路面激励下车辆悬架滞回模型的混沌研究  

Chaotic behavior of hysteretic suspension model excited by road surface profile

作　　者：吴参[1,2,3] 王维锐[4] 徐博侯[5] 李兴林[3] 江伟光[6] 

机构地区：[1]浙江大学工业设计所,浙江杭州310027 [2]杭州电子科技大学机械工程学院,浙江杭州310018 [3]杭州轴承试验研究中心有限公司,浙江杭州310022 [4]浙江大学机械设计所,浙江杭州310027 [5]浙江大学航空航天学院,浙江杭州310027 [6]浙江工业大学机械工程学院,浙江杭州310014

出　　处：《浙江大学学报（工学版）》2011年第7期1259-1264,1287,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51005206);浙江省自然科学基金资助项目(Y1111044);杭州电子科技大学科研基金资助项目(KYF015610027);启动基金资助项目(KYS015611017)

摘　　要：为了分析车辆悬架在实际路面激励下的振动状态,根据试验所得的磁流变减振器示功曲线,采用Matlab软件拟合修正的Bouc-Wen模型,建立带滞回特性的非线性模型以及基于减振器试验数据的两自由度四分之一悬架模型.研究该半主动悬架的频率响应特性,通过相平面图、Poincaré截面图和分叉图分析半主动悬架在不同路面激励下的振动形式,研究随着路面变化或者悬架自身参数变化引起的振动形式的改变,揭示悬架系统在各种工况下发生的混沌行为,为地面车辆的动力学设计提供依据.The indicator diagram of magneto-rheological fluid damper was collected from experiments in order to analyze the vibration status of vehicle suspension under practical road profile.Then a modified Bouc-Wen model,which was a nonlinear model with hysteretic loop,was conducted by Matlab according to the experimental data.The model of semi-test two degree of freedom a quarter suspension was established.The frequency response characteristics of the model were analyzed,and the nonlinear characteristics were indicated in amplitude-frequency characteristic curves.The vibration form under different road excitation was judged by phase portrait,Poincaré diagram and bifurcate diagram,and the transfer of vibration form was influenced by either pavement excitation,or damping and stiffness of suspension.Results indicate the chaotic behavior under variable situations and provide the basis for the dynamic design of ground vehicle.

关 键 词：悬架非线性 Bouc-Wen 稳定性 POINCARÉ 分叉 

分 类 号：O328[理学—一般力学与力学基础] U461.4[理学—力学]