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Analysis of Ride Comfort of a High-Speed Train Based on a Coupled Track-Train-Seat-Human Model with Lateral, Vertical and Roll Vibrations

  • Jun Wu
  • Yi QiuEmail author
Conference paper
  • 10 Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

To study the ride comfort of a high-speed train running at a constant speed on a tangent track, a 3D rigid-flexible coupled track-train-seat-human model was developed. The flexible carbody model consisted of six plates with out-of-plane and in-plane vibrations interconnected by artificial springs, and was calibrated using a modal test available in a published paper. The ride comfort was evaluated by total equivalent acceleration calculated by the weighted root-sum-of-square of the weighted root-mean-square of lateral, vertical and roll accelerations at the feet, seat-buttock and human-backrest interfaces. It was concluded the track rigidity had the most influence on lateral, vertical and roll vibrations of the floor above 16 Hz, but had no obvious influence on ride comfort. The flexible carbody model showed intensified floor vibration in lateral, vertical and roll directions above 8 Hz compared with the rigid one, so rigid carbody model caused great underestimation of total equivalent acceleration. The total equivalent acceleration showed increasing tendency as increasing speed. For symmetrical seat positions, the equivalent accelerations showed analogous tendency as the speed. The ride comfort at the carbody center and close to the ends was the worst. Regardless of the seat position and speed, vertical acceleration on the seat pan was the most severe, followed by the vertical acceleration at the feet. The neighbouring subject usually resulted in reduced total equivalent acceleration. The damping of the carbody effectively reduced the total equivalent acceleration for every speed. The effect of the suspension stiffness and damping on ride comfort was also studied.

Keywords

High-speed train Ride comfort Track-train-seat-human model Lateral, vertical and roll vibrations 

