Comparative Study on Ride Comfort and Optimum Horizontal Curve Conditions for Superimposition of Vertical and Horizontal Curve

종곡선/평면곡선 경합여부에 따른 최적평면선형조건 및 승차감 비교 분석

  • 엄주환 (한국철도기술연구원 차륜궤도연구실) ;
  • 최일윤 (한국철도기술연구원 차륜궤도연구실) ;
  • 양신추 (한국철도기술연구원 차륜궤도연구실) ;
  • 이일화 (한국철도기술연구원 철도구조연구실) ;
  • 김만철 (한국철도기술연구원 차륜궤도연구실)
  • Received : 2010.10.14
  • Accepted : 2010.12.06
  • Published : 2010.12.06

Abstract

Superimposition of horizontal and vertical curves may hamper the ride comfort and running stability of train and largely affect the maintenance costs. However, in many cases, it is not easy to make a track alignment plan because of the geographic conditions or undesirable environmental factors. In this paper, a comparative study on the effect of superimposition of vertical and horizontal curve on the ride comfort and optimum horizontal curve conditions was performed. That is, optimal cant and ride comfort analysis with and without a vertical curve superimposed on the horizontal curve were evaluated. Also the superimposition effect on ride comfort and alignment conditions in high speed zone were evaluated. From the analysis results, it was found that the ride comfort is similar to that at the only horizontal curves when applying the compensation cant for the superimposed site.

철도에서 평면곡선과 종곡선의 경합은 승차감 및 열차의 주행안전성을 저해시키는 원인이 되며, 유지보수비용에도 큰 영향을 미친다. 그러나 철도노선 계획 시 지형조건 및 예기치 않은 환경적 요인에 의해 선형경합이 필요하게 될 경우가 발생된다. 본 연구에서는 종곡선과 평면곡선의 경합이 곡선부에서의 승차감 및 평면곡선의 최적선형조건에 미치는 영향을 파악하고자 하였다. 이를 위해 평면곡선과 종곡선이 경합하였을 경우와 경합하지 않고 평면선형만 있을 경우에 대한 최적캔트량 및 승차감을 비교분석 하였으며, 고속영역에서 선형 경합이 곡선선형조건과 승차감에 미치는 영향을 검토하였다. 그 결과 경합한 경우라도 보정캔트를 부설한다면 승차감 측면에서 평면선형만 부설한 경우와 유사한 조건이 될 수 있음을 알 수 있었다.

Keywords

References

  1. H. Baluch, "Optimation of transition length increase", Rail international, Vol 13. No.10, 1983.
  2. Shoichi Hashimoto, "Analysis of Relationship between Transition Curve Profile and Railway Vehicle's Vibration", RTRI Report, Vol.3. No.2. 1989.2.
  3. Bjorn Kufver, "Optimization of single horizontal curves in railway alignments", VTI report 424A, 1997.
  4. Bjorn Kufver, "Optimization of horizontal alignments for railways", Doctorial thesis, 2000.
  5. J.H. Um, S.C. Yang, E.K. Kim, I.Y. Choi, et.al. (2010) A study on evaluation method of ride comfort considering superimposition of vertical and horizontal curve, Journal of the Korean Society for Railway, 13(3), pp 309-316.
  6. UIC Code 518-OR (2005) "Testing and approval of railway vehicles from the point of view of their dynamic behaviour- Safety-Track fatigue-Ride quality", 3rd edition, International Union of Railway.
  7. ERRI B 153/RP 21 "Application of ISO Standard 2631 to railway vehicles", 1993.
  8. J.H. Um, E.K. Kim, S.C. Yang (2009), A study on determination method of radius and transition curve length for optimum design in curve, Journal of the Korean Society for Railway, 12(2), pp 199-204.