한국철도학회논문집 (Journal of the Korean Society for Railway)

  • 제15권3호
  • /
  • Pages.251-256
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  • 2012
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  • 1738-6225(pISSN)
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  • 2288-2235(eISSN)
한국철도학회 (The Korean Society for Railway)
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뜬침목구간에서 차량/궤도 상호작용 수치해석기법 개발

Development of a Numerical Method of Vertical Train/Track Interaction in the Track Section with Hanging Sleepers

  • 양신추 (한국철도기술연구원 고속철도연구본부) ;
  • 이지하 (한국철도기술연구원 신교통연구본부)
  • 투고 : 2011.09.16
  • 심사 : 2012.03.16
  • 발행 : 2012.06.30
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초록

고속철도 자갈궤도에서 궤도틀림을 체계적이고 효율적으로 관리하기 위해서는 뜬 침목구간에서 차량이 궤도에 미치는 동하중의 특성을 파악할 필요가 있으며 이를 위해서는 뜬 침목을 고려한 차량과 궤도의 동적 상호작용해석기법의 개발이 필요하다. 본 연구에서는 초기 레일의 처짐이 없는 경우 궤광자중에 의하여 발생한 레일처짐(궤도틀림)과 처진 침목과 자갈도상간의 침목 들뜸량을 계산할 수 있는 해석기법을 개발하였고, 궤도틀림과 침목 들뜸량을 동시에 고려할 수 있는 차량과 궤도의 해석기법을 개발하였다. 본 해석기법의 타당성은 타문헌에서 제시한 해석결과와 비교를 통하여 검증하였다.

Hanging sleepers are frequently observed in the ballasted track with the rail of high rigidity. These hanging sleepers at the high speed line could cause such large dynamic force compared to those at the conventional line. This dynamic force would, in turn, deteriorate train running stability as well as riding comfort, and accelerate irregularity of track and failure of track materials, leading to a sharp increase in track maintenance cost. When the wheel-rail contact spring exhibits nonlinear behavior and some components of the system like hanging sleeper exhibit bi-linear behaviors, an effective analytical method is proposed for train-track interactions. The verification of the present method is carried out comparing numerical results by the present method and those by Ono's method of RTRI.

키워드

참고문헌

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