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Study on the Rolling Noise Model Using an Analysis of Wheel and Rail Vibration Characteristics

철도 차륜 및 레일 진동 특성 해석을 통한 전동 소음 모델 연구

  • Jang, Seungho (Korea Railroad Research Institute) ;
  • Ryue, Jungsoo (School of Naval Architecture and Ocean Engineering, University of Ulsan)
  • Received : 2013.01.25
  • Accepted : 2013.04.18
  • Published : 2013.06.30

Abstract

Rolling noise is an important source of noise from railways; it is caused by wheel and rail vibrations induced by acoustic roughness at the wheel/rail contact. To reduce rolling noise, it is necessary to have a reliable prediction model that can be used to investigate the effects of various parameters related to the rolling noise. This paper deals with modeling rolling noise from wheel and rail vibrations. In this study, the track is modeled as a discretely supported beam by regarding concrete slab tracks, and the wheel vibration is simulated by using the finite element method. The vertical and lateral wheel/rail contact forces are modeled using the linearized Hertzian contact theory, and then the vibration responses of the wheel and rail are calculated to predict the radiated noise. To validate the proposed model, a field measurement was carried out for a test vehicle. It was found that the predicted result agrees well with the measured one, showing similar behavior in the frequency range between 200 and 4000 Hz where the rolling noise is prominent.

Acknowledgement

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

Supported by : 국토해양부

References

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