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《Progress In Geophysics》 2004-03
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The analysis of the wave field characteristics in 2-D viscoelastic random medium

XI Xian ~(1, 2), YAO Yao ~(2)(1. Huazhong University of Science & Technology, mathematics Department, Wuhan 430074,China;2. China University of Geosciences, Geophysics Department, Wuhan 430074,China )  
Trough the staggered-mesh finite difference simulations of the wave equations, simulated the propagation of the seismic wave and the relevant zero offset time record in the 2D viscoelastic random medium models. To study the wave field characteristics of 2-D viscoelastic random medium, we divide up the theoretic recording sections (vertical component) into two different time sectors, and separately calculated and extracted the three statistical characteristics (Horizontal center frequency, vertical center frequency and relative magnitude of the wave field energy) in the two different time sectors. In this way, corresponding to every single viscoelastic random medium model, we can calculate and gained 6 different wave field characteristic quantities. Via the forward modeling in the 2-D viscoelastic random medium, we studied the change features of the wave field characteristic quantities as changing the media's autocorrelation length and the viscoelastic absorb coefficient, and gained several conclusions finally.
【CateGory Index】: P631
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