In maritime transportation systems, the stability and structural integrity of ship-mounted tanks subjected to sloshing phenomenon are critical due to economic considerations and to ensure ecological safety. During the voyage, the ships are subjected to external excitations, which induce sloshing in fluid in partially filled tanks mounted on the ship’s deck. This article investigates the effect of rotational axis configurations on the slosh dynamics of a 24,000 TEU water tank mounted on an Ever-Ace container ship. Sloshing phenomena caused by different combinations of piecewise sinusoidal rotational excitations have been compared. The fluid domain was simulated using ANSYS Fluent, coupled with transient structural analysis in ANSYS Mechanical, to analyze the structural integrity of the container. The fluid pressure loads were imported on the tank structure using a one-way FSI approach. The numerical results have been validated with the experimental data available in the literature. It has been found that the effects of viscous sub-layer are insignificant on the slosh dynamics of the tank. Moreover, the transient response of the air–water interface, impact pressure, and wall moment have been presented. Wave fluctuation is observed to be small when the axis of rotation is perpendicular to the free surface. Maximum impact pressure of 7 kPa has been observed for combination of roll and pitch motions. The range of amplitude of moment is maximum for combination of roll and pitch motions that varies from − 95.6 to 92.3 kN m. Furthermore, the frequency of the moment differed from the excitation frequency depending on the configuration of the rotational axis.

在海上运输系统中，出于经济考虑和确保生态安全，遭受晃动现象的船载储罐的稳定性和结构完整性至关重要。在航行过程中，船舶受到外部激励，导致安装在船舶甲板上的部分填充的储罐中的液体发生晃动。本文研究了旋转轴配置对安装在 Ever-Ace 集装箱船上的 24,000 TEU 水箱晃动动力学的影响。比较了由分段正弦旋转激励的不同组合引起的晃动现象。使用 ANSYS Fluent 模拟流体域，结合 ANSYS Mechanical 中的瞬态结构分析，分析容器的结构完整性。使用单向 FSI 方法将流体压力载荷导入罐结构。数值结果已通过文献中的实验数据得到验证。研究发现，粘性子层对储罐晃动动力学的影响并不显着。此外，还提出了空气-水界面、冲击压力和壁面力矩的瞬态响应。当旋转轴垂直于自由表面时，观察到波波动很小。对于滚动和俯仰运动的组合，观察到的最大冲击压力为 7 kPa。对于滚动和俯仰运动的组合，力矩幅度范围最大，范围为 - 95.6 至 92.3 kN·m。此外，根据旋转轴的配置，力矩的频率与激励频率不同。