Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지

Investigation on the Safety of TTX in Strong Cross wind

강한 측풍에 대한 한국형 고속 틸팅 열차의 안전성 고찰

  • Published : 2007.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The Korean Tilting Train eXpress (TTX) development program is in progress for the purpose of running speed or passenger's comfort improvement at the curved track. However, the speed up and light weight of train make poor the dynamic safety of the TTX in strong cross wind. In this paper, 3-dimensional numerical analysis on the flow field around the TTX under strong cross wind is performed for each operating condition, such as the train speed, cross wind speed, tilting/nontilting condition, and so on. Due to the strong cross wind, the pressure distribution around the train becomes asymmetric, especially at the leading car. Asymmetrical pressure distribution causes the side force and strong unstability. The side force on the train is proportional to the train speed and cross wind speed. Based on the numerical results, the overturning coefficients are predicted for investigation of the train stability, and all of them are less than the critical value, 0.9. The results in this study would be a good data for providing importance to judgement of cross wind safety of TTX.

Keywords

References

  1. T. Johnson (1996), 'Strong wind effects on railway operations - 16th October 1987', Journal of Wind Engineering and Industrial Aerodynamics, vol.60, 251-266 https://doi.org/10.1016/0167-6105(96)00038-4
  2. Toshiaki Imai, Toshishige Fujii, Katsuji Tanemoto, Taisuke Shimamura, Tatsuo Maeda, Hiroaki Ishida, Yu Hibino (1994), 'New train regulation method based on wind direction and velocity of natural wind against strong winds', Journal of Wind Engineering and Industrial Aerodynamics, vol.90, 1601-1610 https://doi.org/10.1016/S0167-6105(02)00273-8
  3. C.J. Baker (2003), 'Measurements of the cross wind forces on trains', The World Congress on Railway Research
  4. E Andersson, J Haggstrom, M sima and S stichel, 'Assessment of train-overturning risk due to strong cross-winds', Proc. Instn Mech. Engrs Vol. 218 Part F: J.Rail and Rapid Transit
  5. Gerd Matschke, Peter Deeg, Burkhard chulte-Werning (2001), 'Effects of Strong Cross Winds on High-Speed Trains：A methodology for risk assessment and development of countermeasures', The World Congress on Railway Research, Cologne
  6. Gerd Matschke, Thorsten Tielkes, Peter Deeg, Burkhard Schulte-Werning (2000), 'Effects of Strong Cross Winds on High-Speed Trains-a Risk Assessment Approach', International Conference of Probabilistic Safety Assessment and Management, Osaka, Japan
  7. P-E Gautier, T Tielkes, F Sourget, E Allain, M grab, C Heine (2003), 'Strong wind risks in rilways: the DEUFRAKO crosswind program', The World Congress on Railway Research
  8. R.G. Gawthorpe (1994), 'Wind effects on ground transportation', Journal of Wind Engineering and Industrial Aerodynamics vol.52, 73-92 https://doi.org/10.1016/0167-6105(94)90040-X
  9. B Diedrichs, M Ekequist, S Stichel, H Tengstrand (2004), 'Quasi-static modelling of wheel-rail reactions due to crosswind effects for various types of high-speed rolling stock', Proc. Instn Mech. Engrs Vol. 218 Part F: J.Rail and Rapid Transit
  10. 윤수환 (2005), '한국형 틸팅 차량의 측풍 안전성에 대한 수치 해석적 연구', 서울대학교 공과대학 기계항공공학부 공학석사학위논문
  11. 윤수환, 구요천, 김태윤, 고태환, 이동호 (2005), '수치 해석 방법 을 이용한 한국형 틸팅 차량의 측풍 안전성 고찰', 한국전산유체학술대회 논문집, pp.109-113
  12. Fluent Inc., Fluent & Gambit user's manual