Han Qingbang, Qi Lihua, Shan Minglei, Yin Cheng, Jiang Xueping, Zhu Changping
College of IOT Engineering, Ho Hai University, Chang Zhou, China.
College of IOT Engineering, Ho Hai University, Chang Zhou, China.
Ultrasonics. 2017 Nov;81:73-80. doi: 10.1016/j.ultras.2017.03.020. Epub 2017 May 19.
Based on the modified Biot theory of Johnson, the propagation characteristics of the various interface waves at an interface between a semi-infinite fluid and a porous medium were studied. First, based on the characteristic equations of open-pore and sealed-pore, which were derived from the wave equations, time-domain waveforms at the interface were obtained by inverse Fourier transform. The effects of the longitudinal frame modulus on the interface waves were investigated. For open-pore and sealed-pore, the effect of porosity on the propagation of the interface waves was studied; the porosity was found to strongly influence the true surface wave. Based on four ultrasonic suspension models-Utrick, Utrick-Ament (UA), Harker-Temple (HT) and McClement, the pseudo-Stoneley wave propagation characteristics were analyzed at the interface between the sediment-containing two-phase fluid and the porous medium solid. The effects of volume fraction and particle diameter on the phase velocity, attenuation coefficient and dispersion for the pseudo-Stoneley and true surface wave were discussed, and the results demonstrated that the properties of the fluid strongly impacted the pseudo-Stoneley wave but exerted very little effect on the true surface wave. The conclusions drawn in this paper could contribute to elucidate the parameters of sediment and porous media.
基于约翰逊修正的毕奥理论，研究了半无限流体与多孔介质界面处各种界面波的传播特性。首先，根据从波动方程导出的开孔和封孔特征方程，通过傅里叶逆变换得到界面处的时域波形。研究了纵向框架模量对界面波的影响。对于开孔和封孔，研究了孔隙率对界面波传播的影响；发现孔隙率对真表面波有强烈影响。基于四种超声悬浮模型——乌特里克模型、乌特里克 - 阿门特（UA）模型、哈克 - 坦普尔（HT）模型和麦克莱门特模型，分析了含沉积物的两相流体与多孔介质固体界面处的伪斯通利波传播特性。讨论了体积分数和粒径对伪斯通利波和真表面波的相速度、衰减系数和频散的影响，结果表明流体性质对伪斯通利波有强烈影响，但对真表面波影响很小。本文得出的结论有助于阐明沉积物和多孔介质的参数。
