普速铁路动静态轨道不平顺相关性研究

Research on Correlation Between Dynamic and Static Track Irregularities of Normal Speed Railway

通过研究动静态波形对齐算法,对动静态轨道不平顺数据进行预处理,利用时域和频域方法研究动静态检测数据的相关性并分析其差异产生的原因。结果表明:动静态高低、轨向相关系数在0.60~0.80,属于强相关;动静态轨距、水平、三角坑相关系数不小于0.90,属于极强相关。动静态高低、轨向谱密度有明显差异,主要是动静态高低和轨向测量基准不同引起的;动静态水平和三角坑谱密度在波长10 m以上接近,在10 m以下差异较大,主要是左右轨下刚度差异引起的;动静态轨距谱密度比较接近。动静态高低、轨向在波长5~25 m内的相干函数大于0.8,在25~100 m内大于0.6,在5 m之下波动较大;动静态轨距水平、三角坑在波长5.2~100 m内的相干函数大于0.8;动静态轨距在波长2.8~100 m内的相干函数大于0.8。

By studying the dynamic and static waveform alignment algorithm,the dynamic and static track irregularity data were preprocessed,and the correlation of the dynamic and static detection data was studied by using the timedomain and frequency-domain methods,and the reasons for the differences were analyzed.The results show that the dynamic and static height,alignment correlation coefficients are between 0.60 and 0.80,which belong to strong correlation.The correlation coefficient of dynamic and static gauge,level and triangular pit is not less than 0.90,which belongs to extremely strong correlation.There are obvious differences in dynamic and static heights and alignment spectral density,which are mainly caused by differences in dynamic and static heights and alignment measurement benchmarks.The dynamic and static horizontal and triangular pit spectral densities are close when the wavelength is more than 10 m,and the difference is large when the wavelength is below 10 m,which is mainly caused by the stiffness difference under the left and right rails.The spectral density of dynamic and static gauge is close.The coherence function of the dynamic and static height and the alignment is greater than 0.8 in the wavelength range of 5~25 m,greater than 0.6 in the wavelength range of 25~100 m,and fluctuates greatly when the wavelength is below 5 m.The coherence function of dynamic and static gauge level and triangular pit is greater than 0.8 in the wavelength range of 5.2~100 m.The coherence function of dynamic and static gauge is greater than 0.8 in the wavelength range of 2.8~100 m.