具有不对称间隙的二元机翼自激振动的混沌分析  

A chaos analysis of a two-dimensional airfoil with asymmetry freeplay

作　　者：任爱娣[1] 张良欣[1] 张琪昌[2] 

机构地区：[1]海军工程大学后勤指挥与工程系,天津300450 [2]天津大学机械学院,天津300072

出　　处：《空气动力学学报》2009年第1期88-92,共5页Acta Aerodynamica Sinica

基　　金：国家自然科学基金资助项目(10372068)

摘　　要：利用数值方法分析了无预荷载情况下具有不对称间隙的气动弹性非线性与结构非线性耦合的二元机翼颤振问题的动力学响应。通过研究速度比U*/UL*从零逐渐增大到1时系统的全局演化规律,发现在无预荷载的不对称分段线性系统中存在混沌运动形式,并对其进行具体分析,得到产生混沌的原因,为进一步控制和减小颤振提供理论帮助,对飞机的飞行结构设计及飞机结构的日常维护具有指导意义。The dynamics response of a two-dimensional airfoil without preload asymmetry freeplay, which is suffered from the coupled forces of aeroelastie nonlinear and structural nonlinear, is analyzed by means of numerical method. Global bifurcation of the system is studied as the speed ratio U^＊/UL^＊ increases from zero to 1 gradually. The chaos motion is found in the system. The reason for the chaos is gained by analyzing it concretely which gives the theoretical help for further controlling and reducing the flutter and instructive to the design of aircraft structures and regular maintenance of plane.

关 键 词：不对称间隙 二元机翼 气动弹性 混沌 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]