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| HAL : hal-00677313, version 1 |
| DOI : 10.1080/17455030.2011.613418 |
| Fiche détaillée |  Récupérer au format |
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| Waves in Random and Complex Media 21, 4 (2011) 628-644 |
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| Mean-field T-matrix approach to elastic wave scattering by small and point-like objects |
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| Ludovic Margerin 1 |
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| (2011) |
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| The T-matrix of a small inclusion embedded in a homogeneous matrix is calculated for vector elastic waves. The theory relies on an approximation of the local stress and momentum inside the inclusion by volumetric averages, which allows the summation of the full multiple-scattering series. The limiting case of a point scatterer is discussed. The mean-field T-matrix and its point limit both satisfy the elastodynamic version of the optical theorem. The accuracy of the results is discussed by comparison with some exact solutions for spheres. In particular, the mean-field T-matrix allows the approximate modeling of low-frequency resonances by small, high-contrast objects. The present theory could be applied to the multiple scattering of elastic waves by a collection of small or fuzzy resonant scatterers. |
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| 1 : | Institut de recherche en astrophysique et planétologie (IRAP) |
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CNRS : UMR5277 – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées |
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| Domaine | : | Physique/Mécanique/Acoustique Sciences de l'ingénieur/Acoustique Planète et Univers/Sciences de la Terre |
| hal-00677313, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00677313 | |
| oai:hal.archives-ouvertes.fr:hal-00677313 | |
| Contributeur : Eric LAROSE | |
| Soumis le : Mercredi 7 Mars 2012, 22:56:57 | |
| Dernière modification le : Mercredi 7 Mars 2012, 22:56:57 | |
