掲載雑誌（和）： システム最適化に関するシンポジウム講演論文集 Vol： 1巻 年： 1989年 頁： 77-84頁 著者（和）： 安藤　幸治，岩楯　■広 タイトル（和）： 時間領域におけるモード解析を利用した地震波スペクトル解析手法について 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF THE SYMPOSIUM ON SYSTEM OPTIMIZATION 著者（英）： Koji ANDO,Takahiro IWATAKE タイトル（英）： A SPECTRAL ANALYSIS OF AN EARTHQUAKE RECORD USING THE MODEL ANALYSIS AN THE DOMAIN 抄録（英）：
This paper describes a new method of spactral analysis of an earthquake record. In general, this spectral analysis is treated by the Fourier transformation. But it is not easy to understand the dynamic property of ground from a Fourier Spectrum, because earthquake records contain so many influencing noises. In this paper, the theory is developed on the basis of assumption that the motion of the shearing wave is governed by the equation of motion. We shall proceed step by step, as follows. 1. By applying the so-called the model analysis in the time domain, we shall obtain the two model parameters, that is, the eigenvalue and the eigenvector. 2. Those model parameters will be synthesized so that the result will be a solution of the equation of motion. 3. The remaining parameters are used to determine the spectrum of an earthquake record. From the results by mean of these procedures, it is concluded that the present analysis is useful for a spectral analysis. One of results is exhibited in this paper. キーワード（英）： spectral analysis,modal analysis,least squares method,fourier transformation,model identification 記事区分： - 区分 　　　委員会論文集