• Title, Summary, Keyword: Autonomous roughness measuring device

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Effect of Design variables of Rail Surface Measuring Device on Acoustic Roughness and Spectral Analysis (레일표면 측정장치의 설계변수가 음향조도 스펙트럼 분석에 미치는 영향)

  • Jeong, Wootae;Jeon, Seungwoo;Jeong, Dahae;Choi, Han Shin
    • Journal of the Korean Society for Railway
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    • v.20 no.4
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    • pp.440-447
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    • 2017
  • Spectrum level for the acoustic roughness of wheels and rail surface should be periodically maintained under the limitation of ISO to reduce rolling noise of railway vehicles. Thus, in maintaining railway track, displacement sensor-based measuring devices are broadly used to measure the surface roughness and to perform spectral analysis. However, these measuring devices cause unexpected measuring errors since the displacement sensors are fixed at moving platforms and the main frame produces pitching motion during measurement. To increase the accuracy of the measured values, this paper has investigated the effects of design variables such as wheel base, additional wheels, and elastic deformation of wheels on the surface roughness and acoustic roughness spectrum.