239 大規模非線形系に対する高性能振動解析手法の開発 : 非比例減衰系への適用

概要

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A rational method of dimensional reduction is developed in order to analyze accurately a nonlinear vibration of a large-scale system with locally strong nonlinearity. Nodes without nonlinear excitation are transformed into the modal coordinates and the only modes whose effect on computation accuracy of the vibration analysis is significant are extracted. On the other hand, the remaining modes whose effect on computation accuracy is small are appropriately approximated and are eliminated. The low-dimensional model is constructed by these procedures. The effectiveness of this method for a straight-line beam structure acting non-proportionally damping is verified by the computational results.
一般社団法人日本機械学会の論文
2009-08-03