摘要
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。
Based on the measured data of railway track,this paper summarizes the formula of track spectrum,obtains the time-domain course which inputs research of rail vehicle dynamics performance to conduct train dynamic numerical simulation and real train test.Through analysis of several railway track geometry signals,a clear cyclical and blank-band phenomenon is found in some time-domain signals.In this paper,the white noise window-type filter based on the power spectrum density for inversion of track irregularity is discussed,which could effectively avoid the above problems,and a numerical simulation for train dynamic run-time performance is conducted.The results and experimental data have a good agreement,indicating that the inversion method for railway track has wide applicability.
出处
《城市轨道交通研究》
北大核心
2010年第7期20-23,共4页
Urban Mass Transit
关键词
轨道不平顺
功率谱密度
数值反演
车辆动力学
动态数值仿真
railway track irregualarity
power spectral density
numerical inversion
vehicle dynamics
dynamic numerical simulation
