Aeroelastic Modeling and Flutter Prediction of Swept Wings Carrying Twin Powered Engines
Publication: Journal of Aerospace Engineering
Volume 26, Issue 3
Abstract
In this paper, the aeroelastic modeling and flutter analysis of swept aircraft wings carrying two powered engines is considered. The aeroelastic governing equations are determined via Hamilton’s variational principle; the equations include both concentrated mass and the thrust force terms. Also, Peter’s finite-state aerodynamic model, modified to take the sweep effects into account, is employed. The effect of engine thrust is modeled as follower forces of prescribed magnitude. Furthermore, flutter speed predictions are validated with the published results and good agreement is observed. Four different statuses of the engine thrust are selected to cover all possible situations in realistic cases. In the first case, both engines are turned off and the wing is simply affected by two external stores. The second and third cases correspond to the situation in which aircraft wing is modeled with one powered engine. This can take place when one of the engines is out of order or switched off. Finally, in the last case, two powered engines are investigated. The effects of the wing sweep angle and other design parameters such as the mass ratio and engine locations on the flutter boundaries are presented for these situations. The results show that the thrust and mass of the two engines has a complicated influence on the flutter boundaries.
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 26 • Issue 3 • July 2013
Pages: 586 - 593
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 14, 2010
Accepted: Sep 8, 2011
Published online: Sep 10, 2011
Published in print: Jul 1, 2013
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