台州湾波浪条件数值模拟研究

依据台州湾外海的风浪资料建立数学模型,应用抛物形缓坡方程、Boussinesq方程及小风区成浪对工程区波浪条件进行计算,得到了工程区不同重现期波浪要素,并通过分析得到了工程区波浪年分频分级情况。通过计算与分析可知台州湾外海为台风大浪区;台州湾内由于受众多岛屿掩护,经过地形的折射、绕射和破碎影响,与外海相比波浪衰减达到50%左右;工程区NE向H1%波高约为6.5m,H4%波高超过1.0m的频率每年在20d以下,建港的波浪条件较好。

Numerical simulation research on wave condition in Taizhou Bay

According to the wind and wave data,mathematic model was set up.The parabolic mild-slope equation and Boussinesq equation were used to calculate the wave condition in Taizhou Bay including the design wave element and wave frequency and gradation yearly.The calculation results show there is the area of typhoon and strong wave outside Taizhou Bay,but the wave height inside Taizhou Bay would be decreased about 50% comparing with open sea,due to the shelter of islands,wave diffraction,wave refraction and wave breaking.The wave height of H1% is about 6.5 m from NE direction in the project area and there are less than 20 days when the wave height of H4% exceeds 1.0 m.The area is in good wave condition for harbor construction.