ウェーブレット逆変換による模擬地震動の作成
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概要
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Non-stationary behaviors of inelastic structures during an earthquake are influenced by the characteristics of ground motions in frequency domain as well as in time domain. Wavelet transformation seems to be a powerful tool to translate time-sequence data into spectral information in a frequency-time plane. Thus, the application of wavelet inverse transformation may be feasible to make pseudo-earthquake motions having particular properties designated in both domains of frequency and time. In this paper, pseudo earthquake waves are generated on the condition that Fourier amplitude spectrum, energy input rate and occurrence time of predominant wave are given. It was found that these three parameters can be well controlled in the simulated waves by wavelet inverse transformation.
- 1997-12-30
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