Reflection characteristics of plane-S-wave at the free boundary of unsaturated porothermoelastic media

doi:10.1080/01495739.2019.1711478

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Reflection characteristics of plane-S-wave at the free boundary of unsaturated porothermoelastic media
	Zhou, Fengxi 1,2; Zhang, Ruiling 1; Liu, Hongbo 1; Yue, Guodong 1
刊名	Journal of Thermal Stresses
	2020-05-03
卷号	43 期号:5 页码:579-593
关键词	Elasticity Heat flux Porous materials Reflection Seismic prospecting Shear waves Thermal conductivity Thermal expansion Thermoelasticity Generalized thermo-elasticity Reflected waves Reflection characteristics S-waves Theory of porous medias Thermal expansion coefficients Thermo-physical parameters Unsaturated porous medium
ISSN号	01495739
DOI	10.1080/01495739.2019.1711478
英文摘要	In the present work, the reflection of plane-S-wave at the free boundary of an unsaturated porothermoelastic medium is studied taking into consideration of the theory of porous media and the generalized thermoelasticity model. Based on the wave equations for an unsaturated porous medium considering thermo-fluid-solid coupling and the boundary conditions, the theoretical expressions of the reflection coefficient of five kinds of reflected waves at the free boundary of the unsaturated porothermoelastic medium, i.e., reflected P1 wave, reflected P2 wave, reflected P3 wave, reflected S wave and reflected thermal wave, are derived by using the classical Helmholtz potential function decomposition method. Then the numerical calculations are used to discuss the variation of the reflection coefficients of each reflected wave with the incident angle of plane-S-wave and the thermophysical parameters such as saturation, thermal expansion coefficient, thermal conductivity, medium temperature and phase-lag of heat flux and gradient of temperature. The results show that the reflection coefficient of each reflected wave is affected by not only the incident angle but also the saturation. The change of thermal expansion coefficient has a significant influence on the reflection coefficient of each reflected wave. The change of medium temperature only affects the reflection coefficient of the reflected P2 wave, reflected P3 wave and reflected thermal wave. The change of thermal conductivity, phase-lag of heat flux and phase-lag of gradient of temperature only has a large effect on the reflection coefficient of reflected thermal wave. These conclusions are helpful in the theoretical research and seismic exploration projects. © 2020, © 2020 Taylor & Francis Group, LLC.
WOS研究方向	Thermodynamics ; Mechanics
语种	英语
出版者	Taylor and Francis Ltd.
WOS记录号	WOS:000509318700001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150662]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China; 2.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Zhou, Fengxi,Zhang, Ruiling,Liu, Hongbo,et al. Reflection characteristics of plane-S-wave at the free boundary of unsaturated porothermoelastic media[J]. Journal of Thermal Stresses,2020,43(5):579-593.
APA	Zhou, Fengxi,Zhang, Ruiling,Liu, Hongbo,&Yue, Guodong.(2020).Reflection characteristics of plane-S-wave at the free boundary of unsaturated porothermoelastic media.Journal of Thermal Stresses,43(5),579-593.
MLA	Zhou, Fengxi,et al."Reflection characteristics of plane-S-wave at the free boundary of unsaturated porothermoelastic media".Journal of Thermal Stresses 43.5(2020):579-593.