摘要
基于各向异性多孔介质中的广义Ｂｉｏｔ理论，导出了横向各向同性多孔介质中波传播的特征方程．指出在多孔介质中有４种类型的频散和耗散波传播：准纵波ＱＰ１（快纵波）、准纵波ＱＰ２（慢纵波）、准横波ＱＳＶ和横渡ＳＨ．文中给出了４种波速度的解析表达式．数值计算频率曲线和衰减曲线与Ｓｃｈｍｉｔｔ（１９８９）用均值处理得到的结果类似．还给出了波传播过程中３种类型准体波之间的耦合系数（或称转换系数）．
Rased onthe generallzed Biot's theory in antisotroplc porous media the charac teristic equations of the seimic wave propagation in transversely isotropic porous media were derived.It is shown that in the porous media there are four kinds of dlspersive and attenuative waves (two quasi-longitudinal waves, one quasi-shear wave, and one pure shear wave).In this essay, the analytical velocity formulas for four kinds of waves were derived.The numerical calculated curves of dispersion and attenuation is similar to the result which Schmitt (1989) gave by homogenlzation theories. The coupling coefficients (or transform coefficients) among the kinds of seismic wave propagation are alsopresented.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第4期499-514,共16页
Chinese Journal of Geophysics
基金
国家自然科学基金
大庆石油管理局资助
关键词
波传播理论
地震波
多孔介质
Theory of wave propagation,Transversely isotactlclty, Porous media,Dispersion, Attenuation.
