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Focused waves and wave-structure interaction in a numerical wave tank

机译：数值波箱中的聚焦波和波结构相互作用

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Sustainable and efficient design solutions are the aim for any engineer. In offshore engineering forces resulting from extreme wave impact are of special interest as these challenge the structure and the crew working in this harsh environment. Theoretical models tend to be limited to linear or weakly nonlinear situations and are unable to predict the violent and turbulent effects of breaking waves in combination with wave run up on structures or green water loading. The classic approach for such cases is to carry out scale model tests in a physical wave tank and measure the forces, water levels and flow velocities at some chosen locations. Another approach is to use fully non-linear calculations, such as Computational Fluid Dynamics, which have the potential to investigate the design in different conditions at full scale. This paper deals with the generation and behaviour of extreme focused wave groups in a numerical wave tank. Nonlinear effects of these extreme waves are shown and the implications for a numerical wave tank are discussed. Also the forces on horizontal and vertical cylinders, which represent simple models of offshore structures, are calculated. All numerical results are compared with measured data from physical experiments.
机译：可持续和高效的设计解决方案是任何工程师的目标。在海上工程中，由极端波浪冲击引起的力量特别受关注，因为它们对结构和在恶劣环境下工作的船员构成了挑战。理论模型往往仅限于线性或弱非线性情况，并且无法预测与结构或绿水负荷上升相结合的浪潮的剧烈作用和湍流作用。针对此类情况的经典方法是在物理波箱中进行比例模型测试，并在某些选定位置测量力，水位和流速。另一种方法是使用完全非线性的计算，例如计算流体动力学，它有可能在不同条件下全面研究设计。本文讨论了数值波箱中极端聚焦波群的产生和行为。显示了这些极端波的非线性效应，并讨论了数值波箱的含义。还计算了水平和垂直圆柱体上的力，这些力代表了海上结构的简单模型。将所有数值结果与物理实验的测量数据进行比较。

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