On Rogue Waves Generated by Abrupt Depth Transitions
On Rogue Waves Generated by Abrupt Depth Transitions
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关于突然深度转变产生的异常波
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
T. Adcock
中科院分区：
文献类型：
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作者：
Zhen;T. Tang;S. Draycott;Yan Li;T. S. van den Bremer;T. Adcock
波浪在不同水深上的传播被认为是引起异常波浪的可能机制之一。在本文中，我们使用一个完全非线性的势流求解器，海洋-Wave 3D，来模拟的过程中，波的传播超过可变的水深和分析运动学下的自由表面附近的斜坡。为了实现这一目标，我们首先评估Ocean-Wave 3D生成的数值结果的准确性。我们进行收敛性测试，以检查不同的参数在OceanWave 3D的数值结果的影响。基于验证和验证测试，我们评估的准确性OceanWave 3D的问题与变量测深比较数值和实验结果。我们发现，OceanWave 3D是足够准确的解决方程的问题，突然的深度过渡和实验结果和数值结果之间的协议是好的。最后，我们调查的运动学，我们发现，斜坡不仅可以放大波峰振幅，但也增加了波的运动学附近的斜坡，这对海洋结构物上的负载有明显的影响。
Wave propagation over variable bathymetry is known as one of the possible mechanisms that can provoke rogue waves. In this paper, we use a fully nonlinear potential-flow solver, Ocean-Wave3D, to simulate the process of waves propagating over variable bathymetry and analyse the kinematics under the free surface near the top of the slope. To achieve this, we first evaluate the accuracy of the numerical results generated by Ocean-Wave3D. We carry out convergence tests to examine the influence of different parameters in OceanWave3D on the numerical results. Based on verification and validation tests, we evaluate the accuracy of OceanWave3D for problems with variable bathymetry comparing numerical and experimental results. We find that OceanWave3D is accurate enough to solve equations for problems with abrupt depth transitions and the agreement between experimental results and numerical results is good. Finally, we investigate the kinematics and we find that a slope can not only amplify crest amplitudes but also increase the wave kinematics near the top of the slope, which has obvious implications for loads on offshore structures.