DOI QR코드

DOI QR Code

Assessment of Train Running Safety, Ride Comfort and Track Serviceability at Transition between Floating Slab Track and Conventional Concrete Track

플로팅 슬래브궤도와 일반 콘크리트궤도 접속구간에서의 열차 주행 안전, 승차감 및 궤도 사용성 평가

  • 장승엽 (한국철도기술연구원 고속철도연구본부) ;
  • 양신추 (한국철도기술연구원 고속철도연구본부)
  • Received : 2011.06.16
  • Accepted : 2011.11.03
  • Published : 2012.02.26

Abstract

It is of great importance to assure the running safety, ride comfort and serviceability in designing the floating slab track for mitigation of train-induced vibration. In this paper, for this, analyzed are the system requirements for the running safety, ride comfort and serviceability, and then, the behavior of train and track at the floating slab track including the transition zone to the conventional concrete slab track according to several main design variables such as system natural frequency, arrangement of spring at transition, spacing of spring isolators, damping ratio and train speed, using the dynamic analysis technique considering the train-track interaction. The results of this study demonstrate that the discontinuity of the support stiffness at the transition results in a drastic increase of the dynamic response such as wheel-rail interaction force, rail bending stress and rail uplift force. Hence, it is efficient to decrease the spacing of springs or to increase the spring constants at the transition to obtain the running safety and serviceability. On the other hand, the vehicle body acceleration as a measure of ride comfort is little affected by the discontinuity of the stiffness at the transition, but by the system tuning frequency; thus, to obtain the ride comfort, it is of great significance to select the appropriate system tuning frequency. In addition, the effects of damping ratio, spacing of springs and train speed on the dynamic behavior of the system have been discussed.

Acknowledgement

Supported by : 국토해양부

References

  1. H. G. Wagner (2002) Attenuation of transmission of vibrations and ground-borne noise by means of steel spring supported low-tuned floating track-beds, 2002 World Metro Symposium, Taipei.
  2. F. Cui, C. H. Chew (2000) The effectiveness of floating slab track system - Part I. receptance methods, Applied Acoustics, 61, pp.441-453. https://doi.org/10.1016/S0003-682X(00)00014-1
  3. C. M. Kuo, C.-H. Huang, Y.-Y. Chen (2008) Vibration characteristics of floating slab track, Journal of Sound and Vibration, 317, pp. 1017-1034. https://doi.org/10.1016/j.jsv.2008.03.051
  4. Z. G. Li, T. X. Wu (2009) On vehicle-track impact at connection between a floating slab and ballasted track and floating slab track's effectiveness of force isolation, Vehicle System Dynamics, 47(5), pp.513-531. https://doi.org/10.1080/00423110802167474
  5. A. Namura, K. Matsuo, S. Miura (1997) Introduction of buffers into a transitional track stiffness region, RTRI report, Vol.11, No.2, pp. 39-42 (in Japanese).
  6. Y. Momoya, K. Suzuki, A. Namura, K. Fuji, K. Ando (2001) Performance evaluation of floating track bed using coil springs, RTRI report, 15(4), pp.27-32.
  7. T. Watanabe, M. Sogabe, T. Yamazaki (2008) A study of running safety and ride comfort of floating slab track for highspeed train, Journal of Mechanical Systems for Transportation and Logistics, 1(1), pp. 22-30.
  8. Design Standards for Railway Structures and Commentary - Limit for displacement (2006) Railway Technology Research Institute, Railway Division, Ministry of Land and Transport (in Japanese).
  9. C. Esveld (2001) Modern Railway Track, 3rd ed., MRT productions.
  10. Y. Sato, S. Miura (1972) Tolerance of Bent-angle between Railway Structures Determined by Running Safety and Ride comfort, Railway Technical Research Report No.820, The Railway Technical Research Institute, Japanese National Railways (in Japanese).
  11. Standards for railway vehicle safety criteria (2008) Ministry of Land and Maritime of Korea (in Korean). (철 도차량 안전기준에 관한 규칙(2008), 국토해양부령 제4호 (2008.03.14 일부개정), 국토해양부)
  12. S.C. Yang, M.C. Kim, J.S. Kim (2000) Prediction of bending fatigue limits of rail welded parts, Journal of the Korean Society of Civil engineers, 20(1-D), pp. 97-106 (in Korean).
  13. S.C. Yang (2009) Enhancement of the finite-element method for the analysis of vertical train--track inter-actions, Proc. IMechE Part F: J. Rail and Rapid Transit, Vol. 223, pp. 609-620.
  14. A.K. Chopra (1995) Dynamics of Structures-Theory and Applications to Earthquake Engineering, Prentice Hall.
  15. S.C. Yang, C.K. Hong (2007) A method for the analysis of train/slab track interaction on settled roadbed, Journal of the Korean Society for Railway, 10(3), pp. 296-305 (in Korean).
  16. M.C. Kim (2003) Development of a quasi-three dimensional train/track/bridge interaction analysis pro-gram for evaluating dynamic characteristics of high speed railway bridges, Journal of Computational Stru-ctural Engineering Institute of Korea, Vol. 16, No.2, pp. 141-151 (in Korean).
  17. H.U. Lee (2006) A Study on the Analysis of Dynamic Behavior and Performance Evaluation Test of SCP Bridge, Final Report, Korea Railroad Research Institute, Shin-Sung Engineering & Construction Co. (in Korean).
  18. S.B. Seo (2002) Railway Track Engineering, revised edition, Eul & Al, Seoul (in Korean).
  19. R.G. Dong, R.V. Dukkipati (1994) A finite element model of railway track and its application to the wheel flat problem, Proc. IMechE Part F: J. Rail and Rapid Transit, Vo. 208, pp. 61-72.

Cited by

  1. Three Dimensional Model for Dynamic Moving Load Analysis of a PSC-I Girder Railway Bridge vol.16, pp.4, 2013, https://doi.org/10.7782/JKSR.2013.16.4.286
  2. Static and Dynamic Behavior at Low-Frequency Range of Floating Slab Track Discretely Supported by Rubber Mounts in Real-Scale Laboratory Test vol.15, pp.5, 2012, https://doi.org/10.7782/JKSR.2012.15.5.485
  3. A semi-analytical model of the train-floating slab track–tunnel–soil system considering the non-linear wheel/rail contact vol.232, pp.8, 2018, https://doi.org/10.1177/0954409718759879