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Feature moving operation of hexahedral mesh

Shen, Chun, Rui Wang, Shuming Gao, Maehama Hiroki

Proceedings, 26th International Meshing Roundtable, Elsevier, Science Direct, September 18-21 2017

INTERNATIONAL
MESHING
ROUNTABLE

26th International Meshing Roundtable
Barcelona, Spain
September 18-21, 2017

Chun Shen, State Key Lab of CAD&CG, Zhejiang University, Hangzhou,China, CN, smile123000@zju.edu.cn
Rui Wang, State Key Lab of CAD&CG, Zhejiang University, Hangzhou,China, CN, wang_rui@zju.edu.cn
Shuming Gao, State Key Lab of CAD&CG, Zhejiang University, Hangzhou,China, CN, smgao@cad.zju.edu.cn
Maehama Hiroki , Graduate School of Information Science and Technology Hokkaido University, JP, h_maehama@sdm.ssi.ist.hokudai.ac.jp

Abstract
In the product design process, the finite element mesh regeneration is an inevitable step, but it is time consuming. The mesh editing is a kind of an effective mesh regeneration technique. In this paper, a method for widely moving features of hexahedral mesh is proposed to satisfy application requirement. After the feature moving operation is applied to CAD model, the mesh deformation based on the mean value coordinates is carried out in the corresponding deformed region of the hex mesh to decrease the possible inverted elements caused by a wide range deformation. Then, the parameters of generating the density field are extracted from the initial hexahedral mesh, and used to calculate the local target density field by considering the geometric and topological information on the deformed region. Finally, based on difference between current density field and target density field of deformed region, the local refining and coarsening operations are devised and conducted to make the deformed region compatible with the target density field. Experimental results for the mechanical parts verify the effectiveness of proposed method.

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