大形宇宙構造物のコンポーネントモーダル試験における境界質量と境界剛性(S65-1 宇宙構造・材料,S65 宇宙構造物)

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 arid 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
2004-09-04