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Complex vibration analysis of railway vehicle with tread conicity variation

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Abstract

This paper investigates the influence of tread conicity variation on hunting dynamical changing features for railway vehicle. Nonlinear contact force between wheels and rail is estimated by Vermeulen–Johnson creep force law. And a piecewise linear function is employed to appropriate the collision between wheel flange and rail. Hunting asymmetrical motions are analyzed by lateral bifurcation behaviors between maximum and minimum of car body lateral displacement. The result shows that the critical speed decreases with the increase in tread conicity, while the speed gap between linear and nonlinear speeds is narrowing. Compared with wheelsets, lateral amplitudes of the bogies are vulnerable to the tread conicity and decrease gradually. Besides, more asymmetrical motions are put into consideration with regard to tread conicity variation. Similarly, one asymmetrical behavior with small amplitude difference originates from the same chaotic attractor at both sides. And small interactive amplitude jumps in two sides at chaotic or periodic occasions are revealed. Distinguishingly, the other new asymmetrical type is found at a certain tread conicity that amplitudes of the hunting motion in positive and reverse directions no longer coincide and go away in opposite directions when the tread conicity increases to a certain value. And this particular asymmetrical motion disappears with further growth of tread conicity.

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Acknowledgements

This work has been supported by National Natural Science Foundation of China (11790282) and National Key R&D Program of China (2018YFB1201702).

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Authors and Affiliations

  1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, Sichuan, People’s Republic of China

    Yong Yan, Jing Zeng & Jian Mu

  2. School of Physics and Electronic Information Engineering, Ningxia Normal University, Guyuan, 756000, Ningxia, People’s Republic of China

    Yong Yan

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  1. Yong Yan
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  2. Jing Zeng
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Correspondence to Yong Yan.

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Yan, Y., Zeng, J. & Mu, J. Complex vibration analysis of railway vehicle with tread conicity variation. Nonlinear Dyn 100, 173–183 (2020). https://doi.org/10.1007/s11071-020-05498-6

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