Hexahedral (hex) meshes can be generated for CAD models of complex thin-walled components by isolating thin-sheet and long-slender regions, quad meshing one of the bounding faces, and sweeping the quad mesh through the volume to create hex elements. Continuing the work in Sun et al. (Proc Eng 163:225–237, 2016), where an improved approach to thin-sheet identification was presented, an enhanced automatic method for long-slender region identification is proposed in this paper. The objective is to improve the efficiency and decomposition quality compared to existing long-slender region identification processes. Geometric measures such as the edge length and the face width are employed to generate sizing measures, which are in turn used to identify candidate long-slender regions. Careful consideration is given to the generation and positioning of the cutting faces required to isolate the long-slender regions by assessing a priori quad mesh quality on the wall faces. It is shown that a significant reduction in the number of degrees of freedom (DOF) can be achieved by applying anisotropic hex elements on the identified regions.
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机译：可以通过隔离薄板区域和长条形区域，对边界面之一进行四边形网格划分以及将四边形网格物体扫过整个体积以创建六边形元素，从而为复杂的薄壁部件的CAD模型生成六面体（hex）网格。继续在Sun等人的工作。 （Proc Eng 163：225–237，2016），其中提出了一种改进的薄片识别方法，本文提出了一种增强的自动长条区域识别方法。与现有的细长区域识别过程相比，目标是提高效率和分解质量。采用诸如边缘长度和面宽之类的几何度量来生成尺寸度量，然后将其用于识别候选的长细长区域。通过评估壁面上的先验四边形网格质量，仔细考虑了隔离长条区域所需的切割面的生成和位置。结果表明，通过在所识别的区域上应用各向异性的六边形元素，可以显着减少自由度（DOF）的数量。
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