中文摘要：

选取浙江北部嵊泗海域作为研究对象,以大、小网格嵌套的SWAN模型在龙口前沿的波要素计算结果作为BW模型的边界条件,在两个模型的联合应用下模拟了舟山泗礁换流站掩护区外和掩护区内的波浪场分布。结果表明,外海E、ESE、SE向来波传至马关围堤前沿海域时波向已偏转成SSE向,其中ESE向来波下龙口前沿的波高最大,进入掩护区后绕射波的衰减较为明显,将绕射波与局地风浪叠加,得到了泗礁换流站100 a一遇、50 a一遇的设计波要素,其有效波高分别为1.08、0.98 m。SWAN模型与BW模型的联合应用,使得掩护区内外大跨度地形下的波浪折射、绕射、反射等现象均得到了高精度的模拟,在舟山泗礁换流站设计波浪计算中具有良好的适应性。

英文摘要：

Taking the Shengsi sea in north of Zhejiang as the research area, the distributions of the wave field inside and outside the protected areas of Zhoushan Sijiao converter station are simulated by the combined application of SWAN model with nested grids and BW model, while the results of the wave factors in front of the cofferdam gap by SWAN model are taken as the boundary conditions of BW model. The results show that the wave directions turn to SSE when the E, ESE, SE direction waves propagate from the outside sea areas to the front of the Maguan dike, and the maximum wave height of the front of the cofferdam gap is from the ESE direction. The diffraction waves attenuate obviously when the waves enter the protected areas, and the design wave factors with 100-year retum period and 50-year return period are obtained by the superposition of the diffraction waves and the local wind waves, i. e. the significant wave heights of 1. 08 m and 0. 98 m. The phenomena of wave refraction, diffraction, and reflection within the large range of the bathymetry inside and outside the protected areas is simulated with high precision, so the combined application of SWAN model and BW model in Zhoushan Sijiao converter station achieves good efficiency on the design wave calculation, thus it will provide reference for design wave calculations of similarprojects.