摘要
从波向线微分方程和波散因子微分方程出发,进行波浪折射角θ和波散因子β的数值计算。在计算模型的设计上,建立了可在八个方向上作外推计算的统一公式,对计算点和计算方向实施了选择控制和扫描循环控制,可在复杂地形情况下算出结果。通过对地形模型和老黄河口海区的试算与比较,指出该方法可在实际中应用。
Contrast with traditional method of calculating wave refraction along wave rays,the refracted wave direction θ and ray separation β were in this paper numerically computed directly on grids in studied sea areas based on the differential equations of wave ray and ray separation.A new computation model was developed to calculate wave characteristics on grids for this purpose,in which the studied grid and computation direction were scanned and selected under control,and a uniform extrapolating formula valid for 8 different computation directions towards the grid was also developed to make the model useful in those sea areas with complex topography where the traditional computation method becomes invalid.With the model developed in this paper applied to an ideal sea area with tombolo topography and a real sea area in the Bohai Sea,it was shown that the results obtained from the new model were much more satisfactory than those from the traditional method.
基金
国家自然科学基金
关键词
网格点
波浪
折射
数值计算模型
Grids in Cartesian coordinate system
wave refraction
numerical computation model.
