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A study on the coupling effect between sloshing and motion of FLNG with partially filled tanks

机译：部分装满水的FLNG晃荡与运动耦合效应研究

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This paper discusses the coupling influence of floating LNG (FLNG) motions with internal liquid sloshing. Model experiments were performed in an ocean model basin, and results were compared with numerical calculations. The FLNG model used in our study had six square tanks. To verify the liquid cargo effect, the FLNG model was tested under two conditions: a liquid cargo condition and a fixed solid-cargo condition. As for filling level, there were three loading conditions (15%, 50%, and 90% filled). Our numerical scheme solves internal liquid sloshing using a three-dimensional finite difference method, and ship motion by potential theory. The sloshing effect was computed by the time-domain coupled simulation. We obtained good agreement between experimental and numerical results even at the near-natural frequency of sloshing. In both experimental results and numerical simulations, the effect of internal liquid is significant for sway and roll motion. Furthermore, the internal free surface motions obtained by the experiments and numerical simulations showed similar non-linear free surface behavior in the case of low filling.
机译：本文讨论了浮动LNG（FLNG）运动与内部液体晃荡的耦合影响。在海洋模型盆地中进行了模型实验，并将结果与​​数值计算进行了比较。我们研究中使用的FLNG模型有六个方形坦克。为了验证液体货物的影响，在两个条件下测试了FLNG模型：液体货物条件和固定固体货物条件。至于填充水平，存在三种加载条件（填充为15％，50％和90％）。我们的数值方案使用三维有限差分法解决了内部液体晃动，并通过势能理论解决了船舶运动。通过时域耦合仿真计算晃荡效果。即使在近乎自然的晃动频率下，我们也获得了实验和数值结果之间的良好一致性。在实验结果和数值模拟中，内部液体的影响对于摇摆和横摇运动都很重要。此外，通过实验和数值模拟获得的内部自由表面运动在低填充情况下显示出相似的非线性自由表面行为。

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