跨声速颤振计算方法研究  

Study of calculation method for transonic flutter

作　　者：王军利[1] 周洲[1] 

机构地区：[1]西北工业大学无人机特种技术国防科技重点实验室,陕西西安710065

出　　处：《飞行力学》2010年第2期39-41,50,共4页Flight Dynamics

摘　　要：采用改进的弹簧近似方法,以ALE(Arbitrary Lagrangian-Eulerian)描述的Euler方程为控制方程,耦合结构运动方程,计算了Isogai机翼模型的颤振边界。气动力求解采用双时间推进,外时间为物理时间,与结构运动方程同步;结构运动方程求解采用Rayleigh-Ritz方法,时间推进也采用双时间法,节省了大量计算时间。研究表明,计算结果与参考文献提供的结果吻合良好,证明了所提出的跨声速颤振计算方法的准确性。Applications of the improved spring analogy method, ALE Euler solver, coupled with the structural motion equations are applied to calculate a flutter boundary of the Isogai wing model. A dual-time stepping method is applied to the Euler equations to calculate the aerodynamic forces, in which the physical time step is synchronous with the structural equations of motion. The Rayleigh-Ritz method is used to calculate structure equations with a dual time-stepping method. The computation cost greatly reduced. Computational results are in good agreement with those of other literatures. This approves the analysis method＇ s accuracy of transonic flutter characteristics developed in this paper.

关 键 词：改进弹簧近似方法 EULER方程 双时间推进法 颤振 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]