振動モードを考慮した要素行列のグループ化によるシステム同定(機械力学,計測,自動制御)

概要

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This paper proposes a method to identify mass and stiffness matrices of structures. The mass and stiffness matrices of finite-elements have mass and stiffness distributions. Therefore, the proposed method identifies mass and stiffness matrices to improve the mass and stiffness distributions of the original model to approach those of the real structures. The mass and stiffness matrices of finite-elements are divided into several groups considering vibration modes of structures. A group is represented by a sparse matrix (grouped matrix) with non-zero values at only degrees of freedom in the group. Mass and stiffness matrices are modified group by group. The objective function to be minimized is the sum of each norm of difference between analytical and identified group matrices. A numerical example is given to show the effectiveness of the method.
一般社団法人日本機械学会の論文
2007-10-25