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Finite element analysis of quasi-static earthquake displacement fields observed by GPS
Abstract In order to investigate the ability of numerical techniques in computing seismic displacement fields, a forward problem of dislocation theory is first solved by both analytical and numerical techniques. Convergency of the numerical solution and a comparison with the results of a well-known analytical solution are presented for a particular problem. The results are then used when the numerical technique is applied to the same problem without any information on the dislocation source. The latter results may be applied in an inverse dislocation problem. Numerical techniques are in particular expected to be flexible enough to (1) include internal discontinuities, (2) apply geodetic observations as boundary conditions and (3) model lateral, in addition to radial, material heterogeneities. A model with lateral variation of elastic parameters is considered in the last problem.
Finite element analysis of quasi-static earthquake displacement fields observed by GPS
Abstract In order to investigate the ability of numerical techniques in computing seismic displacement fields, a forward problem of dislocation theory is first solved by both analytical and numerical techniques. Convergency of the numerical solution and a comparison with the results of a well-known analytical solution are presented for a particular problem. The results are then used when the numerical technique is applied to the same problem without any information on the dislocation source. The latter results may be applied in an inverse dislocation problem. Numerical techniques are in particular expected to be flexible enough to (1) include internal discontinuities, (2) apply geodetic observations as boundary conditions and (3) model lateral, in addition to radial, material heterogeneities. A model with lateral variation of elastic parameters is considered in the last problem.
Finite element analysis of quasi-static earthquake displacement fields observed by GPS
Abolghasem, A. M. (Autor:in) / Grafarend, E. W. (Autor:in)
Journal of Geodesy ; 77
2003
Aufsatz (Zeitschrift)
Englisch
BKL:
38.73
Geodäsie
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