Analysis of Running Safety and Ride Comfort According to the Shape of Transition Curve

완화곡선형상별 차량주행안전성 및 승차감 분석

  • 최일윤 (한국철도기술연구원 차륜궤도연구실) ;
  • 엄주환 (한국철도기술연구원 차륜궤도연구실) ;
  • 김만철 (한국철도기술연구원 차륜궤도연구실) ;
  • 박찬경 (한국철도기술연구원 차세대고속철도기술개발사업단)
  • Received : 2010.06.07
  • Accepted : 2010.09.06
  • Published : 2010.10.26

Abstract

Primary function of a transition curve is to accomplish gradual transition from the straight to circular curve, so that curvature changes from zero to a finite value. The transition curve enhances the running safety and ride comfort of the vehicle in curve. There are a couple of transition curve such as clothoid, cubic parabola and cosinusoidal curve, etc. In this study, running behaviors of cubic parabola and cosinusoidal curve were investigated and compared by numerical analysis result using VAMPIRE program. Ride comforts for an individual transition curve were evaluated for each transition curve and running behavior and safety were also evaluated to compare the capacity of transition curves.

곡선부에서 도입되는 완화곡선은 곡률을 점진적으로 변화시킴으로써 곡선부에서의 차량의 주행안전성 및 승차감을 향상시킨다. 이러한 완화곡선은 클로소이드, 3차포물선 및 사인반파장 등 여러 종류가 있다. 본 논문에서는 차량의 주행해석을 통하여 3차 포물선과 사인반파장 완화곡선의 주행거동 특성을 분석하였다. 각 완화곡선별로 승차감 평가와 주행안전성 평가를 통하여 각 완화곡선의 성능을 정량적으로 비교하였다.

Keywords

References

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