关于轨道谱面积与TQI指标关系的研究

Study on the Relationship Between Track Irregularity Spectrum Area and Track Quality Index

根据沪昆和金温两条不同线路的轨道不平顺检测数据,利用Matlab编程分别进行功率谱和TQI分析。然后利用梯形积分公式对各项轨道不平顺谱值进行积分,得出TQI单项指数与各轨道不平顺谱面积值具有很好的相关性,特别是在高低和轨向不平顺上,相关系数达到了0.91以上,从而验证了用轨道不平顺功率谱方法来控制和管理轨道平顺性的可靠性。最后建议将轨道不平顺功率谱作为控制提速线路轨道质量的主要指标之一。

This paper makes PSD （ Power Spectral Density） and TQI （ Track Quality Index） analysis based on the track geometry data measured from Shanghai-Kunming and Jinhua-Wenzhou railways via Matlab program. Then it calculates the integral of each track irregularity spectrum values by the means of trapezoidal integration. The results show that each Track Quality Index has a close relationship with the track irregularity spectrum area. Especially with vertical irregularity and alignment irregularity, the correlation values reach 0.91. Consequently, it proves the reliability of appraising the track quality with PSD analysis. Finally, the track irregularity spectrum is proposed as one of the main indexes to control the track geometric irregularity for speed-up railway.