【摘要】 在岩土工程中 ,基于实体造型进行六面体网格剖分时 ,材料分界面在实体系统中的存在往往会给网格的生成带来很大的约束 .针对这一问题 ,建议在实体造型阶段取消一些给剖分带来几何拓扑困难的材料分界面 ,从而简化网格剖分 ;进而以模糊数学为工具 ,对于难以确定材料属性的单元 ,首先建立单元对各个材料区域的隶属度 ,然后以相应的隶属度为权值 ,通过对基本材料属性加权平均求得单元的材料参数 .实践证明 ,这种方法不仅精度较高 ,而且易于计算机编程实现 ,特别适用于岩土工程中对几何形状以及材料分区复杂的三维区域剖分六面体网格更多还原

【Abstract】 In the hexahedral finite element meshing based on solid modeling, the presence of material interfaces in solid models sometimes brings about great geometrical and topological difficulties. In order to simplify meshing, the transitional_zone method is presented. The main idea is that the whole region to be meshed without consideration of some trouble_making material interfaces firstly. Then the material properties of elements can be calculated through the weighting factor aggregate of divisional material properties, where the weighting factors can be derived from the degree of membership of elements to divisions. This method, proved to be quite accurate and readily applicable in computer programming, is especially suitable for the hexahedral meshing of irregular domains composed of many material divisions in geotechnical engineering.更多还原