非线性车辆在连续减速带激励下的混沌振动
首发时间:2012-06-27
摘要:针对车辆通过连续减速带时将可能引起的混沌振动现象,构建具有恒定振幅和可变频率的正弦-梯形波耦合的减速带激励模型。采用2自由度1/4车辆模型,研究连续减速带引起的悬架系统的非线性振动。通过分叉图、相位图、poincaré截面图和功率谱图分析了混沌振动产生的条件,并得出了导致车辆模型发生混沌振动时激励频率的精确范围。
关键词: 耦合激励 混沌振动 悬架系统 连续减速带 数值仿真
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THE CHAOTIC VIBRATION OF A NONLINEAR VEHICLE MODEL UNDER THE CONSECUTIVE SPEED HUMPS
Abstract:The study is aimed at analyzing the chaotic vibration of a vehicle passing the consecutive speed control humps(SCHs). The SCHs excitation function were presented by the combined sine-trapezoidal wave of constant amplitude and variable frequency. A two-DOF quarter vehicle model with nonlinear spring and damper is applied. Occurrence of chaotic vibration is analyzed by bifurcation diagram, time history, poincaré map and power spectrum. Furthermore, the exact range of excitation frequency that results in chaotic vibration is derived.
Keywords: combined excitaion chaotic vibration vehicle suspension consecutive speed-conrtrol humps numerical simulation
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