Influence of sedimentary layering on tsunami generation

Abstract : The present article is devoted to the influence of sediment layers on the process of tsunami generation. The main scope here is to demonstrate and especially quantify the effect of sedimentation on vertical displacements of the seabed due to an underwater earthquake. The fault is modelled as a Volterra-type dislocation in an elastic half-space. The elastodynamics equations are integrated with a finite element method. A comparison between two cases is performed. The first one corresponds to the classical situation of an elastic homogeneous and isotropic half-space, which is traditionally used for the generation of tsunamis. The second test case takes into account the presence of a sediment layer separating the oceanic column from the hard rock. Some important differences are revealed. We conjecture that deformations in the generation region may be amplified by sedimentary deposits, at least for some parameter values. The mechanism of amplification is studied through careful numerical simulations.
Liste complète des métadonnées

Littérature citée [10 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-00288696
Contributeur : Denys Dutykh <>
Soumis le : jeudi 16 juillet 2009 - 09:43:49
Dernière modification le : jeudi 9 février 2017 - 15:27:36
Document(s) archivé(s) le : jeudi 23 septembre 2010 - 17:30:50

Fichiers

DutykhDias_sediments_revised.p...
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Denys Dutykh, Frédéric Dias. Influence of sedimentary layering on tsunami generation. Computer Methods in Applied Mechanics and Engineering, Elsevier, 2010, 199 (21-22), pp.1268-1275. 〈10.1016/j.cma.2009.07.011〉. 〈hal-00288696v3〉

Partager

Métriques

Consultations de la notice

278

Téléchargements de fichiers

142