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随着声学技术的快速发展,界面波在无损检测及环境参数反演领域的应用越来越广泛,但是目前理论与实践之间还存在一些差距,首先对基于Biot理论的流体饱和多孔介质声传播特性的理论进行了仿真分析,然后运用势函数结合多孔介质固体-流体边界条件建立了两半无限空间流-固界面Scholte波理论模型,最后对这一理论模型进行了实验验证。仿真结果表明:声波频率对各种波速几乎没有影响,但各种波速随孔隙度的变化较大;通过实验验证:Scholte波波速理论值与实际测量值之间的相对误差不超过0.24%。
With the rapid development of acoustic technology, the application of interface wave in nondestructive testing and environmental parameters inversion is more and more widespread. However, there is still some gap between the theory and practice. Firstly, the acoustic propagation of saturated porous media based on Biot theory Characteristics of the theory of the simulation analysis, and then the potential function combined with porous media solid - fluid boundary conditions established two half-infinite space flow - solid interface Scholte wave theoretical model, and finally this theoretical model was experimentally verified. The simulation results show that the acoustic frequency has almost no effect on various wave velocities, but the variation of various wave velocities varies greatly with the porosity. The experimental results show that the relative error between theoretical and actual values of Scholte wave velocities does not exceed 0.24%.