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利用国内外实测轨道不平顺归纳出的轨道谱公式进行数值反演,重新得到的时域历程是开展车辆动力学性能研究,进行轨道车辆动态仿真、实车激振试验的重要输入。分析了几种反演的轨道不平顺信号,发现某些时域信号存在着明显的周期性和空白频段现象。采用基于功率谱的白噪声窗口式滤波法生成的轨道不平顺较好地避免了以上问题,生成的轨道不平顺时域信号用于轨道车辆运行时的动力学性能仿真,结果与试验数据有较好的一致,表明该反演方法得到的轨道不平顺在动力学仿真计算中具有较好的适用性。
The numerical inversion of the orbital spectrum formula deduced by the measured orbit irregularities at home and abroad is used to reconstruct the time history of the vehicle, which is an important input for carrying out research on vehicle dynamics performance, performing dynamic simulation of rail vehicles and exciting test of real vehicles. Several inversed orbit irregular signals were analyzed and it was found that some time-domain signals had obvious periodic and white-space phenomena. The above problems are avoided by the track irregularities generated by the white noise window filtering based on the power spectrum. The generated track irregular signal is used to simulate the dynamic performance of the railway vehicle. The result is in good agreement with the experimental data The good agreement indicates that the track irregularity obtained by the inversion method has good applicability in dynamic simulation.