Computer-aided engineering (CAE) has emerged as an indispensable tool for facilitating engineering practices and driving industrial innovation. However, the insufficient quality and efficiency of discretizing complex computer-aided design (CAD) models significantly impede the advancement of CAE calculation accuracy and automation. The presence of “dirty” geometry leads to the fact that it is almost impossible to generate a traditional conforming mesh without geometry repair. In most instances, automating geometry repair proves to be even more challenging than meshing. To cope with intricate CAD model with “dirty” geometry, a novel binary tree surface subdivision method (BSSM) is proposed for automatically generated conforming and nonconforming meshes directly on CAD models. In contrast to the conventional conforming mesh, the nonconforming mesh allows for hanging nodes, thereby eliminating the limitations of the mesh conformance. This facilitates rapid transitions in mesh size for automatic mesh generation when dealing with “dirty” geometry. A series of numerical models employing BSSM are presented in this study. Results reveal that BSSM can automatically, efficiently and reliably generate high level quality mesh for arbitrary structures.

中文翻译：

---

一种二叉树非协调曲面网格生成方法


计算机辅助工程（CAE）已成为促进工程实践和推动工业创新不可或缺的工具。然而，复杂的计算机辅助设计（CAD）模型离散化的质量和效率不足，严重阻碍了CAE计算精度和自动化的进步。 “脏”几何体的存在导致这样一个事实：如果不修复几何体，几乎不可能生成传统的一致网格。在大多数情况下，自动化几何修复被证明比网格划分更具挑战性。为了应对具有“脏”几何形状的复杂 CAD 模型，提出了一种新颖的二叉树曲面细分方法 (BSSM)，用于直接在 CAD 模型上自动生成一致和不一致网格。与传统的一致性网格相比，非一致性网格允许悬挂节点，从而消除了网格一致性的限制。这有助于在处理“脏”几何体时自动生成网格，从而促进网格尺寸的快速转换。本研究提出了一系列采用 BSSM 的数值模型。结果表明，BSSM 可以自动、高效、可靠地为任意结构生成高质量的网格。