| 谢宇轩,王广生,鱼 童,管大为.淹没式开孔半圆堤波浪力数值模拟研究*[J].水运工程,2025,(2):17-26 |
| 淹没式开孔半圆堤波浪力数值模拟研究* |
| Numerical study on wave force of perforated submerged semi-circular breakwaters |
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| DOI： |
| 中文关键词: 半圆形防波堤 潜堤 数值模拟 波浪力 浅水波 |
| 英文关键词:semi-circular breakwater submerged breakwater numerical simulation wave force shallow water waves |
| 基金项目:国家重点研发计划项目（2023YFE0126300）；
国家优秀青年科学基金项目（52122109） |
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| 中文摘要: |
| 新式的海岸防护系统对防波堤的堤顶高程、透水生态性提出了更高要求。基于雷诺平均纳维-斯托克斯方程建立三维波浪水槽，研究淹没状态下开孔半圆形防波堤在浅水波作用下的受力表现。结果表明：淹没在水下的半圆堤堤身受到的水平力和垂向力存在相位差，结构滑移危险时刻基本对应最大向岸水平力出现时刻。随着开孔率从0%增大至25%，水下半圆堤受到的向岸和离岸方向无因次水平力峰值分别减小了27.8%和39.8%。随着波浪周期减小和淹没水深增大时，淹没式半圆堤离岸滑移受力显著增大。经验公式对于长周期、极端淹没条件下的不开孔半圆堤总力做出了保守估计，并会进一步高估壁面开孔后的水下半圆堤所受的波浪力。 |
| 英文摘要: |
| The modern coastal protection systems place higher demands on the crest elevation and permeable of breakwaters.A three-dimensional numerical wave flume based on the Reynolds-averaged Navier-Stokes equations is established to investigate the wave force of submerged perforated semi-circular breakwaters under the action of shallow water waves.The results indicate that there is a phase difference between the horizontal and vertical forces acting on the submerged semi-circular breakwater,with the critical sliding moment generally corresponding to the moment of maximum shoreward horizontal force.As the perforation rate increases from 0% to 25%,the dimensionless maximum shoreward and seaward horizontal forces on the submerged semi-circular breakwater decrease by 27.8% and 39.8%,respectively.With decreasing wave period and increasing submergence depth,the seaward sliding force on the submerged semi-circular breakwater increases.Empirical formulas provide conservative estimates for the total force on unperforated semi-circular breakwaters under long-period waves and extreme submergence conditions,and further overestimate the wave forces on submerged perforated semi-circular breakwaters. |
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