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6 - Dynamics of Flexible Aircraft with Small-Amplitude Vibrations

Published online by Cambridge University Press:  29 June 2023

Rafael Palacios  and
Carlos E. S. Cesnik
Rafael Palacios
Affiliation:
Imperial College of Science, Technology and Medicine, London
Carlos E. S. Cesnik
Affiliation:
University of Michigan, Ann Arbor
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Summary

The dynamic interactions between aeroelasticity and flight dynamics are discussed, under the assumption of small-amplitude vibrations of the elastic aircraft. Firstly, the equations of the dynamics of a flexible aircraft are described using quasi-coordinates. Linear normal modes are then defined, and used to project the dynamics of the flexible aircraft. Next, linear methods for unsteady aerodynamics are introduced with a particular focus in the doublet-lattice method. The linear dynamic response of the aircraft is finally assembled using rational-function approximations of the frequency-domain aerodynamics.

Keywords

linear vibrationsmodal coordinatesdynamic loadsunsteady aerodynamicsdoublet-lattice methodflutterrational-function approximationsstability analysis
Type
Chapter
Information
Dynamics of Flexible Aircraft
Coupled Flight Mechanics, Aeroelasticity, and Control
 , pp. 209 - 276
Publisher: Cambridge University Press
Print publication year: 2023

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