The Numerical Modeling of Coupled Motions of a Moored Floating Body in Waves

The Numerical Modeling of Coupled Motions of a Moored Floating Body in Waves
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波浪中系泊浮体耦合运动的数值模拟

DOI:
10.3390/w10121748
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发表时间:
2018-11
期刊:
影响因子:
3.4
通讯作者:
Linpengzhi
Linpengzhi
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Chenglin;Linpengzhi

文献摘要

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采用虚边界力(VBF)方法研究了波浪与系泊浮体的非线性相互作用。本文首先介绍了用VBF方法模拟波浪-浮体相互作用的室内三维粘性不可压缩流动模型(NEWTANK)。然后描述了系泊模型和浮体模型之间的耦合过程。文中给出了模型的验证算例,包括自由漂浮箱在两种不同水波中的运动。本文的数值结果将与现有的实验数据和已发表的文献中的其他数值结果进行比较。然后,通过模拟浮箱在静水中的运动,对数值模型中系缆的有效性进行了仿真。最后,将该模型应用于悬链式系泊浮式结构物的波浪诱导运动分析,研究了悬链式系泊浮式结构物的运动响应和系泊力响应。数值计算结果与实验测量结果基本吻合。这表明本数值模型能够正确地反映波浪系泊浮式结构物相互作用的主要特征。
Nonlinear interactions between water waves and a moored floating body are investigated using the virtual boundary force (VBF) method. The paper first introduces an in-house three-dimensional viscous incompressible flow model (NEWTANK), which is used to simulate wave-floating structure interaction by using the VBF method. Then the coupling procedure between the mooring line model and the floater model is described. Some validation cases of the developed model, including the motions of a free-floating box in two different water waves, are presented. The present numerical results will be compared with the available experimental data and other numerical results from the published literature. After that, the validity of the mooring line in the numerical model is simulated by simulating the motions of a floating box in still water. Finally, the verified model is applied to analyze the wave-induced motions of a catenary moored floating structure, investigating the motion responses and mooring forces responses. The numerical results agree well with the experimental measurements on the whole. This indicates that the present numerical model can correctly capture the main features of the wave-moored floating structure interaction.
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