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Effect of flow-independent viscosity on the propagation of Rayleigh wave in porous media

被引：0
|
作者：
Chen, Weiyun [1 ,2 ]
Wang, Dan [2 ]
Mou, Yumin [3 ]
Zhao, Kai [2 ]
Chen, Guoxing [2 ]
机构：
[1] School of Civil Engineering, Sun Yat-Sen University, Guangzhou,510275, China
[2] Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing,210009, China
[3] China Design Group Co., Ltd., Nanjing,210001, China
来源：
Soil Dynamics and Earthquake Engineering | 2021年 / 142卷
基金：
中国国家自然科学基金;
关键词：
Viscosity - Geometry - Pore fluids - Viscoelasticity - Porous materials - Dispersion (waves);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The propagation characteristics of Rayleigh wave near the surface of fluid-saturated poroviscoelastic medium are investigated in this paper. The effective stress in porous media is defined by the linear viscoelasticity theory based on Biot model and Kelvin-Voigt model. The dispersion equations of Rayleigh wave are derived analytically and then solved numerically to obtain its propagation speed and attenuation coefficient in the poroviscoelastic solid half-space. The effects of relaxation time and viscous coupling on the dispersion and attenuation of the Rayleigh wave as well as the body waves are discussed. The results indicate that the flow-independent viscosity has important influence on the propagation characteristics of Rayleigh waves, compared with the flow-dependent effect of viscous coupling between the pore fluid and solid skeleton. © 2020 Elsevier Ltd
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