Identification de la relation de dispersion dans les barresIdentification of the dispersion relation in rods |
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| Authors: | Ramzi Othman, Robert H. Blanc, Marie-Noë lle Bussac, Pierre Collet,G rard Gary |
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| Affiliation: | a Laboratoire de mécanique des solides, UMR 7649, École polytechnique, 91128, Palaiseau, France;b Trans.Waves, 150, cité Le Corbusier, 13008, Marseille, France;c Centre de physique théorique, UMR 7644, École polytechnique, 91128, Palaiseau, France |
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| Abstract: | Dispersion and attenuation of longitudinal waves in elastic or weakly viscoelastic rods are measured by analysing the resonant frequencies present in the strain spectrum due to an unknown loading. The method takes the finite measuring time of the test into account. It is applied to an aluminium bar, in which the dispersion relation is identified very accurately at frequencies up to 60 kHz. To cite this article: R. Othman et al., C. R. Mecanique 330 (2002) 849–855. |
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| Keywords: | Mots-clé: ondes relation de dispersion module d'Young complexe barres de Hopkinson dynamique traitement du signalMots-clé: waves dispersion relation complex Young's modulus Hopkinson bar dynamics signal processing |
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