Shipping water events that propagate over the decks of marine structures can generate significant loads on them. As the configuration of the structure may affect the loading behaviour, investigation of shipping water loads in different structural conditions is required. This paper presents a numerical investigation of the effect of deck roughness and deck length on vertical and horizontal loads caused by shipping water on a fixed structure. Systematic analyses were carried out of isolated shipping water events generated with the wet dam-break method and simulated with OpenFoam Computational Fluid Dynamics toolbox. The numerical approach was validated and then the shipping water loads were examined. It was found that, as roughness increased, the maximum vertical and horizontal loads showed a delay. As the deck length reduced, the vertical backflow loads tended to increase. These results suggest it may be worthwhile examining the behaviour of shipping water as it propagates over rough surfaces caused by fouling, corrosion, or those with small structural elements distributed on them. Moreover, the effect of deck length is important in understanding the order of magnitude of loads on structures with variable deck lengths, and those which have forward and backflow loading stages.

中文翻译：

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评估甲板粗糙度和长度对航运水载荷影响的 CFD 数值研究

在海洋结构的甲板上传播的航运水事件会对它们产生显着的负载。由于结构的配置可能会影响载荷行为，因此需要研究不同结构条件下的航运水载荷。本文介绍了甲板粗糙度和甲板长度对固定结构上由航运引起的垂直和水平载荷的影响的数值研究。对使用湿式溃坝方法生成的孤立航运水事件进行了系统分析，并使用 OpenFoam 计算流体动力学工具箱进行了模拟。验证了数值方法，然后检查了航运水载荷。结果表明，随着粗糙度的增加，最大垂直和水平载荷出现延迟。随着甲板长度的减少，垂直回流负荷有增加的趋势。这些结果表明，当航运水在由污垢、腐蚀或分布在其上的小结构元素引起的粗糙表面上传播时，可能值得研究航运水的行为。此外，甲板长度的影响对于理解具有可变甲板长度的结构以及具有正向和回流加载阶段的结构的载荷大小顺序很重要。