| Pressure-induced instability and its coupled aeroelasticity of inflated pillow |
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| 作者姓名： | Ji ZHANG Changguo WANG Jiaming GUO Jiawei ZHANG |
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| 作者单位： | National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150080,China;Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150001,China |
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| 基金项目： | the financial support from the National Natural Science Foundation of China (11872160)； |
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| 摘 要： | A floating air weapon system(such as airborne floating mines) plays an important role in modern air defense operations. This paper focuses on aeroelastic characteristics of airborne floating mine named inflated pillow. Firstly, the dynamic deployable process of the pillow and characteristics of the local instability of the edge are studied, and the evolution mechanism of wrinkles and kinks is analyzed. Secondly, in the cruising stage, the fluid-structural-thermal coupling analysis is performed o...
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| 收稿时间： | 21 October 2020 |
Pressure-induced instability and its coupled aeroelasticity of inflated pillow |
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| Ji ZHANG,Changguo WANG,Jiaming GUO,Jiawei ZHANG.Pressure-induced instability and its coupled aeroelasticity of inflated pillow[J].Chinese Journal of Aeronautics,2022,35(2):1-7. |
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| Authors: | Ji ZHANG Changguo WANG Jiaming GUO Jiawei ZHANG |
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| Institution: | 1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China;2. Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | A floating air weapon system (such as airborne floating mines) plays an important role in modern air defense operations.This paper focuses on aeroelastic characteristics of airborne floating mine named inflated pillow.Firstly,the dynamic deployable process of the pillow and characteris-tics of the local instability of the edge are studied,and the evolution mechanism of wrinkles and kinks is analyzed.Secondly,in the cruising stage,the fluid-structural-thermal coupling analysis is performed on the pillow,and the aeroelastic characteristics are studied.Thirdly,the shape-preserving effect of the inflated pillow during the "negative pressure" slow landing stage is evalu-ated.It is found that when the wind velocity is higher,the pillow has a collapsed instability (surface extrusion and contact),and when the wind velocity is lower,snap-through instability occurs.Finally,for the collapsed instability,a carbon fiber skeleton is added to discrete the large global collapsed fold into small local folds,thus achieving shape-preserving effect of pillow.For snap-through instability,the critical internal pressure and different shape evolution under different wind velocity are evaluated.Through the analysis of the mechanical mechanism and control of the struc-tural morphological evolution,it provides theoretical guidance for the application of the curved shell structure in floating air weapon system. |
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| Keywords: | Aeroelastic analysis Fluid-structural-thermal coupling analysis Inflated pillow Kink Pressure-induced instability Wrinkle |
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