客运专线新建线路轨道不平顺功率谱分析

通过对新建铁路轨道不平顺谱密度的分析，可以了解轨道平顺状态，有利于指导轨道施工和线路养护等作业。以秦沈客运专线轨检车实测轨道不平顺数据为统计样本，基于样本平稳性检验，采用FFT方法进行样本空间谱的估计，并由MATLAB编程得到轨道不平顺谱密度。基于轨道高低不平顺样本的总体平均，对所得到的谱密度进行频率平滑，并与我国一级铁路干线的谱密度曲线进行了对比分析：在此基础上，对秦沈客运专线的轨道状态进行了评估。

Power spectrum density analysis of track irregularity of newly-built railway line for passenger

By analyzing PSD of newly - built railway track irregularity, we can learn better about the state of track regularity and it profits instruct the track construction and railway maintenance. The specimen used by this paper is collected by track geometry inspection car from Qin - Shen special line for passenger transport. Based on the stable character proving of the specimen, we used FFT methods to evaluate the whole specimen space and used MATLAB soft to get the PSD of track irregularity. Based on the population averaging to the specimen, we made frequency smoothing to the PSD and analyzed it by comparing the PSD of the first main - line of our country. Then we evaluated the track state of Qin - Shen special line for passenger transport.