含泥沙的流固层状介质界面波传播特性研究
Research on the characteristics of fluid-solid interface wave propagation in layered sediment medium

在弹性波传播理论的基础上,结合边界条件,导出了流固层状介质导波特征方程,计算特征方程的频散曲线;然后结合Urick、Urick-Ament和Harker-Temple这三种悬浊液模型,计算流体层中的泥沙含量和颗粒粒径与界面波波速的关系;分析比较不同模型下泥沙含量及颗粒粒径与波速的关系图,讨论不同参数对波速的影响,得出了三种模型下波速随泥沙含量和颗粒粒径的变化趋势,最后发现Urick-Ament模型同时适用于检测悬浊液的泥沙含量和泥沙颗粒粒径,且在三种模型中有相对较好的可靠性和实用性。
Based on the theory of elastic wave propagation and boundary conditions, the characteristic equation of fluid-solid interface waves propagation in layered sediment medium is derived; three suspended fluid models of Urick, Urick-Ament and Harker-Temple are used to investigate the relations between velocity and sediment concentration as well as particle size. By the discussion of the impact of different parameters on the velocity, the velocity variation trends under three models with the change of sediment concentration and particle size are obtained. As a result, it is found that Urick-Ament model is more applicable to the detection of sediment concentration and sediment suspension particle size for the fluid-solid interface wave.