朔黄重载铁路轨道不平顺谱分析  

Track irregularity spectrum analysis of Shenchi—Huanghua Heavy Haul Railway

作　　者：徐磊[1,2] 陈宪麦[1,2] 李晓健[3] 孟宪洪[3] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]高速铁路建造技术国家工程实验室,湖南长沙410075 [3]朔黄铁路发展有限责任公司,甘肃肃宁062350

出　　处：《中南大学学报（自然科学版）》2013年第12期5147-5153,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51008315)

摘　　要：以朔黄重载铁路轨检数据为样本，对德国高、低干扰谱和朔黄重载铁路轨道不平顺实测谱进行对比分析，结果表明：朔黄重载铁路在8．4m以上长波不平顺控制较好，但在1—2．5m波段的短波窄带凸形峰及尖峰谱线较为突出，同时在2．8，6．2及24m等波长处的轨道周期性不平顺仍需加以控制。同时，对样本数据统计、计算分析，得到了朔黄重载铁路的拟合谱密度函数结构形式及建议谱的特征参数，通过与国内统计谱函数拟合效果对比，结果表明，朔黄重载铁路拟合谱密度函数拟合性能更好。最后，初步提出了基于PSD．HHT的轨道不平顺时频分析方法，为科学评价、管理铁路轨道的平顺状态，提高我国轨道管理的科学技术水平提供了一条可行的途径。According to the track geometry data collected by track recording vehicles from Shenchi--Huanghua Heavy Haul Railway, the comparative analysis was conducted between German railway spectra of high irregularity and low irregularity and the actual measurement track irregularity spectra of Shenchi-Huanghua Heavy Haul Railway. The result shows that： the Shenchi--Huanghua Heavy Haul Railway has controlled well at the long-wavelength irregularity above 8.4 m, but the narrow-bandwidth profile peaks and spike spectral lines at the wave band of 1-2.5 m are distinctive. At the same time, the rail track periodical irregularity at the wavelength of 2.8, 6.2 and 24 m still need to be controlled. Meanwhile, through the data statistic and computational analysis for the sample, the structural style for the fitting spectrum density function and the characteristic parameters of the propositional spectrum are obtained by contrasting the fitting effect with the national statistical spectral function. The fitting performance of Shenchi-Huanghua Heavy Haul Railway Fitting spectrum density function is better. At last, the track irregularity time-frequency analyze method based on the PSD （Power spectrum Density）-HHT （Hilbert-Huang Transform） was proposed. The method it is a feasible way to scientific evaluate, manage the smooth state of railway track, and improve our country＇s scientific and technological level for track management.

关 键 词：朔黄重载铁路 轨道不平顺谱 拟合谱 希尔伯特-黄变换(HHT) 时-频分析 

分 类 号：U216.4[交通运输工程—道路与铁道工程]