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 2; Liu, Hongbo 2; Yue, Guodong 2
刊名	JOURNAL OF THERMAL STRESSES
	2020-01-17
卷号	43 期号:5 页码:579-593
关键词	Unsaturated porous medium thermoelasticity plane-S-wave reflected wave reflection coefficient thermophysical parameters
ISSN号	0149-5739
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 P-1 wave, reflected P-2 wave, reflected P-3 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 P-2 wave, reflected P-3 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.
资助项目	National Natural Science Foundation of China[51978320][11962016]
WOS研究方向	Thermodynamics ; Mechanics
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000509318700001
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/64306]
专题	土木工程学院
通讯作者	Liu, Hongbo
作者单位	1.Lanzhou Univ Technol, Minist Educ, Western Engn Res Ctr Disaster Mitigat Civil Engn, Lanzhou, Peoples R China 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R 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.