期刊
COMPUTERS & STRUCTURES
卷 106, 期 -, 页码 125-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2012.04.014
关键词
Numerical method; Edge-based smoothed finite element method (ES-FEM); Acoustic; Dispersion error
资金
- National 973 project [2010CB328005]
- Scholarship Award for Excellent Doctoral Student
- Ministry of Education
- Open Research Fund Program of the State Key Laboratory of Advanced Technology of Design and Manufacturing for Vehicle Body, Hunan University, PR China [31175002]
- Centre for ACES
- Singapore-MIT Alliance (SMA)
- National University of Singapore
An edge-based smoothed finite element method (ES-FEM) is proposed to solve 3D acoustic problems in the mid-frequency range, using the simplest linear tetrahedron meshes that can be generated automatically for complicated geometry. In present ES-FEM, the gradient smoothing operation is performed with respect to each edge-based smoothing domain, which is also serving as building blocks in the assembly of the stiffness matrix. It turns out the ES-FEM provides an ideal amount of softening effect, and significantly reduces the numerical dispersion error in low- to mid-frequency range. Several numerical examples demonstrate the superiority of the ES-FEM for 3D acoustic analysis, especially at mid-frequency. (C) 2012 Elsevier Ltd. All rights reserved.
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