An efficient unstructured quadrilateral-dominated surface mesh generation algorithm is presented to generate high-quality surface elements for arbitrary geometry with tiny features or crack defects. For complex entities with proximity features, a novel type of meshing template has been proposed to solve the problem of entity boundary fitting of the outside-in grid-based method. The algorithm also works for regions with proximity features, as well as for arbitrary geometry with one or multiple cracks. The procedure incorporates aspects of well-known meshing techniques, but includes some original and efficient processes. The refinement field is constructed according to mesh size, boundary curvature, surface curvature and other geometry features. In order to effectively generate the core mesh, a fast intersection algorithm between topological elements and the solid boundary is established, which improves the efficiency of intersection calculation. The geometry-based techniques are employed for boundary matching of the core mesh. The method has been successfully employed in conjunction with the dual interpolation boundary face method (DiBFM). Several realistic geometries with cracks or proximity features are applied to demonstrate the accuracy and validity of the proposed approach.

中文翻译：

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一种有效的非结构化四边形主导的表面网格生成方法，适用于 DiBFM 中具有微小特征或裂纹缺陷的任意几何形状


提出了一种高效的非结构化四边形主导的表面网格生成算法，可以为具有微小特征或裂纹缺陷的任意几何形状生成高质量的表面单元。针对具有邻近特征的复杂实体，提出了一种新型的网格划分模板来解决基于外向网格方法的实体边界拟合问题。该算法还适用于具有邻近特征的区域，以及具有一个或多个裂纹的任意几何形状。该过程结合了众所周知的网格划分技术的各个方面，但包括一些原始且高效的过程。细化场是根据网格尺寸、边界曲率、表面曲率和其他几何特征构建的。为了有效生成核心网格，建立了拓扑元素与实体边界的快速求交算法，提高了求交计算的效率。基于几何的技术用于核心网格的边界匹配。该方法已成功与对偶插值边界面法（DiBFM）结合使用。应用几种具有裂纹或邻近特征的真实几何形状来证明所提出方法的准确性和有效性。