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non-linéarité

Mechanics & Industry (1)

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Sur l'analyse modale expérimentale des structures non-linéaires
Imad Tawfiq, Tuong Vinh, Jean-Baptiste Casimir
Journal:

Mechanics & Industry / Volume 6 / Issue 1 / January 2005

Published online by Cambridge University Press:

08 March 2005, pp. 3-8

Print publication:

January 2005
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Sur le plan expérimental, l'analyse modale des structures non-linéaires est encore en butte à de nombreuses difficultés. Nous voulons montrer que l'utilisation exclusive de la transformée de Fourier unidimensionnelle ne permet pas d'obtenir les vraies fonctions de transfert nécessaires pour atteindre les fonctionnelles non-linéaires de Volterra. L'analyse jusqu'ici se cantonne dans la majorité des cas à l'obtention des valeurs propres de divers modes non-linéaires. Il est nécessaire d'obtenir par un moyen ou par un autre, les noyaux (ou réponses impulsionnelles) des fonctionnelles permettant d'évaluer les vecteurs propres correspondants. Nous utilisons la technique de multi-excitation pour déterminer les fonctionnelles non-linéaires.