复杂区域四边形网格生成的一种改进方法

A new quadrilateral mesh generation method based on advancing front technique

提出了一种改进的四边形网格生成算法。该法在行波法生成平面三角形网格的基础上,将一个三角形单元分解为三个四边形单元。经过优化处理,获得优良的计算域四边形网格。针对岩土工程结构问题,还提出了网格剖分中尖灭不连续面和锚杆及锚索的处理方案。地下洞室和边坡算例表明了这种方法的可行性和可靠性。

A new method of automatic quadrilateral mesh generation is proposed. Based on the advancing front technique developed for triangular mesh generation, quadrilateral mesh can be generated by dividing each triangular element into three quadrilateral elements. After the mesh quality enhancement, a refined quadrilateral mesh can be obtained for the whole calculation domain. A scheme to treat discontinuities and bolts as well as anchors has been put forward for the geotechnical engineering structures, too. The underground cavern and landslide examples show the feasibility and robustness of the proposed method.