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A 3D fully coupled analysis of nonlinear sloshing and ship motion

机译：非线性晃荡与船舶运动的3D全耦合分析

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This study investigates the coupling effects of six degrees of freedom in ship motion with fluid oscillation inside a three-dimensional rectangular container using a novel time domain simulation scheme. During the time marching, the tank-sloshing algorithm is coupled with the vessel-motion algorithm so that the influence of tank sloshing on vessel motions and vice versa can be assessed. Several factors influencing the dynamic behavior of tank-liquid system due to moving ship are also investigated. These factors include container parameters, environmental settings such as the significant wave height, current velocity as well as the direction of wind, wave and flow current acting on the ship. The nonlinear sloshing is studied using a finite element model whereas nonlinear ship motion is simulated using a hybrid marine control system. Computed roll response is compared with the existing results, showing fair agreement. Although the two hull forms and the sea states are not identical, the numerical result shows the same trend of the roll motion when the anti-rolling tanks are considered. Thus, the numerical approach presented in this paper is expected to be very useful and realistic in evaluating the coupling effects of nonlinear sloshing and 6-DOF ship motion.
机译：这项研究使用新颖的时域仿真方案研究了六自由度的船舶运动与三维矩形容器内部流体振荡的耦合效应。在时间行进期间，坦克晃荡算法与船只运动算法结合使用，因此可以评估坦克晃荡对船只运动的影响，反之亦然。还研究了影响船舶移动的液罐系统动态行为的几个因素。这些因素包括集装箱参数，环境设置（例如重要的波高，当前速度以及作用在船上的风向，波浪和水流的方向）。使用有限元模型研究非线性晃荡，而使用混合海洋控制系统模拟非线性船舶运动。将计算的滚动响应与现有结果进行比较，显示出合理的一致性。尽管两种船体形式和海况并不相同，但当考虑使用防倾舱时，数值结果显示出相同的侧倾运动趋势。因此，本文提出的数值方法有望在评估非线性晃荡和6自由度船舶运动的耦合效应方面非常有用和现实。

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