跨声速颤振计算方法研究

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。

Study of calculation method for transonic flutter

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.Computati...