A time–frequency technique for the stability analysis of impulse responses from nonlinear aeroelastic systems

[en] A time–frequency method is proposed for the analysis of response time histories from nonlinear aeroelastic systems. The approach is based on a time-varying curve-fit of the short time Fourier transform of the impulse response. It is shown that the method can be used in order to obtain a clear picture of the sub-critical stability of a number of aeroelastic systems with a variety of structural and aerodynamic nonlinearities. Additionally, frequency and amplitude information can be obtained for both the linear and nonlinear signatures of the response signals in the sub- and postcritical regions. Finally, it is shown that, given certain types of nonlinear functions, sub-critical damping trends can be extrapolated to predict bifurcation airspeeds.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Dimitriadis, Grigorios ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Intéractions fluide structure et aérodynamique expérimentale

Cooper, Jonathan E; University of Manchester > School of Mechanical, Aerospace and Civil Engineering

Language :

English

Title :

A time–frequency technique for the stability analysis of impulse responses from nonlinear aeroelastic systems

Publication date :

2003

Journal title :

Journal of Fluids and Structures

ISSN :

0889-9746

eISSN :

1095-8622

Publisher :

Academic Press, London, United Kingdom

Volume :

Issue :

Pages :

1181–1201

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJG-49CT52F-9&_user=532038&_coverDate=07%2F31%2F2003&_rdoc=10&_fmt=high&_orig=browse&_srch=doc-info(%23toc%236878%232003%23999829991%23449973%23FLA%23display%23Volume)&_cdi=6878&_sort=d&_docanchor=&_ct=13&_acct=C000026659&_version=1&_urlVersion=0&_userid=532038&md5=8dbee673e79dcf07666227a81cd9b7bc

Available on ORBi :

since 13 February 2009

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Bibliography

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