References

  1. 1.
    Griffin, M.: Handbook of Human Vibration. Academic Press, London (1990)Google Scholar
  2. 2.
    Sun, W., Zhou, J., Thompson, D., Gong, D.: Vertical random vibration analysis of vehicle–track coupled system using Green’s function method. Veh. Syst. Dyn. 52(3), 362–389 (2014).  https://doi.org/10.1080/00423114.2014.884227CrossRefGoogle Scholar
  3. 3.
    Zhou, J., Goodall, R., Ren, L., Zhang, H.: Influences of car body vertical flexibility on ride quality of passenger railway vehicles. Proc. Inst. Mech. Eng., Part F: J. Rail Rapid Transit 223(5), 461–471 (2009).  https://doi.org/10.1243/09544097jrrt272CrossRefGoogle Scholar
  4. 4.
    Zhang, Y.W., Zhao, Y., Zhang, Y.H., Lin, J.H., He, X.W.: Riding comfort optimization of railway trains based on pseudo-excitation method and symplectic method. J. Sound Vib. 332(21), 5255–5270 (2013).  https://doi.org/10.1016/j.jsv.2013.05.018CrossRefGoogle Scholar
  5. 5.
    Standardization IOf,1997ISO 2631–1: Mechanical vibration and shock—Evaluation of human exposure to whole-body vibration—Part1: General requirements. ISO, SwitzerlandGoogle Scholar
  6. 6.
    Wickens, A.H.: Fundamentals of Rail Vehicle Dynamics: Guidance and Stability. Swets & Zeitlinger Publishers, Lisse (2003)CrossRefGoogle Scholar
  7. 7.
    Garg, V., Dukkipati, R.: Dynamics of Railway Vehicle Systems. Academic Press, INC LTD, London (1984)Google Scholar
  8. 8.
    Zhai, W., Wang, K., Cai, C.: Fundamentals of vehicle–track coupled dynamics. Veh. Syst. Dyn. 47(11), 1349–1376 (2009).  https://doi.org/10.1080/00423110802621561CrossRefGoogle Scholar
  9. 9.
    Lu, F., Kennedy, D., Williams, F.W., Lin, J.H.: Symplectic analysis of vertical random vibration for coupled vehicle–track systems. J. Sound Vib. 317(1–2), 236–249 (2008).  https://doi.org/10.1016/j.jsv.2008.03.004CrossRefGoogle Scholar
  10. 10.
    Cheli, F., Corradi, R.: On rail vehicle vibrations induced by track unevenness: analysis of the excitation mechanism. J. Sound Vib. 330(15), 3744–3765 (2011).  https://doi.org/10.1016/j.jsv.2011.02.025CrossRefGoogle Scholar
  11. 11.
    Di Gialleonardo, E., Braghin, F., Bruni, S.: The influence of track modelling options on the simulation of rail vehicle dynamics. J. Sound Vib. 331(19), 4246–4258 (2012).  https://doi.org/10.1016/j.jsv.2012.04.024CrossRefGoogle Scholar
  12. 12.
    Cao, H., Zhang, W., Miao, B.: Vertical vibration analysis of the flexible carbody of high speed train. Int. J. Veh. Struct. Syst. 7(2), 55–60 (2015).  https://doi.org/10.4273/ijvss.7.2.02CrossRefGoogle Scholar
  13. 13.
    Carlbom, P.: Carbody and passengers in rail vehicle dynamics. Institutionen för farkostteknik (2000)Google Scholar
  14. 14.
    Carlbom, P.: Combining MBS with FEM for rail vehicle dynamics analysis. Multibody Syst. Dyn. 6(3), 291–300 (2001)CrossRefGoogle Scholar
  15. 15.
    Carlbom, P., Berg, M.: Passengers, seats and carbody in rail vehicle dynamics. Veh. Syst. Dyn. 37(sup1), 290–300 (2002).  https://doi.org/10.1080/00423114.2002.11666240CrossRefGoogle Scholar
  16. 16.
    Ling, L., Zhang, Q., Xiao, X., Wen, Z., Jin, X.: Integration of car-body flexibility into train–track coupling system dynamics analysis. Veh. Syst. Dyn. 56(4), 485–505 (2018).  https://doi.org/10.1080/00423114.2017.1391397CrossRefGoogle Scholar
  17. 17.
    Tomioka, T., Suzuki, Y., Takigami, T.: Three-dimensional flexural vibration of lightweight railway vehicle carbody and a new analytical method for flexural vibration. Q. Rep. RTRI 44(1), 15–21 (2003)CrossRefGoogle Scholar
  18. 18.
    Tomioka, T., Takigami, T., Suzuki, Y.: Numerical analysis of three-dimensional flexural vibration of railway vehicle car body. Veh. Syst. Dyn. 44((sup 1)), 272–285 (2006).  https://doi.org/10.1080/00423110600871301CrossRefGoogle Scholar
  19. 19.
    Zhai, W.M., Wang, K.Y., Lin, J.H.: Modelling and experiment of railway ballast vibrations. J. Sound Vib. 270(4–5), 673–683 (2004).  https://doi.org/10.1016/s0022-460x(03)00186-xCrossRefGoogle Scholar
  20. 20.
    Wu, J., Qiu, Y.: Modelling of a train seat with subject exposed to lateral, vertical and roll vibration. J. Phys: Conf. Ser. 1264, 012018 (2019)Google Scholar
  21. 21.
    Knothe, K.L., Grassie, S.L.: Modelling of railway track and vehicle/track interaction at high frequencies. Veh. Syst. Dyn. 22(3–4), 209–262 (1993).  https://doi.org/10.1080/00423119308969027CrossRefGoogle Scholar
  22. 22.
    Wu, J., Qiu, Y.: Ride comfort analysis of high-speed train based on geometry filter effect of carbody bending. In: Paper Presented at the 52nd Human Response to Vibration Conference & Workshop, Cranfield University, UK (2017)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Institute of Sound and Vibration ResearchUniversity of SouthamptonSouthamptonUK

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