海岸破碎带植物消浪数值模拟研究

Numerical simulation of vegetation-induced wave dissipation in the surf zone

沿海防浪林能形成柔性的植物消浪体系,可以有效降低风暴潮灾害。由于防浪林消浪效果受波浪、近岸水深及植物等多重因素的影响,消浪机理较为复杂,以往的系统研究成果较少。本文以立面二维自由面紊流模型为工具,建立了基于植物冠层特征的多孔介质模型,精细地模拟了破碎波对植物带的冲击,并与物理模型试验结果进行了对比验证,计算分析了植物带宽度、植物密度、滩地水深等因素对消浪效果的影响。

Wave-proof plants along sea walls can effectively counteract the damage caused by ocean disasters like storm surges and typhoon waves. However, most current researches merely focus on the wave dissipation rate, and concern little about vegetation natures such as plant width, density and height, or hydrodynamic characteristics like wave conditions and water depth. Therefore, this work was conducted to make up for this scarcity. Based on two-dimensional swirl models, a porous media model was established to simulate wave propagation into the vegetated area under circumstances of different vegetation parameters and water depths. Meanwhile, the principle of wave breaking in the coo-hydraulic system was also investigated.