三维实体有限元自适应网格规划生成

3D Finite Element Adaptive Mesh Generation

为实现三维实体有限元网格自适应生成,设计了中心点、沿指定曲线和基于实体表面等网格加密生成方式;并根据分析对象几何特征和物理特性经验估计,以规划的方式构造自适应网格单元尺寸信息场·在此基础上,提出基于Delaunay剖分的动态节点-单元一体化算法,生成几何特征和物理特性整体自适应的有限元网格·

In this paper, various modes such as center-point mode, datum-curve mode, datum-surface mode, are designed for generating graded finite element mesh in the special areas of the solid object to be analyzed. After selection of appropriate modes to act on the special areas according to the geometric and physical features, an information field of element size is built in a manner of projection. An algorithm based on Delaunay triangulation is developed for adaptive mesh generation, in which element size changes dynamically. The method is applied successfully to 3D finite element adaptive mesh generation, by taking the geometric and physical features of the solid object well into consideration.