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Effect of Aerodynamic Damping Approximations on Aeroelastic Eigensensitivities

Kaiser, Christoph and Quero-Martin, David (2022) Effect of Aerodynamic Damping Approximations on Aeroelastic Eigensensitivities. Aerospace, 9 (127), pp. 1-21. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/aerospace9030127. ISSN 2226-4310.

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Official URL: https://www.mdpi.com/2226-4310/9/3/127

Abstract

Aeroelastic sensitivities for the flutter solution are a crucial component of the multidisciplinary optimization methods employed in modern aircraft design. This paper derives the aeroelastic sensitivities for different aerodynamic damping approximations - the p-k method, the g method and the generalized aeroelastic analysis method - highlighting the influence of the employed aerodynamic approximation on the required derivatives. The derived formulation for the determination of aeroelastic sensitivities by means of a direct method is verified for the case of a two-degree-of-freedom typical section model, where analytical aeroelastic sensitivities can be analytically obtained. For this and for an additional model, namely the AGARD 445.6 weakened wing, the significant effect of the aerodynamic damping approximation on the aeroelastic sensitivities is shown.

Item URL in elib:https://elib.dlr.de/185473/
Document Type:Article
Title:Effect of Aerodynamic Damping Approximations on Aeroelastic Eigensensitivities
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kaiser, ChristophChristoph.Kaiser (at) dlr.dehttps://orcid.org/0000-0001-9156-8352
Quero-Martin, DavidDavid.QueroMartin (at) dlr.dehttps://orcid.org/0000-0003-2602-4265
Date:1 March 2022
Journal or Publication Title:Aerospace
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.3390/aerospace9030127
Page Range:pp. 1-21
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2226-4310
Status:Published
Keywords:aeroelasticity, aerodynamic damping, flutter sensitivities, eigensensitivities
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Kaiser, Christoph
Deposited On:04 Mar 2022 09:17
Last Modified:04 Mar 2022 09:17

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