轴箱内置和外置高速转向架的动力学性能对比

根据悬挂系统的结构形式,转向架分为轴箱内置转向架和轴箱外置转向架。相对于轴箱外置转向架,轴箱内置转向架结构紧凑、质量小,有利于降低轮轨磨耗和通过小半径曲线,具有良好的线路适应性。针对时速350 km/h货运动车组,考虑高铁线路和既有线路运行工况,通过动力学仿真软件SIMPACK计算车辆分别采用轴箱内置转向架和轴箱外置转向架的轮轨力和车轮磨耗,对比分析2种转向架的安全性、平稳性以及线路适应性。研究结果表明:在保证2种转向架具有相同蛇行运动稳定性即临界速度的前提下,与轴箱外置转向架相比,内置转向架的轮轨力降低20%以上,车轮磨耗量和踏面磨耗深度降低30%以上,充分体现了轴箱内置转向架的动力学性能优越性。

Dynamics analysis of high-speed railway bogies with inner bearing and outer bearing suspensions

According to the structure types of vehicle suspension system,bogie is divided into the inner bearing bogie and outer bearing bogie.Compared with the outer bearing bogie,the inner bearing bogie has a more compact structure and little mass,which is conducive to pass small radius curved track and reduce wheel wear.The inner bearing bogie has better running adaptability.In this paper,the high-speed EMU at the speed of 350 km/h was taken as the research object.Considering the operating conditions of high-speed railway lines and existing lines,the wheel-rail force and wheel wear of the inner bearing bogie and outer bearing bogie have been calculated in dynamics simulation software SIMPACK.We have also compared the safety,stationarity and running adaptability performance of the two bogies.As the results shows,under the premise that the two bogies have the same hunting stability,that is,the critical speed.The wheel-rail force of the inner bearing bogie is reduced by more than 20%compared with the outer bearing bogie,and the wheel wear and tread wear depth are reduced by more than 30%.The results fully demonstrate the dynamic performance superiority of the inner bearing bogie.