摘要
冲淤计算是河流、河口、海岸等水域中分析、预测床面变化的基础。利用非结构网格自动剖分技术形成覆盖计算区域的三角网 ,能较好地适应边界和特殊地形 ,基于高程内插建立三角网数字高程模型 ,采用垂直三棱柱体作为基本单位计算不同时段冲淤量 ,从而提高计算精度。通过网格剖分 ,利于在计算区域内任意选择子域进行冲淤量的计算和分析。同时将生成的非结构网格直接用于二维床面冲淤数学模型 。
Computation of erosion and deposition on the bed surface is a foundation of predicting bed variations in rivers, estuaries and seas. Triangular meshes are automatically generated by a new non-structure grid generation technique, which can well adapt to complex boundaries and special topographies in the whole calculation area. Then the digital elevation model based on the triangular grids is established through interpolation, and thus erosion and deposition in various intervals can be computed from basic units of triangular prism in order to improve computational precision. Through the computer processing of erosion and deposition, the variations of bed surface in the arbitrarily selected areas are ecasily computed and analyzed. Moreover, the generated grid is directly applied to a 2-D mathematical model for erosion and deposition on the bed surface so that the results calculated from each node can be verified to enhance the reliability of the mathematical model.
出处
《海洋工程》
CSCD
北大核心
2001年第4期100-104,共5页
The Ocean Engineering
基金
国家自然科学基金项目 ( 5 0 0 790 2 5
5 97790 10 )
交通部九五重点科技项目 ( 95 -0 5 -0 2 -14 )
