多频激励下滞后非线性车辆悬架系统的动力特性分析

Vibration Analysis on Vehicle Suspension System with Hysteretic Nonlinearity Characteristic under Multi-frequency Excitation

基于顺行平面Hamilton系统周期-能量关系及KAM理论证明的前期研究基础,通过对滞后非线性车辆悬架系统在多频激励下的受扰振动做进一步数值模拟,给出系统安全拟周期状态及等幅多频激励混沌状态的新参数验证;增加了不等幅多频激励混沌状态的数值模拟结果,界定了不等幅多频激励下滞后非线性车辆悬架系统的动力特性。

Based on the theory prove and the forced vibration characteristic analysis of a single degree for freedom 1/4 hysteretic nonlinearity vehicle suspension systim under multi-frequency excitation before, more improved numerical simulations and examples were given to testify the period-energy relationship of direct two-dimensional Hamilton system and KAM theory. The new coefficient validation and theoretical analysis foreigen period of forced kintic system are discussed. The numerical simulation of chaos state under unequal amplitude multi-frequency excitation is added to illuminate the vibrate characteristics of hysteretic vehicle suspension system. The results may supply theoretical bases for parameter recognition of the analysis and optimal design of stabilized rgion for vehicle suspension systems.