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具有自由液体表面的贮箱装置在部分装载情况下,箱内液体的晃荡会引起冲击荷载,严重时将导致箱壁结构破坏。航天领域,航天器的液体推进剂作为低频震源,其一阶晃荡频率若与控制系统发生耦合,将引起系统不稳定,影响飞行姿态,甚至导致飞行失败,如美国斯维尼亚公司的雷神号等[2]。本文通过对晃荡问题研究,提出一种新型航天贮箱——囊式载液贮箱,对其进行了模拟晃荡实验。相同激励下,新型贮箱的冲击荷载远小于带有防晃版的传统矩形贮箱,且其具有质量小,解决焊接难题等优点,更适宜承载航天飞行器推进剂。
Tanks with a free liquid surface may, under partial loading conditions, cause sloshing of the liquid in the tank and, in severe cases, destruction of the tank wall structure. Aerospace, spacecraft liquid propellants as a low-frequency source, the first-order sloshing frequency coupled with the control system will cause system instability, affect the flight attitude, and even lead to flight failures, such as the United States of America Svenia’s Thunder and so on [2]. Based on the research of sloshing problem, this paper presents a new aerospace tank-capsule carrier liquid tank, and simulates the sloshing experiment. Under the same excitation, the impact load of the new tank is much smaller than that of the traditional rectangular tank with the anti-rolling version, and it has the advantages of small mass, solving the welding problem and the like, and is more suitable for carrying aerospace propellant.