地震動に含まれる位相特性のモデル化 [in Japanese] MODELING OF PHASE CHARACTERISTICS OF STRONG EARTHQUAKE MOTION [in Japanese]
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Modeling of phase charactristics of a seismic moion is an important subject tosynthsize a realistic seismic ground motion. We have developed simple methods toextract the essential phase characteristics of seismic motion. Deconvoluting aseismic motion into the minimum phase shift function and all-pass function, thephase spectra of both functions are calculated. Using smoothing technique the basiccharactristics of both phase spectras are investigated and a method reconstructingoriginal phase spectra is proposed based on the probabilistic consept. The cepsrumanalysis is also applied to deconvolute an obsered seisimic wave into a train ofimpulses and a system transfer function. Phase spectra of these functions aremodeled in a simple manner.
京都大学防災研究所年報 (32B-2), p1-10, 1989-04