Non-linear Magnetostatic Analysis of a 100 Million DOF Problem with Hierarchical Domain Decomposition Method
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- Kanayama Hiroshi
- Kyushu University
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- Ogino Masao
- Kyushu University
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- Sugimoto Shin-ichiro
- The University of Tokyo
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- Zhao Jian
- Kyushu University
Bibliographic Information
- Other Title
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- 階層型領域分割法を用いた1億自由度の非線形静磁場解析
Abstract
This paper deals with a large-scale 3D non-linear magnetostatic analysis using the Hierarchical Domain Decomposition Method (HDDM). To improve the convergence of the interface problem of the HDDM and to reduce the computation time, the solution strategy of Finite Element Analysis (FEA) in subdomains is reexamined. Because our employed equation is singular, it has been solved by the iterative method such as the ICCG method. However, by applying the direct method for solving FEA in subdomains, it is expected that the convergence of the interface problem is improved by improvement of precision in subdomains and the computation time is reduced by storing matrices that are results of the LU decomposition on the main memory. Then, to solve FEA in subdomains by the direct method, the A method with the Lagrange multiplier p is considered. As a result, the convergence of the interface problem is much improved by improvement of precision in subdomain-wise analysis. Then, a non-linear magnetostatic problem with 100 million degrees of freedom is solved. Moreover, the computation time is reduced by 10-20%.
Journal
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- Transaction of the Japan Society for Simulation Technology
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Transaction of the Japan Society for Simulation Technology 2 (1), 1-8, 2009
Japan Society for Simulation Technology
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Keywords
Details 詳細情報について
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- CRID
- 1390001205300630016
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- NII Article ID
- 130004726281
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- ISSN
- 18835058
- 18835031
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed