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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：电子学报

所属单位：建设工程学部

期号：1

页面范围：200-205

ISSN号：0372-2112

摘要：Isogeometric analysis (IGA) based on the non-uniform rational B-splines (NURBS) has integrated the advantages of Computer Aided Design (CAD) and the finite element method (FEM). The main feature of IGA is the usage of one common geometry representation for creating CAD models, for meshing, and for numerical simulation. However, IGA based on one single NURBS patch is difficult to deal with the inhomogeneous mediums and complex multiply connected domains because of the limitation of the NURBS patch topology. In this paper, IGA based on the patch splicing is used to solve the waveguide eigenvalue problem of this kind. The control points and meshes of different patches must coincide on the interface, even after refinement. The Helmholtz governing equation can be discreted using the Galerkin procedure. Numerical examples are presented to show that IGA possesses the advantages of better convergence on a per-degree-of-freedom and high accuracy. © 2016, Chinese Institute of Electronics. All right reserved.

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