Abstract:
Considering the different objectives and demand at each of the aircraft design stages, three analysis methods are developed for panel flutter. The first one is the engineering estimation method, which can quickly predict the flutter stability and is suitable for fast iteration of structural design. The second one is the method based on piston theory, which considers the influence of structural nonlinearity and can give the flutter response. It can be used for primary analysis of panel flutter, structural fatigue life assessment and design optimization. The third one is the method based on CFD (computational fluid dynamics), which can realize the natural–like simulation and has a higher prediction accuracy. It can be used for check analysis of designed panel structure. Their algorithm theories, implementation procedures and application features are introduced. Based on that, an integrated engineering analysis process is established. Finally, two typical panel cases are studied for method validation and comparative analysis.