摘要:

AbstractA number of variational principles are established in this paper for the stress analysis of porous media with compressible constituents. A three‐dimensional finite element method is proposed based on the variational principle. The finite element method thus established is applied to the study of the temperature, deformation and flow field associated with the water‐flood technique in secondary recovery projects for oil exploration. In the study model, the layout of injection wells and production wells is considered to have a regular pattern where symmetry conditions exist. The injection fluid diffuses slowly into the formation through a vertical crack which is initially generated by an explosion. The problem is analysed by a plane strain formulation with the effects of heat conduction and convection inclu

ISSN:0363-9061    

DOI:10.1002/nag.1610140102

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractA procedure for numerical approximation to two‐dimensional, hydraulically‐driven fracture propagation in a poroelastic material is described. The method uses a partitioned solution procedurè to solve a finite element approximation to problems described by the theory of poroelasticity, in conjunction with a finite difference approximation for modelling fluid flow along the fracture. An equilibrium fracture model based on a generalized, Dugdale–Barenblatt concept is used to determine the fracture dimensions. An important feature is that the fracture length is a natural product of the solution algorithm. Two example problems verify the accuracy of the numerical procedure and a third example illustrates a fully‐coupled simulation of fracture propagation. Photographs taken from a high‐performance engineering workstation provide insight into the nature of the coupling among the physical

ISSN:0363-9061    

DOI:10.1002/nag.1610140103

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractThe dynamic response of foundation is influenced by various mechanical properties of soil as well as the geometrical properties of the foundation. In this paper, the effects of Poisson's ratio and material damping, as well as the influences of aspect ratio and embedment depth on the dynamic stiffness of rectangular foundations are studied. Studies are also conducted to investigate the influence of the type of contact at the soil–foundation interface and the soil layer overlaying a half‐space. These studies were conducted using an advanced algorithm of the boundary element method incorporating isoparameteric quadratic boundary elements. Higher‐order elements (quadratic) were used since they can model the wavy nature of the dynamic problem accur

ISSN:0363-9061    

DOI:10.1002/nag.1610140104

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610140105

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610140101

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY