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Open AccessArticle

A Hybrid Reduced-Order Model for the Aeroelastic Analysis of Flexible Subsonic Wings—A Parametric Assessment

1
School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK
2
Department of Bioengineering and Aerospace Engineering, Universidad Carlos III de Madrid, 28911 Leganés (Madrid), Spain
*
Author to whom correspondence should be addressed.
Aerospace 2018, 5(3), 76; https://doi.org/10.3390/aerospace5030076
Received: 30 April 2018 / Revised: 25 June 2018 / Accepted: 9 July 2018 / Published: 17 July 2018
(This article belongs to the Special Issue Computational Aerodynamic Modeling of Aerospace Vehicles)
A hybrid reduced-order model for the aeroelastic analysis of flexible subsonic wings with arbitrary planform is presented within a generalised quasi-analytical formulation, where a slender beam is considered as the linear structural dynamics model. A modified strip theory is proposed for modelling the unsteady aerodynamics of the wing in incompressible flow, where thin aerofoil theory is corrected by a higher-fidelity model in order to account for three-dimensional effects on both distribution and deficiency of the sectional air load. Given a unit angle of attack, approximate expressions for the lift decay and build-up are then adopted within a linear framework, where the two effects are separately calculated and later combined. Finally, a modal approach is employed to write the generalised equations of motion in state-space form. Numerical results were obtained and critically discussed for the aeroelastic stability analysis of a uniform rectangular wing, with respect to the relevant aerodynamic and structural parameters. The proposed hybrid model provides sound theoretical insights and is well suited as an efficient parametric reduced-order aeroelastic tool for the preliminary multidisciplinary design and optimisation of flexible wings in the subsonic regime. View Full-Text
Keywords: hybrid reduced-order model; quasi-analytical; aeroelasticity; flexible wings; subsonic hybrid reduced-order model; quasi-analytical; aeroelasticity; flexible wings; subsonic
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MDPI and ACS Style

Berci, M.; Cavallaro, R. A Hybrid Reduced-Order Model for the Aeroelastic Analysis of Flexible Subsonic Wings—A Parametric Assessment. Aerospace 2018, 5, 76.

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