Identification of limit-cycles for piecewise non-linear transonic aeroelastic systems

I. Roberts A L Gaitonde, N. A J Lieven, D. P. Jones

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

This paper describes a method of analysing aeroelastic systems with complex piecewise non-linear structural stiffness in the transonic regime. The technique employed in this paper utilises novel logarithmic and tanh functions to both represent discrete non-linearities and to act as a switch between different non-linear areas. The aerodynamic model used is generated using an eigenvalue realisation algorithm (ERA) which produces a reduced order model (ROM) from linearised Euler simulations. It is shown that techniques are ideally suited to use with continuation methods. Flutter boundaries and limit-cycle oscillations can then be rapidly identified with good accuracy.

Original languageEnglish
Title of host publication35th AIAA Fluid Dynamics Conference and Exhibit
Publication statusPublished - 1 Dec 2005
Event35th AIAA Fluid Dynamics Conference and Exhibit - Toronto, ON, United Kingdom
Duration: 6 Jun 20059 Jun 2005

Conference

Conference35th AIAA Fluid Dynamics Conference and Exhibit
CountryUnited Kingdom
CityToronto, ON
Period6/06/059/06/05

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