Finite-element modeling of continuous surface waves tests / A. M. W. Aung in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 12 (Décembre 2011)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1294-1298 Titre : Finite-element modeling of continuous surface waves tests : Numerical accuracy with respect to domain size Type de document : texte imprimé Auteurs : A. M. W. Aung, Auteur ; Leong, E. C., Auteur Année de publication : 2012 Article en page(s) : pp. 1294-1298 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Finite-element method Continuous surface waves Dispersion curve Near-field effects Semi-infinite domain Nonreflecting boundary Résumé : Near-field effects are inherent in continuous surface wave (CSW) tests. Such effects on the dispersion curves can be studied using the finite-element (FE) method. However, near-field effects may be obscured by boundary effects in a FE model. Although the use of local nonreflecting boundary conditions (NRBCs) may alleviate the problem, these need to be placed sufficiently far away to be effective. Quantitative guidelines on domain size with NRBCs are still lacking. This paper provides specific guidelines to determine the domain size in terms of the wavelength-to-domain size ratio, λ*/l*. With local NRBCs, numerical errors were found to be negligible when the domain size (l*) was extended to twice the longest wavelength (λ*). However, in modeling soft soil deposits in which shear-wave velocity (Vs) is less than 100  m/s, a smaller domain size (e.g., λ*/l* = 2) is sufficient. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1294_s1?isAuthorized=no [article] Finite-element modeling of continuous surface waves tests : Numerical accuracy with respect to domain size [texte imprimé] / A. M. W. Aung, Auteur ; Leong, E. C., Auteur . - 2012 . - pp. 1294-1298. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1294-1298 Mots-clés : Finite-element method Continuous surface waves Dispersion curve Near-field effects Semi-infinite domain Nonreflecting boundary Résumé : Near-field effects are inherent in continuous surface wave (CSW) tests. Such effects on the dispersion curves can be studied using the finite-element (FE) method. However, near-field effects may be obscured by boundary effects in a FE model. Although the use of local nonreflecting boundary conditions (NRBCs) may alleviate the problem, these need to be placed sufficiently far away to be effective. Quantitative guidelines on domain size with NRBCs are still lacking. This paper provides specific guidelines to determine the domain size in terms of the wavelength-to-domain size ratio, λ*/l*. With local NRBCs, numerical errors were found to be negligible when the domain size (l*) was extended to twice the longest wavelength (λ*). However, in modeling soft soil deposits in which shear-wave velocity (Vs) is less than 100  m/s, a smaller domain size (e.g., λ*/l* = 2) is sufficient. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1294_s1?isAuthorized=no

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