Engine Placement Effects on the Flutter of a Medium-Range Box-Wing Aircraft
Publication: Journal of Aerospace Engineering
Volume 36, Issue 4
Abstract
This study investigated the effects of powered engines on the stability boundaries of a box-wing configuration. The governing equations were obtained using Hamilton’s principle. The equivalent effects of engine’s mass and thrust were simulated using a concentrated mass which was subjected to a follower force. The structural dynamics of the box wing were modeled using two cantilever beams which were attached to each other through two longitudinal and torsional springs at their tips. The aerodynamic loads applied on the wings were calculated using Wagner’s unsteady aerodynamic model. The time-dependent and the parameter-dependent integral parts were eliminated using the multistep semianalytical method. To validate the developed aeroelastic model, the flutter speed and frequency of conventional wings and box wings were obtained, and very good agreement was observed. The analysis showed that the stability of the wing can be affected when the effects of engines are considered. Furthermore, the engine placement and thrust effects on the box-wing flutter speed and frequency were considered.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 36 • Issue 4 • July 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jul 12, 2022
Accepted: Jan 19, 2023
Published online: Apr 7, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 7, 2023
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