KMS Of Academy of mathematics and systems sciences, CAS
| Multi-scale asymptotic analysis and computation of the elliptic eigenvalue problems in curvilinear coordinates | |
Ma, Qiang1; Li, Zhihui2,3; Cui, Junzhi4
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| 2018-10-01 | |
| Source Publication | COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
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| ISSN | 0045-7825 |
| Volume | 340Pages:340-365 |
| Abstract | A novel second-order two-scale asymptotic method is presented for the eigenvalue problems of the second-order elliptic operator in the general composite domain. The eigenvalue equation is firstly reformulated in curvilinear coordinates with periodic configuration using proper coordinate transformation, and by applying the asymptotic expansion technique, the eigenfunctions of the system are expanded to the second-order terms. Using the argument of the so-called "corrector equations", the eigenvalues are expressed in terms of the homogenized eigenfunctions and the cell functions are defined in the representative cell domain. The feature of the proposed model is that some homogenized material coefficients and all the microscopic cell functions are dependent on the macroscopic coordinates. Various reduced expressions of the eigenfunctions and eigenvalues are discussed under specific coordinate transformations, and the conditions that the cell functions and homogenized coefficients are decoupled from the macroscopic coordinates are elaborated. The finite element algorithm is developed and three numerical experiments are carried out, which demonstrate the effectiveness of our proposed method in simulating and predicting the vibration behavior of the composite structures. It is also indicated that the second-order correctors are of necessity to capture the locally oscillating behavior within a periodicity of the eigenfunctions. By the coordinate transformation, the asymptotic analysis method can be generalized to more general composite domain with quasi-periodic and non-periodic configurations. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Homogenization method Multi-scale asymptotic expansion Eigenvalue problems Finite element approximation Coordinate transformation |
| DOI | 10.1016/j.cma.2018.05.035 |
| Language | 英语 |
| Funding Project | National Key Basic Research and Development Program[2014CB744100] ; National Nature Science Foundation of China[11325212] ; National Nature Science Foundation of China[91530319] ; China Postdoctoral Science Foundation[2016T91019] ; Fundamental Research Funds for the central Universities |
| WOS Research Area | Engineering ; Mathematics ; Mechanics |
| WOS Subject | Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics |
| WOS ID | WOS:000442385600016 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.amss.ac.cn/handle/2S8OKBNM/31087 |
| Collection | 计算数学与科学工程计算研究所 |
| Corresponding Author | Li, Zhihui |
| Affiliation | 1.Sichuan Univ, Coll Math, Chengdu 610043, Sichuan, Peoples R China 2.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Peoples R China 3.BUAA, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China 4.Chinese Acad Sci, Acad Math & Syst Sci, ICMSEC, LSEC, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Ma, Qiang,Li, Zhihui,Cui, Junzhi. Multi-scale asymptotic analysis and computation of the elliptic eigenvalue problems in curvilinear coordinates[J]. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING,2018,340:340-365. |
| APA | Ma, Qiang,Li, Zhihui,&Cui, Junzhi.(2018).Multi-scale asymptotic analysis and computation of the elliptic eigenvalue problems in curvilinear coordinates.COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING,340,340-365. |
| MLA | Ma, Qiang,et al."Multi-scale asymptotic analysis and computation of the elliptic eigenvalue problems in curvilinear coordinates".COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 340(2018):340-365. |
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