中文摘要：

结合合武客运专线有砟轨道不平顺检测数据,针对客运专线有砟轨道结构1~50 m波长范围内的不平顺特性开展实测分析。采用非周期图法对有砟轨道不平顺的功率谱密度函数进行估计;对半年内轨道不平顺功率谱的变化规律进行分析;对客运专线轨道不平顺功率谱值随波长的变化特性进行分析,并与当前国内外的通用谱进行对比分析;利用非线性最小二乘优化算法对客运专线有砟轨道结构的不平顺谱密度函数进行拟合,提出客运专线有砟轨道不平顺谱拟合公式。研究结果表明,温度变化对高低、轨向不平顺谱的影响非常显著;在分析波长范围内,大部分区段内的客运专线轨道不平顺功率谱值低于德国低干扰谱或者与德国低干扰谱相当,仅有小部分区段内高于德国低干扰谱。

英文摘要：

Based on the irregularities measured data by track inspection car from Hefei- Wuhan Passenger Dedicated Line,the ballast track irregularity characteristics of middle and long irregularities with the wave- length range of 1 ~ 50 m was analyzed. By using of Welch methods,the changing discipline of ballast track irregularities power spectrum were analyzed. And the average spectrum of He- Wu Passenger Dedicated Line ballast track was compared with domestic and foreign standard spectrums. The irregularities power spectrum fitting functions were studied by the least squares optimization algorithm. The results show that the change of temperature will produce great impact on profile irregularities and direction irregularities. In the range of wavelength analyzed,the most track irregularities spectrum of passenger dedicated line are equal to or lower than Germany high- speed irregularities＇ spectrum. And only in small wavelength range,track irregularities spectrums of passenger dedicated line are higher than that of Germany high- speed irregularities.