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Structural optimization of an aeroelastic wind tunnel model for unsteady transonic testing

Dillinger, Johannes and Meddaikar, Yasser M. and Lepage, Arnaud and Fabbiane, Nicolo (2022) Structural optimization of an aeroelastic wind tunnel model for unsteady transonic testing. CEAS Aeronautical Journal. Springer. doi: 10.1007/s13272-022-00612-3. ISSN 1869-5590.

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Official URL: https://dx.doi.org/10.1007/s13272-022-00612-3


The reduction of loads, ultimately leading to a weight reduction and thus an increase in aircraft performance, plays an important role in the design of modern aircraft. To this end, two aeroelastic tailoring methodologies, independently developed at ONERA and DLR and aiming at load reduction by means of a sophisticated application of composite materials, were applied to a common model geometry. A choice was made in favor of the publicly available NASA Common Research Model (CRM) wing, featuring a comprehensive database with respect to geometry, as well as analytical and experimental research results. The span of the wing half to be investigated was set to 0.55 m, limited by the test section dimensions. While wind tunnel testing was part of ONERA's workshare, the model building was performed by DLR. This paper at hand focuses on the structural, aeroelastic optimization of the DLR wing. It is based on an optimization framework developed and constantly being enhanced and extended at the DLR - Institute of Aeroelasticity (DLR-AE). The paper describes the consideration of different structural objective functions, structural and aeroelastic constraint combinations, design field considerations, as well as the application of an aero load correction applied in the course of the optimization. The final results consist of the selection of an appropriate fiber type, optimized fiber layers represented as stacking sequence tables for the upper and lower wing skins, and the corresponding optimized jig twist distribution, required for manufacturing the lamination molds; in summary, all data required to start the construction of the wind tunnel model.

Item URL in elib:https://elib.dlr.de/188352/
Document Type:Article
Title:Structural optimization of an aeroelastic wind tunnel model for unsteady transonic testing
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Dillinger, JohannesJohannes.Dillinger (at) dlr.dehttps://orcid.org/0000-0002-7522-7555
Meddaikar, Yasser M.DLR - Institute of AeroelasticityUNSPECIFIED
Lepage, Arnaudarnaud.lepage (at) onera.frUNSPECIFIED
Fabbiane, Nicolonicolo.fabbiane (at) onera.frUNSPECIFIED
Date:1 September 2022
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Composite optimization, Aeroelasticity, Passive load alleviation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Dillinger, Johannes
Deposited On:19 Sep 2022 11:58
Last Modified:19 Sep 2022 11:58

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