Abstract Sloshing inside liquid containers may result in carrier instability or structural damage of the tank. To suppress the liquid sloshing in a swaying and rolling rectangular tank, a bottom-hinged and top-tensioned vertical porous membrane baffle at the center of the tank was employed and its performance as an anti-sloshing device was investigated. As a hydroelastic theoretical-analysis tool, a matched eigenfunction expansion method (MEEM) with Green function and empirically-tuned Darcy's model for the sloshing interaction with the vertical porous membrane is developed. The representative numerical results were validated through comparisons with two separate experimental results. Then, the numerical tool was repeatedly used for extensive parametric investigations to qualitatively determine optimal design parameters. Free-surface elevations at tank wall, hydrodynamic forces (added mass and damping coefficient) on the tank, responses of membrane, and wave loads on the porous membrane baffle are systematically analyzed with varying key design parameters. It is shown that the tensioned porous membrane baffle can be an effective, temporary anti-sloshing measure when needed. The developed computer program can repeatedly be used to find the optimal design parameters during the initial design stage.

中文翻译：

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底部铰接、顶部张拉多孔膜挡板对矩形储罐内晃荡减少的影响

摘要 液体容器内的晃动可能导致载体不稳定或罐体结构损坏。为了抑制摇摆和滚动的矩形储罐中的液体晃动，在储罐中心采用底部铰接顶部张拉的垂直多孔膜挡板，并对其作为防晃装置的性能进行了研究。作为水弹性理论分析工具，开发了具有格林函数和经验调整的达西模型的匹配特征函数展开方法 (MEEM)，用于与垂直多孔膜的晃动相互作用。通过与两个单独的实验结果进行比较，验证了具有代表性的数值结果。然后，反复使用数值工具进行广泛的参数研究，以定性地确定最佳设计参数。使用不同的关键设计参数系统地分析了罐壁的自由表面高程、罐上的水动力（附加质量和阻尼系数）、膜的响应和多孔膜挡板上的波浪载荷。结果表明，张紧的多孔膜挡板在需要时是一种有效的临时防晃措施。开发的计算机程序可以在初始设计阶段重复使用以找到最佳设计参数。