Focused waves and wave-structure interaction in a numerical wave tank
Focused waves and wave-structure interaction in a numerical wave tank
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DOI：
10.1016/j.oceaneng.2011.12.016
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发表时间：
2012-05
影响因子：
5
通讯作者：
J. Westphalen;D. Greaves;Christopher Williams;A. Hunt-Raby;J. Zang
中科院分区：
文献类型：
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作者：
J. Westphalen;D. Greaves;Christopher Williams;A. Hunt-Raby;J. Zang
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，由于极端海浪冲击造成的力量特别令人感兴趣，因为这些力量挑战了在这种恶劣环境下工作的结构和船员。理论模型往往局限于线性或弱非线性情况，无法预测破碎波与波浪对结构的冲击或绿水载荷相结合的猛烈和湍流效应。这种情况的经典方法是在物理波浪槽中进行比例模型试验，并在某些选定的位置测量力、水位和流速。另一种方法是使用全非线性计算，如计算流体动力学，它有可能在不同条件下研究全尺寸的设计。本文研究了数值波槽中极端聚焦波群的产生和特性。文中给出了这些极端波浪的非线性效应，并讨论了数值波浪槽的意义。此外，还计算了代表海上结构简单模型的水平和垂直圆柱体的受力。所有数值结果与物理实验的实测数据进行了比较。
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 non-linear 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. Non-linear 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.