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Asymptotic approximation of flutter and buffeting response of torsional aeroelastic oscillator
Mayou, Anass; Heremans, Julien; Denoël, Vincent
2022In Proceedings of the 8th European-African Conference on Wind Engineering
Peer reviewed
 

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Keywords :
Flutter; Multiple Timescale Spectral Analysis; Background; Resonant
Abstract :
[en] Flutter design consists in the repetitive computation of the structural response for increasing wind velocities until reaching the instability of the aeroelastic system. A linear model of aerodynamic forces such as that based on Scanlan derivatives can be studied by means of equivalent frequency-dependent stiffness and damping. Therefore, the analysis in the frequency domain is suitable. In a spectral analysis, the variance of the response is the integral of the corresponding power spectral density characterized by its sharp peaks in the vicinity of the natural frequencies of the system. In this paper, we present an alternative solution to standard integration methods which extends the Background/Resonant decomposition to a single degree-of-freedom frequency dependent oscillator. The proposed method avoids the need for a dense frequency discretization, which significantly cuts the CPU load. While providing a decent accuracy, it also consists in simple closed form equations which give physical understanding. The investigation is limited to a single degree-of-freedom system but provides a significant insight into more complex models where such an approximation can become more valuable. A companion paper deals with the multi-degree-of-freedom case.
Disciplines :
Civil engineering
Author, co-author :
Mayou, Anass  ;  Université de Liège - ULiège > Département ArGEnCo ; Université de Liège - ULiège > Urban and Environmental Engineering
Heremans, Julien   ;  Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil ; Université de Liège - ULiège > Urban and Environmental Engineering
Denoël, Vincent   ;  Université de Liège - ULiège > Urban and Environmental Engineering  ; Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
 These authors have contributed equally to this work.
Language :
English
Title :
Asymptotic approximation of flutter and buffeting response of torsional aeroelastic oscillator
Publication date :
2022
Event name :
8th European-African Conference on Wind Engineering
Event place :
Bucharest, Romania
Event date :
20 - 23 Septembre 2022
Audience :
International
Main work title :
Proceedings of the 8th European-African Conference on Wind Engineering
Publisher :
UTCB Press
Peer reviewed :
Peer reviewed
Available on ORBi :
since 06 May 2022

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