斜 掠 气 梁 充 气 翼 湿 模 态 分 析 与 试 验

Based on the idea of aeroelastic tailoring，a new type of inflatable wings with swept air-beams is designed by deflecting the air beam inside the inflatable wing along the spanwise direction. The wet mode concerning the influence of ambient air is necessary for the research on the dynamic characteristics of inflatable wings，and a method named added mass-stiffness method considering the added mass and stiffness contribution of air is proposed to rapidly model and precisely analyze the wet mode of flexible inflatable structures. The proposed method is verified by an inflatable tube example，and applied to the traditional baffled inflatable wings and the new type with swept air-beams. The comparison between the simulation and Ground Vibration Test（GVT）results shows that the simulation results of three inflatable wings are in good agreement with the test results. The natural frequencies of the inflatable wings are on the rise with the increasing internal pressure，and for the new type of inflatable wings with swept air-beams，the natural frequency ratio of Mode 1 and Mode 2 is lower than that of the traditional baffled type，while the chordwise bending mode is also eliminated，which is valuable for improving the aeroelasticity of inflatable wings.