2006•Zhongguo tiedao kexueRequires access
Program for Rail Irregularity Analysis
Lian Song-liang, Yang Wenzhong
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Abstract
Track irregularity is one of the factors that make the increase of car body vibration,wheel-rail interaction force and wheel-rail noise.The degree of car body vibration has a close relation with track irregularity.The detrimental track irregularity wavelengths which impact the vehicle vibration prolongs with the increase of train speed.In wheel-rail noises,rolling noise is closely related to the corrugation of rail surface.The program for rail irregularity analysis processes the track irregularity data measured by track inspection car to obtain the distribution function of power spectrum density(PSD).By using this distribution function,the track irregularity distribution on each wavelength can be analyzed.According to car body vibration measured by track inspection car, coherent analysis of track irregularity and car body vibration is carried through.The detrimental rail irregularity wavelengths that make the increase of car body vibration can be determined,so that the rail irregularity with detrimental wavelengths can be maintained in pertinence.