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<p>Hunting stability is the foremost and challenging research focus in railway vehicle dynamics. Although the yaw damper (YD) is a pivotal component for enhancing hunting stability, it also increases the coupling degree among various motion modes of the carbody-bogie. As a result, the YD transmit additional vibrations in multiple directions. To solve this trade-off, a novel hydraulically interconnected anti-hunting damping system (HIADS) is proposed. Firstly, the conceptual structure, operational principle, and nodal method-based system modelling of the HIADS are elucidated. The decoupled and general damping characteristics of the HIADS are then investigated. Finally, a comparison study is conducted to assess the effect of the YD and HIADS on the dynamics of the high-speed train (HST) operating at 400&#xa0;km/h. The simulation results reveal substantial improvements in hunting stability and ride comfort of the HIADS-equipped HST. The amplitude of lateral acceleration at the dominant vibration frequency of the bogie frame end decreased by up to 45.71%. On both straight and curved tracks, the dominant frequency of longitudinal vibration in the carbody central floor reduced significantly, from 17.07 to 2.73&#xa0;Hz and 16.92 to 2.48&#xa0;Hz, respectively, whereas the acceleration amplitude decreased by 92.68% and 74.07%, respectively. The HIADS achieves selective passive control for the bogie yaw mode, pioneering a new approach to controlling the bogie hunting oscillation.</p>

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A study of a novel hydraulically interconnected anti-hunting damping system for high-speed trains

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Mingxing Liu,
  • Nong Zhang,
  • Minyi Zheng,
  • Liang Luo,
  • Weimin Zhong,
  • Zhengfeng Yan

摘要

Hunting stability is the foremost and challenging research focus in railway vehicle dynamics. Although the yaw damper (YD) is a pivotal component for enhancing hunting stability, it also increases the coupling degree among various motion modes of the carbody-bogie. As a result, the YD transmit additional vibrations in multiple directions. To solve this trade-off, a novel hydraulically interconnected anti-hunting damping system (HIADS) is proposed. Firstly, the conceptual structure, operational principle, and nodal method-based system modelling of the HIADS are elucidated. The decoupled and general damping characteristics of the HIADS are then investigated. Finally, a comparison study is conducted to assess the effect of the YD and HIADS on the dynamics of the high-speed train (HST) operating at 400 km/h. The simulation results reveal substantial improvements in hunting stability and ride comfort of the HIADS-equipped HST. The amplitude of lateral acceleration at the dominant vibration frequency of the bogie frame end decreased by up to 45.71%. On both straight and curved tracks, the dominant frequency of longitudinal vibration in the carbody central floor reduced significantly, from 17.07 to 2.73 Hz and 16.92 to 2.48 Hz, respectively, whereas the acceleration amplitude decreased by 92.68% and 74.07%, respectively. The HIADS achieves selective passive control for the bogie yaw mode, pioneering a new approach to controlling the bogie hunting oscillation.