有限元网格自动生成的组合处理方法

Cooperative treatment scheme for automatic finite element mesh generation

给出有限元网格自动生成的相互配合协调处理的新方案，它处理的是平面上任意形状的多连通区域．边界描述采用边界顶点序列法，生成有限元分析的单元以四边形元（八点元或四点元）为主；根据边界形状的复杂性辅以三角形元（六点元或三点元）．所建议的组合处理方法具有容易控制网格密度、确保有限元分析中的单元质量、对于指定点（如集中荷载作用点或支撑点）可以自动成为网格的结点、可实现无人工控制的有限元网格自动生成等特点，对于有限元重分析系统尤其表现出高效率．本方法可推广到相当广泛一类三维问题中，在并行处理方面也有很大的潜力．

The cooperative treatrnent scheme has the following advantages : to control the density of mesh easily,to ensure the quality of elements in finite element analysis,to convert the assigned point into the node of mesh automatically ,to realize automatic finite element mesh generation without the need for user intervention. It is easy to be added in the integrated system or self-adaptive system of finite element analysis,and shows high efficiency especially for reanalysis.The scheme can be spread to a quite extensive kind of three-dimensional automatic element mesh generation,and has a powerful potential about the parallel processing.