基于模板法的全四边形有限元网格生成器的研制

Pattern Module's Method: Development of Full Quadrilateral Finite Element Mesh Generator

利用映射法生成全四边形网格时存在两个问题 :一是网格疏密过渡难 ,二是自动化程度不高 .模板法可以有效地解决第一个问题 ,文中介绍了它的基本思想和几种在正方形亲单元内部构建模板的思路 .另外 ,为了提高网格生成的自动化程度 ,文中通过节点尺寸参数的定义自动完成网格的疏密布置 ,而且提出并实现了一种实体分组信息自动形成的算法 .

There are two problems when using mapping method to generate all quadrilateral meshes: one is difficulty of mesh transition; the other is low degree of automation. The pattern module's method can resolve the first problem effectively. This paper introduces its basic concept and some ways of constructing pattern module in a parent square. Then, in order to improve the automation degree of mesh generation, the mesh density is controlled according to the definition of element size field and a new algorithm to get the sub-domain information of a model automatically is proposed.