考虑结构初变形的二维壁板颤振分析

Structural failure is often found in skin panels of high-speed vehicles due to aeroelastic flutter. The flutter analysis is essential to damaged panels for better structural design and for avoiding the flight failure. In this paper, the initial structural deflection due to damage is considered, the flutter analysis is performed for a two-dimensional panel. The analytical flutter boundary solutions are obtained using the second order harmonic mode model. With a thorough analysis for aerothermoelastic deformation and flutter, the conclusions are reached that the aerothermoelastic deformation of the panel is sensitive to the initial deflection, and the critical flutter dynamic pressure increases with the increase of the initial deflection amplitude.