基于线面混合骨架与形状分解的PolyCube六面体网格生成算法OA

Automatic generation of high-quality fully-hexahedral meshes remains a challenging problem in engineering applications.In this paper,a PolyCube hexahedral mesh generation method based on line-surface hybrid skeleton and shape decomposition is proposed.Compared to existing methods,the proposed approach is of higher computational efficiency and capable of generating hexahedral meshes with better quality and more flexible structures.The method consists of three main stages:First,the skeleton of the input model is decomposed structurally and geometrically to produce a high-quality partitioning of the model.Next,a minimum-volume oriented bounding box is constructed for each sub-region so as to setup a local frame that minimizes the alignment cost of all bounding boxes with respect to this frame.Finally,the aligned bounding boxes are combined to form a multi-cube structure from which the hexahedral mesh is extracted,fitted back to the input mesh and optimized.We have tested our method on a wide range of models.Compared to existing hexahedral mesh generation techniques,our approach can produce fully-hexahedral meshes with simpler singularity structures and higher element quality.