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通过考察EDA介质中应力应变关系 ,建立了EDA介质中考虑非弹性效应的地震波动方程组 .其中 ,裂隙引起的非弹性效应体现在波动方程组中位移分量关于时间t的三次导数项上 .通过平面波位移函数解 ,研究了EDA介质中地震波速度、衰减与品质因子Q值的方位各向异性 ,并分别对干裂隙与饱含水裂隙两种情形下EDA介质中地震波速度、衰减与Q值随波频率与传播方向的变化关系进行了探讨 .研究结果说明 ,裂隙的存在以及裂隙内所含物质内容对地震波速度、衰减与Q值及其各向异性特别是两类qS波衰减或品质因子比值具有重要的影响 ;低频时 ,EDA弹性效应占主导地位 ;高频时非弹性效应愈加不可忽略 .
By investigating the relationship between stress and strain in EDA media, a set of seismic wave equations considering inelastic effects in EDA media is established, in which the inelastic effect caused by the fracture is expressed in the third derivative of the displacement component in the wave equation with respect to time t The azimuthal anisotropy of seismic wave velocity, attenuation and quality factor Q in EDA media was studied. The effects of seismic wave velocity, attenuation and Q value on the wave propagation and attenuation in EDA medium with dry fissures and water-saturated fissures were analyzed respectively. Frequency and propagation direction.The results show that the presence of fissures and the contents of the fissures have a significant impact on seismic velocity, attenuation and Q-value and their anisotropy, especially the attenuation or quality factor ratio of two types of qS waves Important effect; low frequency, EDA elastic effect dominates; ineffective at high frequency can not be ignored more.