電車内環境中の高周波電磁場の大規模並列有限要素解析
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概要
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This paper presents large scale finite element analyses of high frequency electromagnetic waves in commuter trains. The ADVENTURE_Magnetic is one of the main modules of the ADVENTURE system, which is an open source parallel finite element analysis system, and is able to solve eddy current and magnetostatic problems using a hierarchical domain decomposition method (HDDM) with an iterative linear algebraic solver. In this paper, we improve the module so as to solve a high frequency electromagnetic wave field of 500-1000[MHz]. A stationary Helmholtz equation for electromagnetic wave problems is solved taking the electric field as an unknown function. In this study, stable convergence is achieved by adding a stabilization term. Basic performance of the module is first investigated solving a simple model. Then a part of a commuter train with seats, handrails and two human bodies is precisely modeled into a large scale finite element mesh with Nedelec elements of about 5.2 millions DOFs. The results prove that the improved module can predict precisely the distribution of the electromagnetic field produced by mobile phones inside commuter trains.
- 日本シミュレーション学会の論文
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