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Sheet operation based block decomposition of solid models for hex meshing
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DOI：10.1016/j.cad.2016.07.016.png)
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摘要
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High quality hex mesh can be effectively generated based on a block structure of a solid model, but existing approaches to block decomposition of the solid model are still far from expectations. In this paper, we propose a new method to decompose the solid model into a block structure using sheet operations, which guarantees the validity of the resulting block structure. The method first generates an initial hex mesh of a given solid model based on its tet mesh. Then, a number of fundamental sheets and high-quality curve related sheets are inserted on the boundary and inside the initial hex mesh respectively by sheet inflation to capture the geometry of the solid model. Finally, a reasonable and valid block structure for the solid model is obtained by extracting all of the original sheets as a whole as well as an optimal deletable sheet set determined by quality prediction. Experimental results prove the effectiveness of the proposed method. (C) 2016 Elsevier Ltd. All rights reserved.
Keyword:
Block decomposition
Hexahedral mesh
Mesh generation
Sheet operation
Geometric validity
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