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Evaluation Methods of Carbody Hunting Instability of Railway Vehicles

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Abstract

In order to analyze and make the criterion of carbody primary hunting instability, the relationship among equivalent conicity, vehicle speed and hunting frequency has been analyzed firstly. To simulate different vehicles’ carbody hunting instability, this article analyzed the lateral acceleration signals of a simulated full-scale vehicle under several conditions. Through these data, an amendatory method for calculating centroid frequency of vehicle lateral vibration is presented and an index named power concentration ratio (PCR) is presented for distinguishing carbody primary hunting and the data with larger amplitude is screened under the ride index. According to the statistical law, the criterion of carbody primary hunting instability is summarized. Research result shows that the there is a vehicle carbody hunting instability while the lateral acceleration with filtered 0.5–3 Hz exceeds 0.5 m/s2 for six times serially in 15 s. The criterion is shown to be valid through the field test data.

Keywords

  • Carbody hunting instability
  • Evaluation method
  • Centroid frequency
  • Power concentration ratio
  • Ride index

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Correspondence to Yi Wu , Jing Zeng , Qunsheng Wang , Ren Luo or Bin Zhu .

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Wu, Y., Zeng, J., Wang, Q., Luo, R., Zhu, B. (2020). Evaluation Methods of Carbody Hunting Instability of Railway Vehicles. In: Klomp, M., Bruzelius, F., Nielsen, J., Hillemyr, A. (eds) Advances in Dynamics of Vehicles on Roads and Tracks. IAVSD 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-38077-9_105

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  • DOI: https://doi.org/10.1007/978-3-030-38077-9_105

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-38076-2

  • Online ISBN: 978-3-030-38077-9

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