著者
武居 周 杉本 振一郎 荻野 正雄 吉村 忍 金山 寛
出版者
日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」
雑誌
理論応用力学講演会 講演論文集
巻号頁・発行日
vol.58, pp.18, 2009

高周波電磁場の大規模有限要素解析において階層型領域分割法が有用である.反復型領域分割法において部分領域解法にLDLT分解法に基づく直接法を適用し,インターフェース問題の収束性が改善したことによって,従来手法では困難であった5,000万複素自由度規模の空洞共振器解析が可能となったので,本講演会にて報告する.
著者
武居 周 室谷 浩平 吉村 忍 金山 寛
出版者
Japan Society for Simulation Technology
雑誌
日本シミュレーション学会論文誌 (ISSN:18835031)
巻号頁・発行日
vol.4, no.3, pp.81-95, 2012 (Released:2012-12-15)
参考文献数
27
被引用文献数
3

This paper describes a method of making mesh models for large-scale full-wave analysis of electromagnetic fields by the finite element method with an iterative domain decomposition method using numerical human body models. Numerical human body models by National Institute of Information and Communications Technology (NICT) composed by the voxel data with all sides of 2mm include skins, blood vessels, bones etc. and internal organs distinguishing with the material flag. The user can evaluate electromagnetic filed distribution inside the body using NICT numerical human models. A stationary vector wave equation for the 3D full-wave electromagnetic field analysis is solved taking an electric field as an unknown function. The mesh is efficiently divided by using the domain decomposition data structure when elements of 200 million or more are generated from the voxel data of NICT numerical human body models. The mesh generation method corresponds to a past 32-bit I/O library in the ADVENTURE System. Numerical analyses are done using torso models and whole body models. The results prove that our method can precisely predict the distribution of the electromagnetic field in human bodies inside.
著者
塩谷 隆二 金山 寛 淀 薫
出版者
一般社団法人日本機械学会
雑誌
日本機械学会九州支部講演論文集
巻号頁・発行日
vol.2000, no.53, pp.103-104, 2000-03-13

For 3-dimensional large scale finite element analysis, automating of mesh generation is one of important process for automating of whole finite element analysis system. But for 3-dimensional automatic mesh gemeration method with internal boundary surface has not been developed unlike for 2-dimensional one. In order to solve this issue, in this study we developed an automatic generation mesh system with internal boundary surface using 3-dimensional Delaunay triangulation.