摘要
以非定常纳维尔 -斯托克斯方程为主管方程 ,计算翼型振荡的瞬态非定常气动力 ,并与带有结构刚度非线性的颤振方程耦合求解 ,用时间推进的方法 ,计算了带有结构刚度非线性的结构响应特性 ,及带有三次型刚度和间隙型刚度非线性的跨音速翼型颤振特性。计算研究表明 ,由于同时具有结构和气动非线性 ,导致了振荡极限环极为复杂的特性。
An analytic method of an airfoil flutter system with nonlinear stiffness in transonic air flow is presented.Unsteady aerodynamic forces are governed by Navier Stokes equations.The time histories of the structure responses of the airfoil are solved by coupling with the Navier Stokes equations and flutter equations.The nonlinear stiffness including gap and cubic type stiffness is investigated.Because there are both structural and aerodynamic nonlinear items in the flutter system,the dynamic behewior of the system is very complicated.
出处
《振动工程学报》
EI
CSCD
北大核心
2001年第3期319-321,共3页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目 (编号 :196 82 0 0 4
19972 0 5 7)
