台风对舟山某渔港工程码头波况影响的模拟

Simulation on the influence of typhoon on the wave conditions of a fishing port project in Zhoushan

采用改进的藤田气压模型计算8114号台风风场,同时采用MIKE21 SW波浪数学模型模拟台风作用下的波浪场。通过数值模型计算,提供码头位置在台风过境时的波浪情况,为工程建设提供依据。计算结果表明:8114号台风期间,工程海域出现12级以上的西北向大风,登步岛码头水域的有效波高大约在2.5 m,西闪岛码头水域约为2.0 m;波浪周期约为4.5 s;登步岛码头和西闪岛码头水域波向均在W-NW向。从8114号台风过境时码头水域的波浪场模拟计算结果可以看出,外海波浪对工程水域影响不明显,工程水域仍受岛上局地风浪影响。

The improved Fujita pressure model is used to calculate the typhoon wind field No.8114,and the MIKE21 SW wave mathematical model is used to simulate the wave field under the typhoon.Through numerical model calculation,the wave situation of the wharf position in the transit of typhoon is provided,which provides the basis for engineering construction.The results show that during typhoon 8114,there was a Northwest gale with a magnitude of 12 or more in the engineering sea area;the effective wave height of Dengbu Island dock was about 2.5 m,and that of Xishan Island dock was about 2.0 m;the wave period was about 4.5 s;the wave directions of Dengbu Island dock and Xishan Island dock were in W-NW direction.From the simulation results of the wave field in the dock waters during the typhoon crossing,it can be seen that the outer sea waves have no obvious impact on the project waters,and the project waters are still affected by local wind and waves in the island.