Abstract

A numerical analysis for fluid-membrane interaction is conducted to investigate fluid slosh within a partially filled horizontal cylindrical tank with an elastic membrane restraining the free surface. The fluid-membrane interaction analysis is performed to investigate the effect of membrane on liquid slosh responses in terms of liquid load shifts, slosh forces, moments and slosh frequency. A series of experiments were conducted on a scaled horizontal cylindrical tank with an elastic membrane-like restraint under harmonic acceleration excitations in longitudinal or lateral direction. The validity of the numerical model is demonstrated using the laboratory-measured data. The validated model is subsequently formulated for a full scale tank and analysis are performed under excitations idealizing the straight-line braking or turning maneuvers to investigate the antislosh effectiveness of membrane. It is shown that the addition of membrane can yield substantial reduction in slosh amplitude and thus the pitch and roll moment; the slosh frequency can be substantially shifted to higher values to avoid resonance in partly filled tanks.

摘要

进行了液-膜相互作用的数值分析，以研究带有弹性膜限制自由表面的部分填充水平圆柱罐内的流体晃荡。进行了液-膜相互作用分析，以从液体负荷变化，晃荡力，力矩和晃荡频率方面研究膜对晃荡响应的影响。在具有纵向或横向谐波加速度激励的具有弹性膜状约束装置的水平卧式圆柱罐上进行了一系列实验。使用实验室测量的数据证明了数值模型的有效性。随后将经过验证的模型用于全尺寸水箱，并在激励作用下进行分析，以使直线制动或转向操作理想化，以研究膜的防晃动效果。结果表明，添加膜可以大大降低晃动幅度，从而减小俯仰和侧倾力矩。晃动频率可以基本上移到更高的值，以避免在部分装满的水箱中产生共振。