Abstract:A storage tank is an important part of a spacecraft.As far as its structure is concerned, its basic characteristics are light weight, high rigidity and strength requirements.The tank is filled with a large amount of liquid, and also needs to undergo a complicated mechanical environment.Therefore, the fluid-structure coupling dynamics problem of thin-walled tanks has always been one of the key issues for spacecrafts.Aiming at the fluid-structure coupling problem of thin-walled tanks, an elastic liquid-filled tank model was established, and the two-way fluid-structure coupling method was used to analyze the transient response of liquid-filled tanks considering fluid-structure coupling effects, and to obtain liquid sloshing wave height and time history of tank structure stress.By changing the material and thickness of the storage tank and the liquid-filling ratio, the effects of the flexibility of the tank on the sloshing of the liquid and the mechanical characteristics of the structure were studied.The results show that: by appropriately increasing the flexibility of the box material, that is, by reducing the Young's modulus, density, and thickness of the material, the liquid in the tank can be effectively suppressed; Increasing the thickness of the box or reducing the Young's modulus and density of the material will reduce the stress on the box.By changing the filling ratio, it can be found that as the liquid-filling ratio increases, the amplitude of liquid shaking decreases, and the stress on the tank increases.
杨鹏飞1,2,陈刚1,薛杰3,王珺3. 航天器弹性充液贮箱双向流固耦合响应特性数值分析[J]. 振动与冲击, 2021, 40(12): 283-289.
YANG Pengfei1,2, CHEN Gang1, XUE Jie3, WANG Jun3. Numerical simulations on response characteristics of a spacecraft elastic liquid-filled tank by a fluid-structure coupling method. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(12): 283-289.
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