Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on Mechanical Parameters of a Wheelset Influencing Derailment of Rolling Stock

철도차량탈선에 영향을 미치는 윤축의 기계적 인자에 관한 연구

  • Oh, Hyun Sun (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology) ;
  • Koo, Jeong Seo (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology)
  • 오현석 (서울과학기술대학교 철도차량시스템공학과) ;
  • 구정서 (서울과학기술대학교 철도차량시스템공학과)
  • Received : 2013.01.22
  • Accepted : 2013.08.19
  • Published : 2013.10.01
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Abstract

It is difficult to predict derailment with the existing derailment coefficient like Nadal's formula which is based on the contact forces between one wheel and rail. A new derailment coefficient model developed on a wheelset is able to make a better estimate about the climb derailment, slip derailment, roll over derailment, and mixed derailment types of these. Moreover, not only the mechanical factors considered in the existing derailment coefficients but also other various factors affecting derailment such as wheel unloading and loading, diameter of wheel, and locations of axle-box bearings can be covered with this new derailment coefficient model. That is, the derailment patterns which couldn't be solved with the existing formulas such as Nadal's and Weinstock's models can be analyzed with this wheelset derailment coefficient model because of considering various factors causing derailment. Finally, the validity of the new derailment coefficient model is verified using dynamic model simulations.

나달식 등 한쪽 차륜과 레일의 접촉력에 기반한 기존 탈선계수식으로는 열차 주행 시 여러 가지 요인에 의해 발생하는 다양한 유형의 탈선을 이론적으로 예측하기 어렵다. 이를 보완하기 위하여 개발된 단일윤축 탈선계수는 타고오름탈선, 미끄러져오름 탈선, 전복탈선 및 이들의 복합유형 탈선을 잘 예측할 수 있고, 접촉부 마찰계수, 플렌지 각 등 기존의 탈선계수식에서 고려하던 기계적 인자뿐만 아니라 윤중감소/증가, 궤간, 차륜직경, 축상 베어링 위치 등 다양한 탈선영향인자들도 고려할 수 있다. 본 논문에서는 단일윤축 탈선계수식으로 이러한 다양한 탈선영향인자들을 고려하여 기존의 나달식, 바인스톡 식 등으로 구할 수 없었던 탈선현상을 분석한다. 마지막으로 동역학 시뮬레이션을 이용하여 이론적인 단일윤축 탈선계수식 결과들의 타당성을 입증한다.

Keywords

References

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