首页 | 本学科首页   官方微博 | 高级检索  
     检索      

非饱和多孔介质中热-渗流-力学耦合的混合元法
引用本文:刘泽佳,李锡夔.非饱和多孔介质中热-渗流-力学耦合的混合元法[J].力学学报,2006,38(2):170-175.
作者姓名:刘泽佳  李锡夔
作者单位:广州华南理工大学交通学院
基金项目:国家自然科学基金项目(50278012,10272027,10590354)和国家973项目(2002CB412709)资助.
摘    要:提出了一个非饱和多孔介质中热-渗流-力学耦合分析的混合有限元 方法. 固相位移、应变和净应力;孔隙水和气的压力、压力空间梯度和Darcy速度;多相混 合介质的温度、温度空间梯度和热流量在单元内均为独立变量分别插值. 基于胡海 昌-Washizu 三变量广义变分原理给出的多孔介质中热-渗流-力学耦合问题控制方程的单元弱形式,导 出了单元公式. 采用共旋公式进行几何非线性分析. 数值结果证明了所提出的单元模拟以 应变局部化为特征的渐进破坏的能力

关 键 词:非饱和多孔介质  混合元  热-渗流-动力耦合分析  应变局部化  渐进破坏
文章编号:0459-1879(2006)02-0170-06
收稿时间:2005-04-07
修稿时间:2006-01-23

Mixed finite element method for coupled thermo-hydro-mechanical in unsaturated porous media
Liu Zejia,Li Xikui.Mixed finite element method for coupled thermo-hydro-mechanical in unsaturated porous media[J].chinese journal of theoretical and applied mechanics,2006,38(2):170-175.
Authors:Liu Zejia  Li Xikui
Institution:The State Key Laboratory for Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116024, China;College of Traffic and Communications, South China University of Technology, Guangzhou 510641, China
Abstract:A mixed finite element for coupled thermo-hydro-mechanical (THM) analysis in unsaturated porous media is proposed. Displacements, strains, the net stresses for the solid phase; pressures, pressure gradients, Darcy velocities for pore water and pore air phases; temperature, temperature gradients, the heat flux of the three phase mixture are interpolated as independent variables. The weak form of the governing equations of coupled thermo-hydro-mechanical problems in porous media within the element is established on the basis of the Hu-Washizu three-field variational principle.The proposed mixed finite element formulation is then derived. For geometrical non-linearity, the co-rotational formulation approach is used. Numerical results demonstrate the capability and the performance of the proposed element in modelling progressive failure characterized by strain localization.
Keywords:unsaturated porous medium  mixed finite element  coupled thermo-hydro-dynamic analysis  strain localization  progressive failure
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《力学学报》浏览原始摘要信息
点击此处可从《力学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号