構造物の荷重経路U^*解析におけるFEM計算の高速化

概要

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The parameter U^* has been introduced by the authors to indicate load paths in a structure. The most serious problem encountered when calculating U^* for actual structures is the high computation time required. In this study, we propose two methods for reducing the time of FEM calculations required to obtain U^* distributions. In the first method, essential terms are extracted from the inverse stiffness matrix and these terms are used to calculate the internal stiffness. In the second method, three independent inspection loadings are applied to each point. In this operation, the multi-displacement condition is converted into the multi-loading condition. An actual structure is calculated using this second method ; the decrease rate in calculation time is over 90 percent.
社団法人日本機械学会の論文
2007-09-25