현 기반의 레일 표면 조도 측정과 해석

초록

The acoustic roughness refers to the roughness value in the wavelength range associated with rolling noise caused by excited vibrations due to the non-uniformity of the train wheels and rail surfaces when driving a railway vehicle. Therefore, it is important that to measure and analyze the acoustic roughness of rail surface in terms of noise countermeasures and track maintenance. This research developed rail surface measuring device based on displacement sensor, analytically analyzed the chord-based rail surface roughness to compensate for unstable measurement values of the mobile platform, analyzed the sensitivity according to the variation of design parameter and consequentially improved reliability of measurement results.