹配关系,对无车高差及典型的6种车高差分别建立动力学仿真模型,针对典型的风速和限速,对车高差产生的空气动力学影响进行数值分析.同时,以空气动力学数据为输入,分析了车高差对列车系统动力学性能以及对动车组侧风运行安全性的影响.在15~30 m/s侧风作用下,不同的车体高度差工况对运行安全性指标的影响一般在10%以内.车辆动力学指标均满足相关标准要求,运行安全性指标具有一定的安全裕量.

In order to study the influence of vehicle height difference on dynamic performance of 8 vehicles of CRH380B, typical wheel and track matching relationship are considered, and the dynamic simulation models of 7 different vehicle heights are established. Numerical analysis of aerodynamic impact on vehicle height is conducted under typical wind speed and the speed limit. With aerodynamic data as input, the effect of vehicle height difference on the dynamic performance of the train system and crosswind running safety of EMU is analyzed. On the effect of 15 m/s to 30 m/s crosswind, the influence of vehicle height difference conditions on the operation safety indicators is generally less than 10%. The vehicle dynamic indexes meet the requirements of relevant standards, and the operation safety indicators have certain safety margin.