324 構造物の回転自由度に関する周波数応答関数の推定 : ランダム誤差を考慮した推定法の提案とその精度評価(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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Experimental modal analysis is a basic technology of vibration testing. FRF measurement on Rotational degrees of freedom (DOFs) has been disregarded in experimental modal analysis. Rotational FRFs are vital to extend the availability of experimental modal analysis. The authors have proposed an estimation method of rotational FRFs of structures. It is necessary to evaluate the accuracy of estimated rotational FRFs. In this paper an improved method for the estimation and the estimation method and the evaluation of the accuracy are presented. In order to consider the a propagation of random noise in FRF measurement the variance of rotational FRFs are derived. The coherence of estimated FRFs are also calculated from variance. The feasibility of the noise evaluation approach is investigated with an experimental model and a finite element model.
一般社団法人日本機械学会の論文
2001-08-03