动不平衡激励下光滑非线性车辆摆振系统建模分析

胡辰;卢剑伟;许生

振动与冲击 ›› 2013, Vol. 32 ›› Issue (20) : 86-89.

PDF(1631 KB)
PDF(1631 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (20) : 86-89.
论文

动不平衡激励下光滑非线性车辆摆振系统建模分析

  • 胡辰,卢剑伟,许生
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Dynamic Response Analysis of Vehicle Smooth Nonlinear Shimmy System with External Excitation

  • Hu Chen; Lu Jianwei; Xu Sheng
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摘要

考虑前轮动不平衡为外激励,建立了车轮外激励作用下的三自由度车辆摆振系统动力学模型。应用数值分析方法,通过分岔特性等分析,讨论了考虑动不平衡激励的车辆摆振系统动力学响应,并对车辆摆振响应中的频率成分及其特征进行了系统的分析讨论。结果表明:动不平衡激励下的摆振形态和自激振动下的摆振形态有较大差别,随着动不平衡激励的增加,摆振会由系统自身结构引起的自激振动成分占主导逐步转变为由外激励引起的强迫振动占主导,摆振系统在摆振车速区间内由拟周期运动逐步变为单周期运动。相关理论可为转向系摆振的有效控制提供理论依据。

Abstract

A 3-DOF dynamic model of vehicle shimmy was established. In this model, the external excitation of dynamic unbalance of front wheel was considered. Based on bifurcation analysis, the dynamic response of vehicle shimmy system with the excitation of dynamic unbalance was analyzed, and the characteristics of frequency components of the vibration response were systematically analyzed. The results show that the characteristics of shimmy with the external excitation of dynamic unbalance is quite different from self-excited vibration, so it should be considered in the modeling process of shimmy system. With increment of the excitation of dynamic unbalance, the vibration experiences the variations from domination of self-excited vibration, which is caused by system structure itself, to forced vibration, which is caused by external excitation. As a result, the system experiences the variations from quasi-periodic motion to periodic motion under certain vehicle speed range. The correlative conclusions can provide theoretical basis for effective control of the steering wheel shimmy.

关键词

动不平衡 / 外激励 / 摆振 / 强迫振动 / 转向系

Key words

Dynamic unbalance / External excitation / Shimmy / Forced vibration / Steering system

引用本文

导出引用
胡辰;卢剑伟;许生. 动不平衡激励下光滑非线性车辆摆振系统建模分析 [J]. 振动与冲击, 2013, 32(20): 86-89
Hu Chen;Lu Jianwei;Xu Sheng. Dynamic Response Analysis of Vehicle Smooth Nonlinear Shimmy System with External Excitation[J]. Journal of Vibration and Shock, 2013, 32(20): 86-89

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