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| HAL : hal-00288696, version 3 |
| arXiv : 0806.2929 |
| DOI : 10.1016/j.cma.2009.07.011 |
| Fiche détaillée |  Récupérer au format |
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| Computer Methods in Applied Mechanics and Engineering 199, 21-22 (2010) 1268-1275 |
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| Versions disponibles : | v1 (18-06-2008) | v2 (23-06-2008) | v3 (16-07-2009) |
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| Influence of sedimentary layering on tsunami generation |
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Denys Dutykh 1Frédéric Dias 2, 3 |
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| EU Project TRANSFER Collaboration(s) |
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| (01/04/2010) |
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| 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. |
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| 1 : | Laboratoire de Mathématiques (LAMA) |
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CNRS : UMR5127 – Université de Savoie |
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| 2 : | Centre de Mathématiques et de Leurs Applications (CMLA) |
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CNRS : UMR8536 – École normale supérieure de Cachan - ENS Cachan |
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| 3 : | Laboratoire de recheche conventionné MESO (LRC MESO) |
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CEA – CNRS : UMR8536 – École normale supérieure de Cachan - ENS Cachan |
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| Domaine | : | Physique/Mécanique/Mécanique des fluides Sciences de l'ingénieur/Mécanique/Mécanique des fluides Physique/Physique/Physique Atmosphérique et Océanique Physique/Physique/Géophysique Planète et Univers/Sciences de la Terre/Géophysique Sciences de l'environnement/Milieux et Changements globaux Physique/Physique/Physique Numérique Physique/Mécanique/Mécanique des solides Sciences de l'ingénieur/Mécanique/Mécanique des solides Mathématiques/Analyse numérique |
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| tsunami generation – dislocations – sediments – fault modelling |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00288696, version 3 | |
| http://hal.archives-ouvertes.fr/hal-00288696 | |
| oai:hal.archives-ouvertes.fr:hal-00288696 | |
| Contributeur : Denys Dutykh | |
| Soumis le : Jeudi 16 Juillet 2009, 09:43:49 | |
| Dernière modification le : Mardi 23 Novembre 2010, 21:33:29 | |
