Combining Quadrilateral and Triangular Meshing Using the Advancing Front Approach
Combining Quadrilateral and Triangular Meshing Using the Advancing Front Approach
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发表时间：
1997
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通讯作者：
M. Rees
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作者：
M. Rees
一个全自动的网格已经开发，这是能够生成四边形和三角形单元在2-D和表面上使用前进的前沿算法。这允许形成范围从全四边形或几乎全四边形到全三角形的网格。在混合单元网格中，存在的三单元数由用户指定的最大允许四倍失真水平决定。三角形元素是在局部重新网格化过程中添加的，并且只有在尝试在剩余网格区域的每一段添加可接受的四边形元素失败后才添加。通过这种方式，用户可以确保避免不可接受的扭曲四边形，并将三角形元素的数量保持在最低限度。网格增强技术进一步消除了三角形单元，提高了单元质量。
A fully automatic mesher has been developed which is capable of generating both quadrilateral and triangular elements in 2-D and on surfaces using the advancing front algorithm. This allows the formation of meshes which range from being all-quad or nearly all-quad down to all-triangular. In mixed-element meshes, the number of tri elements present is dictated by the maximum allowable level of quad distortion spec-iied by the user. Triangular elements are added during localized remeshing and only after attempts to add acceptable quadrilateral elements at every segment of the remaining mesh area have failed. In this way, the user is assured that unacceptably distorted quadrilaterals are avoided and the number of triangular elements is kept to a minimum. Mesh enhancement techniques further eliminate triangular elements and improve element quality.