中文摘要：

甲板上浪是危害海洋浮式结构物的重要因素。文章采用模型试验方法对一艘FPSO的甲板上浪现象进行了考察。结合模型试验的结果,采用大规模并行计算技术成功再现了甲板上浪这一非线性极强的物理现象,有效地克服了计算时间的限制。数值模拟中对与上浪密切相关的物理参数如水体流动,船体的运动,冲击载荷进行了记录。为了保证数值模拟的精确性,文中开展了网格试验和时间步长试验,得到了适合甲板上浪模拟的网格划分方案和时间步长。由数值模拟得到的上浪细节相当详尽,如由VOF方法进行液面捕捉得到的波浪沿船艏爬升、变形、最后冲击船艏结构物破碎的过程与试验相比很为接近。计算实践表明采用大规模并行计算是解决上浪等非线性问题的可靠的、高效的途径。

英文摘要：

Green water is an important factor threatening the safety of offshore floating structures.In this paper,experimental study is conducted to investigate the green water phenomenon on a FPSO.Combined with experimental results,the large-scale parallel computation technique to reproduce the highly non-linear green water phenomenon is adopted.Through this way,the bottleneck posed by computational time is efficiently overcome.In the numerical simulation,parameters closely related to green water such as water behavior on deck,motion of the ship,impacting load,are recorded.Grid test and time step test are carried out to make sure that the solution is an accurate one.By employing the VOF method,details of the evolution of green water including water running onto the deck,water propagating on the deck,water impacting the vertical wall,wave breaking and also water spray are successfully modeled.Calculation practice shows that large-scale parallel computation technique is a highly efficient and reliable way to solve the highly non-linear problem like green water.