多点加振機による構造物のモード解析 : 第1報, 加振幾の駆動信号を用いた周波数応答関数の推定法

概要

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This paper discusses a methodology for estimating frequency response functions of structures. Firstly, causes of random errors associated with the frequency response function estimates are analyzed. Secondly, a method for improving the accuracy of the estimates is proposed. Finally, that technique is verified experimentally by multiple input testing for an actual structure. Consequently, the following results are obtained. A linear dependence between the input forces at the natural frequencies of the test structure increases the confidence intervals of the estimates. However, that estimating problem is improved by the proposed method in which the drive signals for exciters are considered to be the inputs for the testing system and both of the exciting forces and the response displacements are considered to be the outputs of the testing system.
一般社団法人日本機械学会の論文
1990-03-25