The effect of in-plane stresses on the stability behaviors of constant stiffness and variable stiffness composite panels, exposed to aerodynamic pressure, is studied using the finite element method. The dynamic pressure from the high velocity airflow is evaluated from the first-order piston theory, and the eigenvalue analysis is performed to investigate the flutter or divergence type of instabilities in such composite panels under combined mechanical and aerodynamic loads. Attempt is made to understand the effect of the lamination parameter on the stability characteristics of edge-supported and cantilever composite trapezoidal panels. Finally, the limit cycle oscillation of variable stiffness plates subjected to aerodynamic pressure is investigated.

中文翻译：

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预应力变刚度复合板的空气弹性分析

使用有限元方法研究了平面应力对承受空气压力的恒定刚度和可变刚度复合板的稳定性的影响。从一阶活塞理论评估了高速气流的动压，并进行了特征值分析以研究这种复合面板在机械和空气动力组合作用下的颤振或发散类型的不稳定性。试图了解层压参数对边缘支撑和悬臂复合梯形板稳定性特性的影响。最后，研究了空气动力学压力作用下的变刚度板的极限循环振荡。