摘要
提出并实现了一种从边界到内部的组合裁剪曲面的有限元网格划分算法.首先通过寻找曲面间的公共边界,建立相邻曲面间连接的拓扑关系,并在边界上规划网格结点;然后通过建立和更新结点边环及网格单元的拓扑结构并进行几何计算,逐渐向内生成网格;最后对网格进行调整.由于该网格生成方法首先较好地处理了曲面边界,有效地消除了相邻曲面网格之间的错位和裂缝,使得在曲面间连接处的网格合并、重构、缝合等网格修理工作量明显减少,而且边界附近的网格形状较理想,组合曲面上的网格大小均匀,因此较适合于有限元计算.
An algorithm of generation of finite element meshes for composite surfaces was presented. The approach includes. (1) finding the common edges between conjoint surfaces, seeding nodes at the boundaries of composite surfaees; (2) the generation of the elements towards the surface interior by building and updating the topological relation of loops and elements and geometrical calculation; (3) adjusting the elements. The algorithm avoids the gaps between conjoint surfaces availably, decreases the merging, reconstructing and sewing the elements near the surfaces' boundaries. The uniformly elements obtained adapt the finite element analysis.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2006年第5期810-813,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(60473121)
关键词
有限元
网格
计算机辅助设计
计算机辅助制造
finite element
mesh
computer aided design
computer aided manufacture