高速铁路无砟轨道不平顺谱

研究提出了我国高速铁路无砟轨道不平顺谱的计算方法、轨道不平顺谱拟合公式及轨道不平顺谱图.为提高轨道不平顺谱的计算精度,研究提出了基于线性插值和小波分析方法的轨道不平顺检测数据异常值和趋势向剔除算法.同时通过不同窗函数长度、不同窗函数和不同谱估计方法的轨道不平顺谱计算对比分析,确定了轨道不平顺谱的计算方法.利用高速综合检测列车检测数据计算确定了高速铁路无砟轨道不平顺谱及其拟合公式,并引入倍频能量表反映高速铁路无砟轨道周期结构的影响.由轨道不平顺谱拟合公式与倍频能量表共同构成的高速铁路无砟轨道不平顺谱,为高速铁路设计、评估和养护维修等提供了依据.

PSD of ballastless track irregularities of high-speed railway

The calculation method, fitting function and fitting spectrum of power spectral density （PSD） of track irregularity were proposed in the paper. To improve the calculation accuracy of PSD of track irregularity, a linear interpolation method and a wavelet analysis method are given and used to eliminate the outliers and trends in the track irregularities. The paper describes the window function, window length and PSD estimation method to calculate track irregularity PSD. For comparison the track irregularity power spectral densities （PSDs） calculated with different window functions, window lengths and PSD estimation methods. Combing the above mentioned results and the data from the high speed comprehensive inspection train, the paper determines the track irregularity PSD fitting equation and introduces the frequency multiplication energy table to reflect the impact of track periodical structure of High Speed Railway. PSD of ballastless track irregularities of high-speed railway includes fitting spectrum and frequency multiplication energy table, which provides basis for maintenance and optimization design for High Speed Railway.