323 一意性を考慮したシステム同定法(モード解析と応用関連技術2)(OS.16 : モード解析と応用関連技術)

概要

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This paper deals with the uniqueness of identified mass and stiffness matrices in system identification. Using the constrained minimization theory, these matrices are so identified as to minimize the Euclidean norm of the matrices. Current identification methods with constraints on the modal masses can never give a unique mass matrix because mode shapes are relative ratio of amplitude at points on structures. This paper proposes the measured mass properties of a structure and mode orthogonality are introduced into the constraints to solve this problem. The proposed method is applied to a cantilever beam. Numerical results show that the proposed method gives unique mass and stiffness matrices.
一般社団法人日本機械学会の論文
2001-08-03