粘弹性介质中地震体波Q值的测定方法

THE MEASURED METHOD OF SEISMIC BODY Q VALUE IN THE VISCOELASTIC MEDIUM

摘要:

本文以常用的几种粘弹性体模拟地球介质的粘弹性,建立了该种介质中的波动方程组;在运用合理的近似处理方法基础上,得到了基本解;提出了校正其它衰减因素的功率谱切比雪夫拟合方法,由此给出了粘性Q值的概念和算法,最后讨论了该方法的可行性。

Abstract:

The equations of which the seismic waves are propagated in the viscoelastic medium have been built by imitating the viscosity properties of the earth with several ordinary viscoelastic bodies in this paper. The solutions of the problem have been obtained based on the proper approximate methods. It is given that the concept and the method which is used to estimate the viscocity Q value according to correct other factors causing the seismic waves energy decrease with Chebyshev polynomial approximate to power spectrum. At the end of this paper, the feasibility of the method has been is discussed.