汎用非線形構造解析システムFINAS拡張・整備報告書(I)

Extension and maintenance of finite element nonlinear structural analysis system "FINAS" (I)

千葉 隆久*; 上野 睦郎*; 久保 文男*

not registered; not registered; not registered

本報告書は、高速増殖炉開発に伴う構造解析上のさまざまな問題を解決する有効な数値解析手段として開発されてきた汎用非線形構造解析システムFINAS***の昭和61年度の拡張・整備の成果について報告するものである。FINASは昭和55年までに、汎用構造解析システムとしての基本的な機能を備えたが、より広範囲かつ高度な問題に対して有効なシステムとするべく改良、拡張、整備を実施している。本年度は主として非弾性解析、大変形解析、破壊力学解析、流体構造連成解析、動的解析について拡張・整備を行なった。本報告書は昭和61年度の拡張・整備の詳細結果のほか、現状のFINASの解析理論と数値解法、プログラム検証および応用例についてまとめたものである。

A general purpose finite element nonlinear structural analysis system FINAS has been developed since 1976 for structural design of fast breeder reactor (FBR) components. Extension, improvement and maintenance of this system has been continued hitherto. This report describes the results of the work which was carried out during September 1985 to February 1986. FINAS is equipped with basic capabilities of a general purpose program as the results of the past ten years development. However improvement and enhancement of this system are needed to cover more wide range of problems. In this year, inelastic analysis, large deformation analysis, fracture mechanics analysis, fluid-structure interactions analysis and dynamic analysis were mainly extended, improved and developed. The first part of this report is the result of maintenance and extension obtained in this year. In the second part, the theory of structural analysis and numerical method employed in FINAS are described. Finally, numerical examples intended for verification and demonstration of applicability to practical problems are illustrated.