한국전산구조공학회논문집 (Journal of the Computational Structural Engineering Institute of Korea)

  • 제35권2호
  • /
  • Pages.131-140
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  • 2022
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  • 1229-3059(pISSN)
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  • 2287-2302(eISSN)
한국전산구조공학회 (Computational Structural Engineering Institute of Korea)
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유연다물체동적해석을 이용한 무도상교량 침목패드의 최적 강성 산정

Optimum Stiffness of the Sleeper Pad on an Open-Deck Steel Railway Bridge using Flexible Multibody Dynamic Analysis

  • 채수호 (한국교통대학교 철도융합기술연구소) ;
  • 김민수 (한국교통대학교 철도공학부) ;
  • 백인철 (한국철도공사 기술연구처) ;
  • 최상현 (한국교통대학교 철도공학부)
  • Chae, Sooho (Research Institute for Railway Convergence Technology, Korea National University of Transportation) ;
  • Kim, Minsu (School of Railroad Engineering, Korea National University of Transportation) ;
  • Back, In-Chul (Korea Railroad Co.) ;
  • Choi, Sanghyun (School of Railroad Engineering, Korea National University of Transportation)
  • 투고 : 2022.02.03
  • 심사 : 2022.02.09
  • 발행 : 2022.04.30
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초록

레일장대화는 무도상교량의 소음, 진동, 충격 등의 문제점을 해결할 수 있는 경제적인 방안 중 하나이며, 최근 연동식 침목고정장치를 이용한 SSF 공법이 개발된 바 있다. 이 연구에서는 연동식 침목고정장치 적용 시 레일 높이 조정 및 열차 통과 시의 충격 흡수를 목적으로 교량침목 하부에 삽입되는 침목패드의 최적 연직강성을 결정하는 과정을 제시하였다. 침목패드의 최적 연직강성 결정을 위하여 관련 기존 기준을 검토하였으며, 유연다물체동적해석을 통하여 침목패드의 연직강성 변화에 따른 주행안전성, 승차감 및 궤도의 안전성에 대한 지표들과 교량 응답 변화를 검토하였다. 유연다물체동적해석은 상용프로그램인 ABAQUS와 VI-Rail을 이용하여 수행하였다. 수치해석은 30m 상로판형교에 대한 교량모델을 이용하여 수행하였으며, 침목패드의 연직강성이 7.5kN/mm ~ 240kN/mm로 변화할 때 ITX 새마을, KTX 및 화차 통과 시의 응답을 산정하였다. 수치해석에 적용된 궤도구성품 조건에서 침목패드의 최적 강성은 100kN/mm로 산정되었다.

Installing Continuous Welded Rail (CWR) is one of the economical ways to resolve the challenges of noise, vibration, and the open-deck steel railway bridge impact, and the SSF method using the interlocking sleeper fastener has recently been developed. In this study, the method employed for determining the optimum vertical stiffness of the sleeper pad installed under the bridge sleeper, which is utilized to adjust the rail height and absorb shock when the train passes when the interlocking sleeper fastener is applied, is presented. To determine the optimal vertical stiffness of the sleeper pad, related existing design codes are reviewed, and, running safety, ride comfort, track safety, and bridge vibration according to the change in the vertical stiffness of the sleeper pad are estimated via flexible multi-body dynamic analysis,. The flexible multi-body dynamic analysis is performed using commercial programs ABAQUS and VI-Rail. The numerical analysis is conducted using the bridge model for a 30m-long plate girder bridge, and the response is calculated when passing ITX Saemaeul and KTX vehicles and freight wagon when the vertical stiffness of the sleeper pad is altered from 7.5 kN/mm to 240 kN/mm. The optimum stiffness of the sleeper pad is calculated as 200 kN/mm under the conditions of the track components applied to the numerical analysis.

키워드

과제정보

이 연구는 국토교통과학기술진흥원 철도기술연구사업(20RTRP-B137951-04)과 2020년 한국교통대학교의 연구비 지원에 의해 수행되었습니다.

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