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Improved mode tracking for the p-L flutter solution method based on aeroelastic derivatives

Quero, David and Vuillemin, Pierre and Poussot-Vassal, Charles (2022) Improved mode tracking for the p-L flutter solution method based on aeroelastic derivatives. In: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022. International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022, 13.-17. June 2022, Madrid, Spanien. ISBN 978-840942353-8.

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Abstract

In this work an improved mode tracking algorithm is developed for the p-L flutter solution method. Compared to the original criterion used for sorting the aeroelastic modes, the approach presented herein uses aeroelastic derivatives in order to predict the flutter solution at the next parameter value. The present method allows for a more robust and efficient sorting of the aeroelastic modes for configurations where the number of real and complex poles resulting from the representation of the aerodynamic term is high, ensuring a proper tracking of the modes corresponding to the structural degrees of freedom. The flutter p-L method together with the proposed mode tracking algorithm is applied to a 2 degrees-of-freedom airfoil configuration with high-fidelity unsteady aerodynamics and to the common research aeroelastic model representing a transport aircraft configuration. For the latter, a modified doublet-lattice method valid throughout the complex plane is used for the reference solution, allowing for the first time to validate the p-L flutter solution method for general configurations. The results show that the p-L method is able to truly represent the aeroelastic damping when compared to the classical p-k and g methods.

Item URL in elib:https://elib.dlr.de/187885/
Document Type:Conference or Workshop Item (Speech)
Title:Improved mode tracking for the p-L flutter solution method based on aeroelastic derivatives
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Quero, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vuillemin, PierreONERAUNSPECIFIEDUNSPECIFIED
Poussot-Vassal, CharlesONERAUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISBN:978-840942353-8
Status:Published
Keywords:Flutter, Loewner framework, aeroelastic derivatives, mode tracking
Event Title:International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:13.-17. June 2022
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 Simulation
Deposited By: Quero-Martin, David
Deposited On:22 Aug 2022 14:27
Last Modified:18 Aug 2023 11:49

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