曲面有限元网格引线织就生成法

离散曲面边界并初始化可出发构造新单元的单元边线段序列,依次从序列中的单元边线段出发,采用线段定向布点法或圆定向布点法,构造用于确定新节点生成位置的待选点集。从待选点集或曲面上已有的网格节点选择合适的点参与新单元的构造,并利用曲面参数域检查新单元的网格拓扑相容性。随节点、单元边线段和新单元交替生成,最终生成符合有限元分析要求的曲面网格。关键区域网格的自适应加密,则采取网格密度规划方式,通过构造曲面有限元自适应网格单元尺寸信息场来加以实现。

VECTOR-LEAD METHOD FOR SURFACE FINITE ELEMENT MESH GENERATEION

A list of element edges can be initialized after partitioning surface boundary, and then new elements can be generated alternately from the element edges in the list. To locate a new node based on the element edge with which a new element is to be constructed, a point set is generated oriented to a segment or a circle directed by a vector along which new node is suitable to be decided. The suitable point in the set or a suitable node existing in current mesh is selected to construct new element with that element edge. The mesh topological compatibility of the new element is checked with the corresponding mesh in the parameter field of the surface. With the alternate generation of new node, new element edge and new element, surface finite element mesh is generated successfully as a result. To generated adaptive mesh, an information field is built after programming mesh density information in the key areas. It is used to decide the size of new element dynamically according to the location of the element edge from which the new element is to be constructed.