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Nonlinear Aeroelastic Simulations and Stability Analysis of the Pazy Wing Aeroelastic Benchmark

Hilger, Jonathan and Ritter, Markus Raimund (2021) Nonlinear Aeroelastic Simulations and Stability Analysis of the Pazy Wing Aeroelastic Benchmark. Aerospace, 8 (10), pp. 1-29. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/aerospace8100308. ISSN 2226-4310.

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Official URL: https://www.mdpi.com/2226-4310/8/10/308

Abstract

The Pazy wing aeroelastic benchmark is a highly flexible wind tunnel model investigated in the Large Deflection Working Group as part of the Third Aeroelastic Prediction Workshop. Due to the design of the model, very large elastic deformations in the order of 50% span are generated at highest dynamic pressures and angles of attack in the wind tunnel. This paper presents static coupling simulations and stability analyses for selected onflow velocities and angles of attack. Therefore, an aeroelastic solver developed at the German Aerospace Center (DLR) is used for static coupling simulations, which couples a vortex lattice method with the commercial finite element solver MSC Nastran. For the stability analysis, a linearised aerodynamic model is derived analytically from the unsteady vortex lattice method and integrated with a modal structural model into a monolithic aeroelastic discrete-time state-space model. The aeroelastic stability is then determined by calculating the eigenvalues of the system's dynamics matrix. It is shown that the stability of the wing in terms of flutter changes significantly with increasing deflection and is heavily influenced by the change in modal properties, i.e., structural eigenvalues and eigenvectors.

Item URL in elib:https://elib.dlr.de/144659/
Document Type:Article
Title:Nonlinear Aeroelastic Simulations and Stability Analysis of the Pazy Wing Aeroelastic Benchmark
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hilger, JonathanJonathan.Hilger (at) dlr.dehttps://orcid.org/0000-0003-4138-0807
Ritter, Markus RaimundMarkus.Ritter (at) dlr.dehttps://orcid.org/0000-0003-3828-0397
Date:18 October 2021
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:8
DOI:10.3390/aerospace8100308
Page Range:pp. 1-29
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Special Issue "Aeroelasticity, Volume III"
ISSN:2226-4310
Status:Published
Keywords:nonlinear aeroelasticity, VLM, geometric nonlinearities, large deformations, FEM, linearisation, LTI system, stability analysis
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 - Digital Technologies
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Hilger, Jonathan
Deposited On:21 Oct 2021 12:03
Last Modified:24 May 2022 23:47

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