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《Progress In Geophysics》 2005-02
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Random cavity medium model and the wave field simulation

XI Xian1, YAO Yao2, GU Han-ming2 (1. China University of Geosciences, mathematics and physics Department, Wuhan 430074, China 2. China University of Geosciences, Geophysics Department, Wuhan 430074, China)  
This paper brings forward a kind of new simulation method of the random cavity medium model. Starting from the existing theory of the random medium model, and taking every local maximum point of a mixed type continuous random medium as the center point of each cavity distribution area, this paper introduces the two model characteristic quantities namely the local radius d and the cavity area p, and simulated all sorts of different random cavity medium models by the method of the valve value intercepting. Using the local radius d to describe the dispersion degree of the random cavity medium on large scale and using the cavity area p to describe the area of the cavity medium in each cavity distribution area. Via choosing to get going from each different mixed type continuous random medium model, and choosing each different local radius d and the local density p, we could generate a great variety of the different cavity media, and gains each random cavity medium model that is capable of describing the practical complex cavity medium smartly and accurately. In the end this paper simulats the zero-offset-time-records of the elastic plan wave numerically in the each different random cavity medium, and gains some conclusions.
【Fund】: 国家自然科学基金项目(40174034);; 国家自然科学基金项目(40274038)联合资助.
【CateGory Index】: P631.4
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