摘要
通过数值仿真和实验,研究了非线性汽车悬架的混沌特性.建立了路面双频拟周期激励作用下的单自由度汽车悬架模型,通过数值仿真,给出了悬架振动的时间历程曲线、自功率谱密度图形和Poincare截面,从理论上说明汽车悬架振动是混沌的.进行振动实验,获取实验汽车悬架的振动数据,对其计算了一阶固有频率和混沌参数如关联维、Kolmogorov熵和最大Lyapunov指数,从而验证了汽车悬架振动的混沌特征.为汽车悬架的优化设计和建立悬架隔振性能混沌评价新方法提供了理论依据.
The chaotic characteristics of nonlinear automobile suspension were researched by numerical simulation and experiment.The single degree of freedom automobile suspension model,which was subjected to the road random excitation,was built.The time history curve,self-power spectral density figure and Poincare map were given by numerical simulation.It is confirmed that the vibration of automobile suspension is chaotic.The vibration curves of the automobile suspension are obtained by experiment.The first order nature frequency and the chaos characteristics parameters such as correlation dimension,Kolmogorov entropy and maximum Lyapunov exponent are calculated.The chaotic characteristics of automobile suspension vibration are verified.The basis for optimization design of automobile suspension and the establishment of a newsuspension vibration isolation performance chaotic evaluation method is provided.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2010年第2期99-101,共3页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
江苏省"六大人才高峰"项目(07-D-014)
南京工程学院重大科研项目(KXJ07066)
关键词
悬架
混沌
仿真
实验
suspension
chaos
simulation
experiment
