铁路客运列车悬架参数稳健性设计

Robust design of suspension parameters for railway passenger train

铁路车辆的悬架参数对车辆运行平稳性和舒适性具有重要的影响。为了保证车辆在动态变化的运行工况下具有良好的稳定性,对车辆悬架参数稳健性进行设计。综合考虑车辆一系悬挂和二系悬挂的车辆六自由度垂向动力学模型与悬架参数对运行平稳性的影响。采用田口方法稳健性设计原理,研究确定了车辆悬架参数稳健性设计流程及悬架设计参数中的可控因素和外界噪声因素。在此基础上,进行悬架参数内外正交表设计,并利用Matlab编程分析计算了在多种典型工况下的运行平稳性指标值。分析结果表明:通过对多种工况下车辆Sperling指标和信噪比的分析比较,得到了稳健性最优的悬架参数组合,较好地解决了变工况下车辆悬架刚度和阻尼的匹配问题。

Suspension parameters of railway vehicles have an important influence on ride quality and ride comfort of vehicles.In order to guarantee a good ride quality under dynamic changes of running condition,robustness is designed to vehicle suspension parameters.A 6 freedom degree vertical dynamics model is introduced with comprehensive consideration of primary and secondary suspension,and suspension parameters on the effect of ride quality is described in the vertical dynamics model.Through Taguchi robust design theory,the robust design process of vehicle suspension parameters and the controllable factors and external noise factors of suspension design parameters are studied and determined.On this basis,internal and external orthogonal tables are designed about suspension parameters,and the evaluation indicators of vehicle ride quality are calculated under all kinds of typical working conditions by Matlab programming.Analysis results show that optimization and robust design of vehicle suspension parameters are achieved by comparing Sperling index with signal to noise ratio,and a good solution for reasonable matching between vehicle suspension stiffness and damping is provided under changing running conditions