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研究浅层土壤中声波耦合的地震波的传播特性,用于声波探雷技术的机理分析.根据浅层土壤具有孔隙度和可压缩性的特点,利用非饱和三相孔隙介质中的地震波模型,研究了土壤孔隙度、含水饱和度等参数对地震波传播特性的影响.计算结果显示:在给定的参数条件下,地震波的传播速度和衰减系数均随频率的增加而增加;纵波的传播速度随孔隙度的增加而减小,横波的传播速度随孔隙度的增加而增加;地震波的传播特性随含水饱和度的增加变化比较复杂.通过对计算结果与已发表实验结果的比较分析,讨论了解析方法的可行性,为声-地震耦合机理及其在声波探雷研究中的应用提供了一定的理论基础.
Based on the characteristics of shallow soil with porosity and compressibility, the seismic wave model in unsaturated three-phase porous media is used to study the propagation characteristics of acoustic wave coupling in shallow soil for the mechanism analysis of sounding mine detection technology. The effects of soil porosity, water saturation and other parameters on the propagation characteristics of seismic wave are studied. The calculated results show that the propagation velocity and attenuation coefficient of seismic wave increase with the increase of frequency under the given parameters. The propagation velocity of P- The propagation velocity of transverse waves increases with the increase of porosity.The propagation characteristics of seismic waves change more complicated with the increase of water saturation.Through the comparative analysis between the calculated results and the published experimental results, The feasibility of this method provides a theoretical basis for the acousto-seismic coupling mechanism and its application in sounding mine detection.