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针对液体晃动重心变化对航空航天器、载液货船等载液系统运动及姿态稳定性的影响,结合某型飞机副油箱的晃振试验,采用光滑粒子流体动力学(SPH)方法对该油箱进行了5个晃动周期的数值模拟。推导了任意时刻液体晃动重心的计算表达式,获得了晃动过程中的液体重心变化时间历程曲线,体现了周期性激励作用下液体晃动轨迹的周期性。
Aiming at the influence of the center of gravity of liquid sloshing on the movement and attitude stability of carrier systems such as spacecraft and carrier, combined with the aeroelastic vibration test of a certain type of aircraft fuel tank, the method of smooth particle hydrodynamics (SPH) Numerical simulation of 5 shaking cycles. The calculation expression of the center of gravity of liquid slides at any moment is deduced, and the curve of liquid center of gravity during the sloshing process is obtained, which shows the periodicity of liquid sloshing trajectory under periodic excitation.