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针对汽车通过路面铺设的连续减速带产生的剧烈振动为研究背景,建立了连续减速带-非线性4自由度车辆悬架力学模型,分析了悬架模型受到连续减速带激励时的非线性动力学行为,运用相位图、Poincaré(庞加莱截面)图和PSP(周期采样峰-峰值)图研究了系统非线性振动特性,进而揭示了减速带参数与系统拟周期产生条件的关系.结论表明:在连续减速带的路面激励下,非线性车辆会发生复杂的非线性振动,当系统发生拟周期振动时,车辆会发生剧烈振动,这种振动可以通过合理的减速带参数设置得以有效避免.
In view of the violent vibration produced by the continuous deceleration belt paved by the road, a continuous deceleration zone-nonlinear 4-DOF vehicle suspension mechanical model is established, and the nonlinear dynamics of the suspension model subjected to the continuous deceleration zone is analyzed. Behavior, phase diagram, Poincaré plot and PSP (periodic sampling peak-peak) graph are used to study the nonlinear vibration characteristics of the system, and then the relationship between the parameters of the deceleration band and the quasi-periodic system generation conditions is revealed. In the continuous deceleration zone of the road surface excitation, nonlinear vehicles will occur complex nonlinear vibration, when the system occurs quasi-periodic vibration, the vehicle will occur violent vibration, this vibration can be set through a reasonable deceleration zone parameters can be effectively avoided.