饱和多孔介质中热弹性波传播特性研究  

Propagation of Thermo-elastic Wave in Saturated Porous Media

作　　者：刘干斌[1] 郑荣跃[1] 陶海冰[2] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]浙江大学岩土工程研究所,杭州310027

出　　处：《地下空间与工程学报》2016年第4期926-931,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(51278256;51178227)

摘　　要：在饱和多孔介质热流固耦合动力响应模型基础上,建立了饱和多孔介质热流固耦合热弹性波动理论,研究了热物性参数对波的传播特性的影响。通过引入势函数,推导了饱和多孔介质体中热弹性波的弥散方程,重点分析了热膨胀系数对p1、p2、T和S波的波速的影响,结果表明:热膨胀系数对p1和p2的影响较大,热流固耦合效应不可忽视。与饱和多孔介质中弹性波的传播特性对比分析验证了本文结果的正确性。Based on the dynamic response model presented by the author for saturated medium with thermal,hydraulic and mechanical coupling,a thermo-hydro-mechanical coupled theory of thermo-elastic wave for the saturated porous mediumis established in this paper. By introducing a potential function and using the displacement vector,the dispersion equation for the thermo-elastic wave in saturated soil is derived,the characteristics of wave velocity,attenuation for p1,p2,T and S wave are discussed under different values of thermal expansion coefficient. The result indicated that the influence of thermal expansion coefficient on p1 and p2was large,and the thermo-hydro-mechanical coupling effect could not be ignored. Other comparison results between thermo- elasticity theory（ THM） and the theory of elasticity（ HM） verify the validity of THM theory of wave presented in this paper.

关 键 词：多孔介质 热弹性波 波速 特征衰减 

分 类 号：TU94[建筑科学—建筑技术科学] U213[交通运输工程—道路与铁道工程]