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research-article

Flutter control of a two-degrees-of-freedom airfoil using a nonlinear tuned vibration absorber

[+] Author and Article Information
Arnaud Malher

IMSIA (Institute of Mechanical Sciences and Industrial Applications), ENSTA ParisTech - CNRS - EDF - CEA, Université Paris-Saclay, 828 Bd des Maréchaux, 91732 Palaiseau Cedex, France
arnaud.malher@ensta-paristech.fr

Cyril Touzé

IMSIA (Institute of Mechanical Sciences and Industrial Applications), ENSTA ParisTech - CNRS - EDF - CEA, Université Paris-Saclay, 828 Bd des Maréchaux, 91732 Palaiseau Cedex, France
cyril.touze@ensta.fr

Olivier Doaré

IMSIA (Institute of Mechanical Sciences and Industrial Applications), ENSTA ParisTech - CNRS - EDF - CEA, Université Paris-Saclay, 828 Bd des Maréchaux, 91732 Palaiseau Cedex, France
olivier.doare@ensta.fr

Giuseppe Habib

Space Structures and Systems Laboratory Department of Aerospace and Mechanical Engineering University of Liège, Belgium
giuseppe.habib@ulg.ac.be

Gaëtan Kerschen

Space Structures and Systems Laboratory Department of Aerospace and Mechanical Engineering University of Liège, Belgium
g.kerschen@ulg.ac.be

1Corresponding author.

ASME doi:10.1115/1.4036420 History: Received September 28, 2016; Revised February 14, 2017

Abstract

The influence of a Nonlinear Tuned Vibration Absorber (NLTVA) on the airfoil flutter is investigated. In particular, its effect on the instability threshold and the potential subcriticality of the bifurcation is analyzed. For that purpose, the airfoil is modeled using the classical pitch and plunge aeroelastic model together with a linear approach for the aerodynamic loads. Large amplitude motions of the airfoil are taken into account with nonlinear restoring forces for the pitch and plunge degrees of freedom. The two cases of a hardening and a softening spring behavior are investigated. The influence of each NLTVA parameter is studied and an optimum tuning of these parameters is found. The study reveals the ability of the NLTVA to shift the instability, avoid its possible subcriticality and reduce the LCOs amplitude.

Copyright (c) 2017 by ASME
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