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SHI Huai-long, WU Ping-bo, CENG Jing, ZHANG Da-fu. Flexibility characteristics of suspension system for railway vehicle[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 45-52.
Citation: SHI Huai-long, WU Ping-bo, CENG Jing, ZHANG Da-fu. Flexibility characteristics of suspension system for railway vehicle[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 45-52.
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Flexibility characteristics of suspension system for railway vehicle

  • State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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  • Author Bio:

    SHI Huai-long(1986-), male, doctoral student, +86-28-86466221, hl_shi@126.com

    WU Ping-bo(1968-), male, professor, PhD, +86-28-87600882, wupingbo@163.com

  • Received Date: 2014-03-15
  • Publish Date: 2014-08-25
    Abstract
  • A mathematical model of a railway vehicle equipped with air springs was built, the theoretical formulas of flexibility coefficient for suspension system were deduced, and the effects of suspension parameters on the coefficient were studied.Gravity method, angle measuring method and acceleration measuring method were designed to measure the coefficient.Gravity method was applied to measure the coefficients of motor car and trailer under different superelevation and loading conditions respectively.Theoretical analysis result shows that the greater the stiffness and lateral distance of suspension system are, and the lower the centers of gravity for carbody and frame are, the smaller the flexibility coefficients are, which can improve the antioverturning performance of vehicle.Test result illustrates that the coefficient of trailer is greater than that of motor car with a difference of 0.021 under unloading condition, but little divergence under loading condition.The coefficient under loading condition is greater than the coefficient under unloading condition with a maximum divergence of 0.109, and the severe situation occurs under loading condition for trailer with the maximum value of 0.245.The coefficient increases with the increase of super-elevation of outer rail, and the greater the super-elevation is, the more rapid the coefficient increases, which means that the flexibility should be controlled seriously for large super-elevation track.The credibility of theoretical analysis is verified and validated by test result, and the obtained formulas are reasonable and include comprehensive suspension parameters.

     

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