| 摘要: |
| SWASH模型是一种新型的非静压时域波浪模拟。为了探讨SWASH模型对于解决近岸波浪传播变形问题的适用性，在对其控制方程、边界条件、数值解法等进行介绍的基础上，采用该模型分别模拟了正向规则波、斜向规则波和斜向不规则波入射条件下L形防波堤附近水域的波浪场和波生流场，并与物理试验结果进行对比。结果表明，SWASH模型较好地复演了波浪在近岸区域所发生的浅水变形、折射、破碎，以及堤前反射、堤内绕射等物理现象，波高沿断面的定量分布与试验结果吻合良好，同时较好地模拟了不同波况下防波堤附近水域的波生流场，说明该模型适用于复杂岸线和地形条件下波浪传播变形的数值模拟。 |
| 关键词: L形防波堤 SWASH模型 近岸波浪 波生流 波浪传播 波浪变形 |
| DOI： |
| 分类号:TV139.2 |
| 基金项目:国家自然科学基金面上项目(51379072)；水利部公益性行业科研专项经费资助项目(201201045) |
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| Numerical simulation of near-shore wave propagation and transformation based on a SWASH model |
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WANG Liang-cai1, CHEN Yong-ping2, HU Yu-zhi1
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1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University;2.College of Harbor, Coastal and Offshore Engineering, Hohai University
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| Abstract: |
| In recent years, a new type of phase-resolving wave model, SWASH, based on the non-hydrostatic shallow water equation, was developed to simulate the near-shore wave propagation and transformation. In order to examine the accuracy and robustness of the SWASH model, subsequent to the introduction of its governing equations, boundary conditions and numerical schemes, it is applied to simulate the propagation and transformation of normal regular waves, oblique regular waves or oblique random waves passing along a L-shaped breakwater, and the simulated results are compared with the experimental data. Analysis results show that the near-shore wave processes, such as wave shoaling, refraction, wave breaking, and reflection in front of the breakwater, wave diffraction behind the breakwater, and the wave-induced circulation flow around the L-shaped breakwater, are all well simulated. The numerical simulation results agree well with the experimental data, which indicates that the SWASH model can be used to simulate the wave propagation and transformation in the near-shore area having a complex topography. |
| Key words: L-shaped breakwater a SWASH model near-shore waves wave-induced current wave propagation wave transformation |
