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Distinction between harmonic and structural components in ambient excitation tests using the time–frequency domain decomposition technique

Abstract : The time-frequency domain decomposition technique has been proposed for modal identification in ambient vibration testing. In the presence of harmonic excitations, the modal identification process can provide not only structural modes but also non-structural ones relative to harmonic components. It is thus important to distinguish between them. In this study, by using the time-frequency domain decomposition technique, it is demonstrated that the distinction between non-structural harmonic components and those of the structural responses can be possible, and it is merged into the general procedure of the time-frequency domain decomposition method. This proposition is then verified by numerical examples and by a laboratory test.
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https://hal-enpc.archives-ouvertes.fr/hal-01143886
Contributeur : Bachar Kabalan <>
Soumis le : lundi 20 avril 2015 - 14:30:15
Dernière modification le : vendredi 17 juillet 2020 - 17:08:38

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Thien-Phu Le, Pierre Argoul. Distinction between harmonic and structural components in ambient excitation tests using the time–frequency domain decomposition technique. Mechanical Systems and Signal Processing, Elsevier, 2015, 52-53 (1), pp.29-45. ⟨10.1016/j.ymssp.2014.07.008⟩. ⟨hal-01143886⟩

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