含孔隙分层半空间中瑞利波的传播特性研究

为了研究含孔隙介质分层半空间中瑞利波的传播规律,分析孔隙介质参数对瑞利波频散曲线的影响,本文进行了数值模拟研究。采用传递矩阵算法,计算了含孔隙分层半空间中一定频率范围内瑞利波所有模式的频散及激发强度曲线,并与均匀弹性固体分层半空间情况作了类比分析,在含孔隙覆盖层的两层模型和含低速孔隙夹层的三层模型下,详细研究了孔隙度、渗透率、层厚度等参数对瑞利波各模式的影响,发现孔隙度及层厚度的变化对频散曲线影响较大,而渗透率的变化对频散曲线影响较小。 

Study on the propagation characteristics of Rayleigh wave in multi-layered media with porous medium layer

The numerical simulation has been studied in order to research on the propagation of Rayleigh wave in stratified half-space media with a porous layer,and analyze the effect of the parameters of porous media on the dispersion of Rayleigh wave.By the transfer matrix method,we calculate the dispersion and excitation curves of all modes of the Rayleigh waves of the given frequency range,the results are contrasted and analyzed to that in stratified elastic solid half-space. The effect of porosity,permeability,layer's thickness and other parameters on the Rayleigh waves is investigated in both two models,which are two and three layers half-spaces respectively,It is found that the dispersion curve changes obviously when the porosity of the media or the layer thickness changes,on the contrary,it is hard to see the difference of dispersion curve when the permeability of the media changes.