Numerical Research on FPSOs With Green Water Occurrence
Numerical Research on FPSOs With Green Water Occurrence
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DOI：
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发表时间：
2009-03
影响因子：
1.4
通讯作者：
R. Zhu;G. Miao;Z. Lin
中科院分区：
文献类型：
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作者：
R. Zhu;G. Miao;Z. Lin
帆船或浮式结构物上的绿水荷载发生在到来的海浪远远超过干舷，水流到甲板上时。本文利用基于商业软件FLUENT平台开发的数值程序，对浮式结构物在波浪作用下发生的绿水现象进行了数值模拟。对固定式浮式生产储油装置(FPSO)模型和船舶在迎浪中的振荡现象进行了数值模拟和分析。对于振荡浮体的情况，提出了一种组合的思想，即用位势理论预先计算浮式生产储油船的运动，并利用计算流体动力学(CFD)工具来研究绿水的细节。在数值波浪水池中引入了一种动态网格技术来模拟波浪中振动容器上的绿水现象。数值计算结果与Greco(2001)的二维固定FPSO模型和Buchner(2002)的三维振动船的相应试验结果吻合较好。研究表明，本文提出的数值格式和方法可用于实际模拟甲板上的绿水现象，预测和分析绿水对浮式结构物的冲击力。这对进一步指导船舶设计和优化，特别是对船头的强度设计具有重要意义。
Green water loads on sailing ships or floating structures occur when an incoming wave significantly exceeds freeboard and water runs onto the deck. In this paper, numerical programs developed based on the platform of the commercial software Fluent were used to numerically model green water occurrence on floating structures exposed to waves. The phenomena of the fixed floating production, storage, and offloading unit (FPSO) model and oscillating vessels in head waves have been simulated and analyzed. For the oscillating floating body case, a combination idea is presented in which the motions of the FPSO are calculated by the potential theory in advance and computional fluid dynamics (CFD) tools are used to investigate the details of green water. A technique of dynamic mesh is introduced in a numerical wave tank to simulate the green water occurrence on the oscillating vessels in waves. Numerical results agree well with the corresponding experimental results regarding the wave heights on deck and green water impact loads; the two-dimensional fixed FPSO model case conducted by Greco (2001), and the three-dimensional oscillating vessel cases by Buchner (2002), respectively. The research presented here indicates that the present numerical scheme and method can be used to actually simulate the phenomenon of green water on deck, and to predict and analyze the impact forces on floating structures due to green water. This can be of great significance in further guiding ship design and optimization, especially in the strength design of ship bows.