轨道不平顺数据分析程序研究

Study of track irregularities program

利用Matlab软件编写的轨道不平顺数据分析程序能够对轨检车测得的不平顺数据进行处理,得到功率谱密度分布函数。轨道不平顺分析程序包括轨道不平顺数据预处理、轨道不平顺谱分布函数计算以及根据实测的车体振动加速度,对轨道不平顺与车体振动加速度进行相干分析、提出对行车运行有不利影响的不平顺波长范围等。研究结果表明:车辆的动力特性与轨道不平顺有密切关系。高低不平顺对车体垂向振动影响显著,轨向不平顺对车体水平振动影响显著,水平不平顺对列车垂向、横向振动均有显著影响。

Track irregularities program via Matlab Program was proposed.The methods include track irregularities pre-processing,the statistic of track irregularities calculation and irregularities spectrum analysis.Using coherence function,the mutual relation between track irregularities spectrum and the car vibration acceleration was presented.The analysis shows： The relation between track irregularities and vehicles dynamical characteristics is close：the vertical irregularities have significant influence on the car vertical vibration;and the direction irregularities have significant impact on the car transverse vibration;and horizontal irregularities have significant impact on both vertical vibration and transverse vibration.