Shimmy mechanics and nonlinear vibration characteristics of monorail vehicle

IF 4.3 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration Pub Date : 2025-05-01 DOI:10.1016/j.jsv.2025.119158

Shiqiao Tian , Kai Zhou , Yanzhao Liang , Huailong Shi , Lai Wei , Wenlin Shen , Jing Zeng , Kaiyun Wang

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Abstract

This study investigates the nonlinear vibration characteristics of a monorail vehicle equipped with tires. A 3-degree-of-freedom dynamic model of the monorail vehicle's bogie was first established. Numerical simulations identified a limit cycle in the system, manifesting as shimmy vibration in the bogie's yaw, coupled with roll motion. The trajectory equations of the limit cycle were derived, and its occurrence conditions and system equilibrium points were analyzed. The influence of key bogie parameters on the limit cycle was also examined to offer design guidance for its suppression. Additionally, the nonlinear vibration characteristics of the bogie, considering clearances between the guide wheel, stabilizing wheel, and track, revealed the presence of two limit cycles along with quasi-periodic and chaotic vibrations under boundary disturbances. Finally, it was shown that increasing yaw damping by increasing the longitudinal span of secondary lateral damper of bogie effectively suppresses self-excited vibrations and improves ride quality.

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单轨车辆的摆振力学与非线性振动特性

研究了带轮胎的单轨车辆的非线性振动特性。首先建立了单轨车辆转向架的三自由度动力学模型。数值模拟结果表明，该系统存在一个极限环，表现为转向架偏航时的摆振和横摇运动。推导了极限环的轨迹方程，分析了极限环的出现条件和系统平衡点。研究了转向架关键参数对极限环的影响，为抑制极限环提供设计指导。此外，考虑导向轮、稳定轮和轨道间隙的转向架非线性振动特性表明，在边界扰动下，转向架存在两个极限环以及准周期和混沌振动。最后，通过增大转向架副侧减振器的纵向跨度来增加横摆阻尼，可以有效地抑制车辆的自激振动，提高车辆的平顺性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sound and Vibration 工程技术-工程：机械

CiteScore

9.10

自引率

10.60%

发文量

551

审稿时长

69 days

期刊介绍： The Journal of Sound and Vibration (JSV) is an independent journal devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. There is an emphasis on fundamental work that has potential for practical application. JSV was founded and operates on the premise that the subject of sound and vibration requires a journal that publishes papers of a high technical standard across the various subdisciplines, thus facilitating awareness of techniques and discoveries in one area that may be applicable in others.