大连长兴岛北港区波浪条件数值模拟研究

利用国际通用的MM5风场模式和SWAN浪场模式,通过推算影响工程海域的台风和寒潮大风天气过程,得到工程海域-30 m等深线处不同重现期设计波要素,然后采用MIKE 21 NSW和BW波浪数学模型,对工程规划方案设计波要素和港内波况进行了计算。结果表明:工程受N向和NNE向风浪影响相对较大,外海波浪传播至防波堤处无明显衰减;设计高水位重现期50 a时防波堤处最大H1%约7.3 m;防波堤对港内围堰掩护较好,建成后港内波浪条件明显改善。

Numerical simulation research on wave condition in north harbor area of Dalian Changxing Island

Using international general MM5 wind model and SWAN wave model, the typhoon and the cold- wave process which influenced the project sea area were calculated, and the design wave elements for different return periods at -30 m depth were obtained. Then using MIKE 21 NSW and BW wave mathematical model, the design wave elements and wave conditions were calculated. The results show that： the N and NNE wind waves have a great influenee on the project, and the wave propagation from the outside sea area to breakwater has no significant attenuation. The design wave height H1% at high water level with 50 a return period is about 7.3 m, and the wave condition of cofferdam and harbor are improved with eompletion of breakwater.