加振実験に基づく構造物のモデリング : 第1報,時間窓に起因する周波数応答関数推定誤差の回避方法

概要

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This paper is intended as an investigation of frequency response function (FRF) estimates for structural dynamics modeling. First, a new method for reducing errors caused by window effects concerning FRF estimates is proposed. The main feature of the method is that both the input force sample function and the output response one, which are obtained as finite-length time functions, are converted to periodic sequence functions before discrete Fourier transform of those functions is performed. Secondly, advantages of the method are demonstrated through the use of simulated FRF estimates. In conclusion, (1) no window effects appeared with the use of the proposed method; (2) the method can be applied to various types of excitation, e.g., random or impact.
一般社団法人日本機械学会の論文
1994-01-25