ABSTRACT

A comprehensive experimental work is done to investigate sloshing dynamics in a partially liquid-filled baffled tank, equipped with a floating barge. An aspect ratio(h_s/l, liquid depth, h_s to length of tank, l) of 0.488 (above critical fill level), which corresponds to 75% fill level, is considered. The barge was subjected to regular wave excitations with a wave height of 0.1 m and frequencies ranging from 0.45Hz to 1.54Hz under beam sea condition. In addition, porous baffles are placed inside a rectangular tank to study its effectiveness in reducing the sloshing energy. Three different porosities of 15%, 20.2% and 25.2% at l/2 are considered. The effectiveness of baffles is explored and the salient results for a single porous baffle are discussed. It is learnt that the effect of baffles on sway and roll responses is significant, whereas it is insignificant on heave. Porous baffles are effective in suppressing the sloshing oscillation in the vicinity or at wave excitation, f_w=f₁, whereas the sloshing is amplified at f_w=f₂ and f_w=f₃ due to the resonance condition of modified natural frequencies.

摘要

完成了一项全面的实验工作，以研究配备有浮动驳船的部分充满液体的挡板罐中的晃动动力学。考虑了 0.488（高于临界填充水平）的纵横比（h _s / l，液体深度，h _s与罐的长度，l），这对应于 75% 的填充水平。在波束海况下，驳船受到波高为 0.1 m，频率范围为 0.45Hz 至 1.54Hz 的规则波激励。此外，多孔挡板被放置在一个矩形罐内，以研究其在减少晃动能量方面的有效性。l三种不同的孔隙率分别为 15%、20.2% 和 25.2%/2 被考虑。探讨了挡板的有效性，并讨论了单个多孔挡板的显着结果。据了解，挡板对摇摆和横摇响应的影响是显着的，而对垂荡的影响不显着。多孔挡板可有效抑制附近或在波激励下的晃荡振荡，f _w = f ₁，而晃荡在f _w = f ₂和f _w = f ₃处被放大，这是由于修正的固有频率的共振条件。