Very large amplitude vibrations of flexible structures : experimental identification and validation of a quadratic drag damping model Article - Août 2020

Mathieu Colin, Olivier Thomas, Sébastien Grondel, Eric Cattan

Mathieu Colin, Olivier Thomas, Sébastien Grondel, Eric Cattan, « Very large amplitude vibrations of flexible structures : experimental identification and validation of a quadratic drag damping model  », Journal of Fluids and Structures, août 2020, p. 103056. ISSN 0889-9746

Abstract

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.

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