空气弹簧在100%低地板轻轨车上应用可行性分析

FEASIBILITY ANALYSIS OF AIR SPRING IN 100%LOW FLOOR LIGHT RAIL VEHICLE

基于多体动力学仿真软件SIMPACK,对某型采用纵向耦合边驱电机转向架的100%低地板轻轨车三模块编组建模,在MATLAB/Simulink中对其中央悬挂部件空气弹簧的主气室、节流孔、附加气室建模.对100%低地板轻轨车运行工况进行设定,通过联合仿真的方式对空气弹簧在100%低地板轻轨车上应用可行性进行分析,得到:1)空气弹簧应用到100%低地板车上后,车辆蛇行失稳临界速度为149km/h,大于设计时速,车辆有较好的运行稳定性.2)车辆运行时,平稳性及最大加速度指标均小于2.5,车辆有较好的运行平稳性.3)车辆通过小半径曲线时,轮重减载率、脱轨系数、轮轴横向力、轮轨横向力指标均小于评判标准限值,车辆有较好的曲线通过能力.4)空气弹簧在通过工况设定的小半径曲线时,各项性能指标均符合该型空气弹簧技术标准,空气弹簧在100%低地板轻轨车上应用可行.

A three-module marshaling model for a 100%low floor light rail vehicle with longitudinal coupled side-motor drive bogies was built by using the multi-body dynamics simulation software SIMPACK.The main plenum,orifice,and additional plenum of the central suspension air spring were modeled by MATLAB/Simulink.The operating conditions of the 100%low-floor light rail vehicles were set,and the feasibility of using air springs in the 100%low-floor light rail vehicle were analyzed by co-simulation combining SIMPACK and MATLAB/Simulink.The results indicated that both the vehicle stability and curve passing ability are improved after using the air spring.Specifically,the critical speed of hunting instability is increased to 149 km/h,which is higher than the design speed.Both the stability and the maximum acceleration index are less than 2.5 as the vehicle runs.When the vehicle passes through a small-radius curve,all the wheel load reduction ratio,derailment coefficient,wheel lateral force,and wheel rail lateral force are less than the evaluation standard limit,and all the performance indices meet the technical standards of this type of air spring.Therefore,the application of air spring to the 100%low-floor light rail vehicle is feasible.