Comptes Rendus
Continuum modeling for the modulated vibration modes of large repetitive structures
[Modèle continu pour les modes de vibrations modulés des longues structures répétitives]
Comptes Rendus. Mécanique, Volume 330 (2002) no. 5, pp. 333-338.

Grâce à la théorie de l'homogénéisation, on peut prédire les basses fréquences de vibrations des structures longues et répétitives. Pour des fréquences moyennes, beaucoup de modes ont une forme modulée. Nous présentons ici un modèle continu qui permet de prendre en compte cette classe de modes, grâce à la méthode des échelles multiples. Ce modèle dépend d'un paramètre réel qu'on peut calculer en résolvant par éléments finis des problèmes définis sur quelques cellules de base. Une application est présentée dans le cas de l'élasticité 2D.

By homogenization theory, one can predict the vibrations of long repetitive structures in the low frequency range. Beyond this range, many modes have a modulated shape. Based on a multiple scale analysis, a continuum model is presented, that is able to account for this class of modes. This model involves a real coefficient that can be computed from the finite element resolution of problems defined on a few basic cells. An application in 2D elasticity is presented.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/S1631-0721(02)01464-X
Keywords: computational solid mechanics, solids and structures
Mots-clés : mécanique des solides numérique, solides et structures

El Mostafa Daya 1 ; Bouazza Braikat 2 ; Noureddine Damil 2 ; Michel Potier-Ferry 1

1 Laboratoire de physique et mécanique des matériaux, UMR CNRS 7554, Université de Metz, ISGMP, Ile du Saulcy, 57045 Metz cedex 01, France
2 Laboratoire de calcul scientifique en mécanique, Faculté des sciences Ben M'Sik, Université Hassan II – Mohammedia, Casablanca, Maroc
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El Mostafa Daya; Bouazza Braikat; Noureddine Damil; Michel Potier-Ferry. Continuum modeling for the modulated vibration modes of large repetitive structures. Comptes Rendus. Mécanique, Volume 330 (2002) no. 5, pp. 333-338. doi : 10.1016/S1631-0721(02)01464-X. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(02)01464-X/

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