摘要:

AbstractCoupling and uncoupling between the equilibrium and mass balance equations in soil consolidation problems in investigated in detail. A procedure for judging the strength of coupling is indicated. In the applications, particular emphasis is given to subsidence problems where the coupled nature of the problem is still sometimes questioned. It is shown that even in the case of a single pumped aquifer most situations are coupled.

ISSN:0363-9061    

DOI:10.1002/nag.1610150803

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractWe consider the multigrid solution of a discretized singular integral equation whose solution represents the displacement discontinuity distribution across a pressurized crack or the slip on a fault subjected to a prescribed shear stress. The multigrid technique reduces the operation count for a crack model havingNdegrees of freedom fromO(N3) operations for standard stationary iterative methods toO(N2) operations. In the numerical simulations performed the multigrid approach proves to be extremely efficient even for small values ofN. We use Fourier analysis to determine the spectral properties of the coarse grid correction process and the effect of a number of different interpolation operators on the multigrid algorithm. We show that the multigrid technique can be combined with the process of lumping remote influences to yield an algorithm that involvesO(N) operations. The performance of multigrid iteration in a nonlinear environment is explored by considering seams filled with nonlinear material. For this purpose a segmented multigrid algorithm is developed that allows for different seam constitutive relations to be used along different line segments. TheO(N2) operation count characteristic of linear multigrid iteration is shown to persist in this nonlinear environment and the segmented multigrid approach is shown to provide significant computational savings for values ofNwell within the range for typical problems that occur in practice.

ISSN:0363-9061    

DOI:10.1002/nag.1610150804

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractAnalytical solutions of the long‐term consolidation deformation and excess pore water pressure due to fluid withdrawal from a saturated anisotropic porous elastic half space are presented. In the analysis, both the permeability and the elastic properties are considered cross‐anisotropic. Cases of pervious and impervious half‐space boundary are studied. The consolidation settlements as effected by the anisotropy and boundary conditions for pore water are illustrated and disc

ISSN:0363-9061    

DOI:10.1002/nag.1610150805

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractIn this paper a method is presented which helps to develop and to check constitutive laws by means of computer experiments. The exposition has been carried out along the formalism of hypoplasticity, which has been introduced as a generalization of hypoelasticity. Several results of computer experiments are graphically represented.

ISSN:0363-9061    

DOI:10.1002/nag.1610150806

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610150807

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610150802

出版商:John Wiley&Sons, Ltd    

年代:1991

数据来源: WILEY