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

对流体-膜相互作用进行了数值分析，以研究部分填充的水平圆柱形水箱内的流体晃动，其中弹性膜限制了自由表面。执行流体-膜相互作用分析以研究膜对液体载荷变化、晃动力、力矩和晃动频率等液体晃动响应的影响。在纵向或横向谐波加速度激励下，在具有弹性膜状约束的缩放水平圆柱罐上进行了一系列实验。使用实验室测量数据证明了数值模型的有效性。随后针对全尺寸水箱制定经过验证的模型，并在理想化直线制动或转弯机动的激励下进行分析，以研究膜的防晃动效果。结果表明，添加膜可以显着降低晃动幅度，从而降低俯仰和横滚力矩；晃动频率可以显着转移到更高的值，以避免在部分填充的水箱中产生共振。