Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 97, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2020.103056
Keywords
Nonlinear damping; Large amplitude vibrations; Parametric system identification
Categories
Funding
- Direction Generale de l'Armement
- Region Hauts-de-France
- Agence Nationale de la Recherche
- ASTRID [ANR-19-ASTR-0023-01]
- Agence Nationale de la Recherche (ANR) [ANR-19-ASTR-0023] Funding Source: Agence Nationale de la Recherche (ANR)
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This article presents a theoretical, numerical and experimental study of resonant structures undergoing very large amplitude vibrations. The purpose of this work is to validate a model for the damping due to the action of the air on a structure's single-mode response in the steady-state. Experiments are performed on cantilever beams and beam assemblies of various sizes, from centimetric to micrometric, under harmonic base excitation. Dimensionless linear and nonlinear modal damping coefficients are simultaneously identified by means of frequency-domain identification techniques. These measurements demonstrate the pertinence of the presented model. (c) 2020 Elsevier Ltd. All rights reserved.
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