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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。
In order to study the propagation law of Rayleigh wave in the layered half-space with pore media and analyze the influence of pore medium parameters on the Rayleigh wave dispersion curve, the numerical simulation is carried out in this paper. Using the transfer matrix algorithm, the dispersion and excitation intensity curves of all modes of Rayleigh wave in a certain frequency range are calculated and compared with the uniform elastic solid layered half-space, Layer two-layer model and a three-layer model with a low-velocity pore interlayer, the effects of porosity, permeability, layer thickness and other parameters on the Rayleigh wave modes are studied in detail. It is found that the variation of porosity and layer thickness has a significant influence on the dispersion curve The impact is larger, while the change of permeability has little effect on the dispersion curve.