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Publicações
Datta, R. e Guedes Soares, C. (2010), “NURBS Based Scheme for Automatic Quadrilateral Mesh Generation for FE and BIEM Analysis”, Proceedings of the 11th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS 2010), 19-24 Setembro, Rio de Janeiro, Brasil, pp. 815-822
In this paper, a Non Uniform Rational B-Spline (NURBS) based approach is proposed to generate structured quadrilateral meshes over three dimensional surfaces. The surfaces to be meshed are defi ned by NURBS. The surfaces can also have a hole of arbitrary shape. Initially an adaptive subdivision scheme is applied to split the surface in the parametric domain to match the boundary nodes, and then the mesh generation process reduces to the formation of nodes and elements in the parametric domain. In order to do that, special care is taken to maintain the continuity of the splitted surfaces. The primary objective of this paper is to recognize the neighbouring surfaces and split automatically to match the boundary points. None of the presently available CAD software has this type of feature. The proposed scheme is applied initially with simply connected surface, and then it is applied for more complicated structures. Finally the proposed method is applied to a part of a ship shaped body consisting with planar and curved surfaces to demonstrate the effectiveness of the proposed algorithm.
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