Aeroelasticity; Nonlinearity; Time Frequency Methods
Abstract :
[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
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
Allen, J.B., Rabiner, L.R., 1977. A unified approach to short-time Fourier analysis and synthesis. Proceedings of the IEEE 65, 1558-1564.
Anderson. J., 1995. Conjectures on new transonic aeroelastic phenomena. In: Proceedings of the CEAS International Forum on Aeroelasticity and Structural Dynamics, Manchester, UK.
Badcock, K.J., Sim, G., Richards, B.E., 1995. Aeroelastic studies using transonic flow CFD modelling. In: Proceedings of the CEAS International Forum on Aeroelasticity and Structural Dynamics, Manchester, UK.
Dimitriadis, G., Cooper, J.E., 1999. Limit cycle oscillation control and suppression. Aeronautical Journal 103, 257-263.
Dimitriadis, G., Cooper. J.E., 2000. Characterization of the behaviour of a simple aeroservoelastic system with control nonlinearities. Journal of Fluids and Structures 14, 1173-1193.
Friedmann, P.P., 1999. Renaissance of aeroelasticity and its future. Journal of Aircraft 35. 105-121.
Géradin, M., Rixen, D., 1997. Mechanical Vibrations. Wiley, Chichester.
Goura, L., Badcock, K., Woodgate, M., Richards, B., 2001a. A data exchange method for fluid-structure interaction problems. Aeronautical Journal 105, 215-221.
Goura, L., Badcock, K., Woodgate, M., Richards, B., 2001b. Implicit method for the time marching analysis of flutter. Aeronautical Journal 105, 199-214.
Guillot, D., Friedmann, P.P., 2001. Fundamental aeroelastic study combining unsteady computational fluid mechanics and adaptive control. Journal of Guidance Control and Dynamics 23, 1117-1126.
Hancock, G.J., Wright, J.R., Simpson, A., 1985. On the teaching of the principles of wing flexure-torsion flutter. Aeronautical Journal 89, 285-305.
Kehoe, M.W., 1995. A historical overview of flight flutter testing. Paper presented at the 80th meeting of the AGARD Structures and Materials Panel. Rotterdam, The Netherlands.
Kim, S.H., Lee, I., 1996. Aeroelastic analysis of a flexible airfoil with a freeplay non-linearity. Journal of Sound and Vibration 193, 823-846.
Lee, B.H.K., Price, S.J., Wong, Y.S., 1999. Nonlinear aeroelastic analysis of airfoils: bifurcation and chaos. Progress in Aerospace Sciences 35, 205-334.
Levitas, J., Weller, T., Singer, J., 1994. Poincare-like simple cell mapping for non-linear dynamical systems. Journal of Sound and Vibration 176, 641-662.
Liu, L., Wong, Y.S., Lee, B.H.K., 1999. Application of the centre manifold theory in non-linear aeroelasticity. Journal of Sound and Vibration 234, 641-659.
Mastroddi, F., Bettoli, A., 1999. Wavelet analysis for Hopf bifurcations with aeroelastic applications. Journal of Sound and Vibration 225, 887-913.
Moon, F.C., 1992. Chaotic and Fractal Dynamics-An Introduction for Applied Scientists and Engineers. Wiley, New York.
Price, S.J., Alighanbari, H., Lee, B.H.K., 1995. The aeroelastic behaviour of a two-dimensional airfoil with bilinear and cubic structural nonlinearities. Journal of Fluids and Structures 9, 175-193.
Price, S.J., Lee, B.H.K., Alighanbari, H., 1994. Postinstability behaviour of a two-dimensional airfoil with a structural nonlinearity. Journal of Aircraft 31, 1395-1401.
Raghothama, A., Narayanan, S., 1999. Non-linear dynamics of a two-dimensional airfoil by incremental harmonic balance method. Journal of Sound and Vibration 226, 493-517.
Richardson, M., Formenti, D.L., 1982. Parameter estimation from frequency response measurements using rational fraction polynomials. In: Proceedings of the 1st International Modal Analysis Conference, Orlando, FL.
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.
