五种横向运动稳定性评价方法研究

Study on Lateral Stability Evaluation of High Speed Trains

以极限环方法作为理论依据,建立了高速车辆非线性动力学模型,通过改变抗蛇行减振器参数事先设定了三种工况。采用极限环评判方法得到对应的蛇行失稳临界速度分别为251、301、351km/h,同时应用TSI L84构架加速度幅值、UIC515构架加速度幅值、构架和轮对加速度均方根值、轮轨导向力均方根值方法进行三种工况横向稳定性的评判。结果表明,采用构架加速度幅值评判得到的临界速度高于极限环方法,而采用构架、轮对加速度均方根值和轮轨导向力均方根值评判方法得到的临界速度在速度高时往往要低于极限环方法。最后,对高速车辆蛇行失稳后运行平稳性进行了分析。

Based on the theory of limit cycle method, the nonlinear dynamic model of a high speed vehicle is set up.Three working conditions are determined in advance through changing the parameters of the anti-hunting dampers.By applying the limit cycle evaluation method,the corresponding hunting critical speeds for the three working conditions are calculated as 251,301,351km/h.Meanwhile,the methods of standard TSI L84 bogie frame acceleration amplitude,UIC515 bogie frame acceleration amplitude,bogie frame and wheelset acceleration RMS,sum of guiding forces RMS are used to evaluate the lateral stability of the vehicle system and the corresponding critical speeds are obtained.The numerical results show that the critical speed obtained by the method of bogie frame acceleration amplitude is higher than the limit cycle method,while the critical speeds obtained by the methods of bogie frame and wheelset acceleration RMS are normally lower than the limit cycle method at higher operating speeds.Finally,ride quality of the vehicle system after the loss of stability is investigated.