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Comparison of Track Vibration Characteristics for Domestic Railway Tracks in the Aspect of Rolling Noise

철도 전동 소음의 관점에서 해석한 국내 철도의 진동 특성 비교

  • Ryue, Jungsoo (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Jang, Seungho (Korea Railroad Research Institute)
  • Received : 2012.10.19
  • Accepted : 2013.02.18
  • Published : 2013.04.28

Abstract

An important source of noise from railways is rolling noise caused by wheel and rail vibrations induced by acoustic roughness at the wheel-rail contact. The main contributors to rolling noise are the sleepers, rail, and wheels. In order to analyze and predict rolling noise, it is necessary to understand the vibrating behaviors of railway tracks, as well as of the wheels. In the present paper, theoretical modeling methods for railway track are reviewed in terms of rolling noise; these methods are applied for the three representative types of domestic railway tracks operated: the conventional ballasted track, KTX ballasted track and KTX concrete track. The characteristics of waves propagating along rails are investigated and compared among the types of tracks. The tracks are modeled as discretely supported Timoshenko beams and are compared in terms of the averaged squared amplitude of velocity, which is directly related to the sound radiation from the rails.

Acknowledgement

Grant : 400km/h 고속철도 소음원 모델 구축 및 소음원 기여도 분석 기술 개발

Supported by : 국토해양부

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Cited by

  1. Characteristics of Vibration and Sound Radiated from Rails of Concrete Slab Tracks for Domestic High Speed Trains vol.23, pp.7, 2013, https://doi.org/10.5050/KSNVE.2013.23.7.605
  2. Theoretical Analysis on the Array Microphone Measurement for Noise from Rails vol.33, pp.4, 2014, https://doi.org/10.7776/ASK.2014.33.4.238