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首页> 外文期刊>International Journal of Offshore and Polar Engineering >Numerical and Experimental Modeling of Regular Wave Interacting with Composite Breakwater
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Numerical and Experimental Modeling of Regular Wave Interacting with Composite Breakwater

机译：规则波与复合防波堤相互作用的数值和实验建模

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摘要

Numerical modeling of the interaction between waves and coastal structures is a challenge due to the many nonlinear phenomena involved, such as wave propagation, wave transformation with water depth, interaction between incident and reflected waves, runup/rundown and wave overtopping. For simulating such complex free-surface flows, numerical models based on Lagrangian formulation, such as Smoothed Particle Hydrodynamics (SPH), are on option. Even though validation of these numerical models is essential, comparing numerical results with experimental data is not an easy task. In the present paper, an SPH numerical model is validated comparing numerical results of waves interacting with a composite breakwater with data obtained from physical model tests carried out in one of the LNEC's flumes. To achieve this validation, the experimental setup was determined to be compatible with the characteristics and capabilities of the numerical model. Therefore, the flume dimensions are exactly the same for both the numerical and physical model and conditions of wave generation are identical, which allows determining the accuracy of the numerical model, particularly regarding complex phenomena such as wave propagation, wave-breaking and impact loads on the vertical front of the composite breakwater. The numerical results agree well with the physical model tests. The free-surface level is well estimated, with a concordance index between 90% and 97%. Pressure at the vertical wall shows impact loads with high intensity and short duration with a concordance index between numerical and experimental of about 80%.
机译：由于涉及许多非线性现象，例如波传播，波与水深的转换，入射波与反射波之间的相互作用，上升/下降和波面过高，波浪与海岸结构之间相互作用的数值模型是一个挑战。为了模拟这种复杂的自由表面流动，可以选择基于拉格朗日公式的数值模型，例如平滑粒子流体动力学（SPH）。尽管验证这些数值模型至关重要，但将数值结果与实验数据进行比较并非易事。在本文中，通过将波浪与复合防波堤相互作用的数值结果与在LNEC的一个水槽中进行的物理模型测试获得的数据进行比较，验证了SPH数值模型。为了实现这一验证，确定实验设置与数值模型的特征和功能兼容。因此，数值模型和物理模型的水槽尺寸完全相同，并且波浪产生的条件相同，这使得可以确定数值模型的准确性，特别是对于复杂的现象，例如波浪传播，波浪破碎和冲击载荷复合防波堤的垂直前部。数值结果与物理模型试验吻合良好。自由表面水平得到了很好的估计，一致性指数在90％到97％之间。垂直壁上的压力显示出高强度，短持续时间的冲击载荷，数值与实验之间的一致性指数约为80％。

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