境界質量と境界剛性を用いた大形衛星搭載用アンテナの分割試験(機械力学,計測,自動制御)

概要

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The purpose of this paper is to predict accurate frequencies of large space structures from the results of component modal tests. We deal with structures such as large satellite antennas, which are difficult to perform modal tests on whole structure. A method, considering the effect of untested components as boundary mass and stiffness, is proposed for obtaining accurate frequencies of a structure. Boundary mass and stiffness are found by reducing mass and stiffness matrices to boundary degrees of freedom. A tested component with these reduced matrices at the boundary gives accurate frequencies of whole structures. In performing modal tests, it is important how to simulate these matrices as boundary mass and stiffness. A procedure to find boundary mass and stiffness is shown and a numerical example is given to show that the proposed method is effective for predicting accurate frequencies of whole structures.
一般社団法人日本機械学会の論文
2005-06-25