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The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model

Davide Balatti, Hamed Haddad Khodaparast Orcid Logo, Michael Friswell, Marinos Manolesos, Mohammadreza Amoozgar

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Volume: 236, Issue: 2, Pages: 219 - 237

Swansea University Authors: Davide Balatti, Hamed Haddad Khodaparast Orcid Logo, Michael Friswell, Marinos Manolesos

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DOI (Published version): 10.1177/09544100211010915

Abstract

In recent years, the development of lighter and more efficient transport aircraft has led to an increased focus on gust load alleviation. A recent strategy is based on the use of folding wingtip devices that increase the aspect ratio and therefore improve the aircraft performance. Moreover, numerica...

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Published in: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
ISSN: 0954-4100 2041-3025
Published: SAGE Publications 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa56647
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A recent strategy is based on the use of folding wingtip devices that increase the aspect ratio and therefore improve the aircraft performance. Moreover, numerical studies have suggested such a folding wingtip solution may incorporate spring devices in order to provide additional gust load alleviation ability in flight. It has been shown that wingtip mass, stiffness connection and hinge orientation are key parameters to avoid flutter and achieve load alleviation during gusts. The objective of this work is to show the effects of aeroelastic hinged wingtip on the problem of worst-case gust prediction and the parameterization and optimization of such a model for this particular problem, that is, worst-case gust load prediction. In this article, a simplified aeroelastic model of full symmetric aircraft with rigid movable wingtips is developed. The effects of hinge position, orientation and spring stiffness are considered in order to evaluate the performance of this technique for gust load alleviation. In addition, the longitudinal flight dynamics of a rigid aircraft with an elastic wing and folding wingtips is studied. Multi-objective optimizations are performed using a genetic algorithm to exploit the optimal combinations of the wingtip parameters that minimize the gust response for the whole flight envelope while keeping flutter speed within the safety margin. 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spelling 2022-02-16T16:56:38.0927961 v2 56647 2021-04-12 The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model 4c58ba20bbabfef44b00b143e96b37e1 Davide Balatti Davide Balatti true false f207b17edda9c4c3ea074cbb7555efc1 0000-0002-3721-4980 Hamed Haddad Khodaparast Hamed Haddad Khodaparast true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 44a3e0d351ccd7a8365d5fc7c50c8778 Marinos Manolesos Marinos Manolesos true false 2021-04-12 AERO In recent years, the development of lighter and more efficient transport aircraft has led to an increased focus on gust load alleviation. A recent strategy is based on the use of folding wingtip devices that increase the aspect ratio and therefore improve the aircraft performance. Moreover, numerical studies have suggested such a folding wingtip solution may incorporate spring devices in order to provide additional gust load alleviation ability in flight. It has been shown that wingtip mass, stiffness connection and hinge orientation are key parameters to avoid flutter and achieve load alleviation during gusts. The objective of this work is to show the effects of aeroelastic hinged wingtip on the problem of worst-case gust prediction and the parameterization and optimization of such a model for this particular problem, that is, worst-case gust load prediction. In this article, a simplified aeroelastic model of full symmetric aircraft with rigid movable wingtips is developed. The effects of hinge position, orientation and spring stiffness are considered in order to evaluate the performance of this technique for gust load alleviation. In addition, the longitudinal flight dynamics of a rigid aircraft with an elastic wing and folding wingtips is studied. Multi-objective optimizations are performed using a genetic algorithm to exploit the optimal combinations of the wingtip parameters that minimize the gust response for the whole flight envelope while keeping flutter speed within the safety margin. Two strategies to increase flutter speed based on the modification of the wingtip parameters are presented. Journal Article Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 236 2 219 237 SAGE Publications 0954-4100 2041-3025 Aeroelasticity, gust load alleviation, folding wingtip, passive control 1 2 2022 2022-02-01 10.1177/09544100211010915 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) UKRI EP/R006768/1 2022-02-16T16:56:38.0927961 2021-04-12T17:27:39.1517190 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Davide Balatti 1 Hamed Haddad Khodaparast 0000-0002-3721-4980 2 Michael Friswell 3 Marinos Manolesos 4 Mohammadreza Amoozgar 5 56647__20376__ec764569600f402183322856af67db1f.pdf 56647.pdf 2021-07-09T17:18:34.5129707 Output 4319189 application/pdf Version of Record true This article is distributed under the terms of the Creative Commons Attribution 4.0 License true eng https://creativecommons.org/licenses/by/4.0/
title The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
spellingShingle The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
Davide Balatti
Hamed Haddad Khodaparast
Michael Friswell
Marinos Manolesos
title_short The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
title_full The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
title_fullStr The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
title_full_unstemmed The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
title_sort The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model
author_id_str_mv 4c58ba20bbabfef44b00b143e96b37e1
f207b17edda9c4c3ea074cbb7555efc1
5894777b8f9c6e64bde3568d68078d40
44a3e0d351ccd7a8365d5fc7c50c8778
author_id_fullname_str_mv 4c58ba20bbabfef44b00b143e96b37e1_***_Davide Balatti
f207b17edda9c4c3ea074cbb7555efc1_***_Hamed Haddad Khodaparast
5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
44a3e0d351ccd7a8365d5fc7c50c8778_***_Marinos Manolesos
author Davide Balatti
Hamed Haddad Khodaparast
Michael Friswell
Marinos Manolesos
author2 Davide Balatti
Hamed Haddad Khodaparast
Michael Friswell
Marinos Manolesos
Mohammadreza Amoozgar
format Journal article
container_title Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
container_volume 236
container_issue 2
container_start_page 219
publishDate 2022
institution Swansea University
issn 0954-4100
2041-3025
doi_str_mv 10.1177/09544100211010915
publisher SAGE Publications
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
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description In recent years, the development of lighter and more efficient transport aircraft has led to an increased focus on gust load alleviation. A recent strategy is based on the use of folding wingtip devices that increase the aspect ratio and therefore improve the aircraft performance. Moreover, numerical studies have suggested such a folding wingtip solution may incorporate spring devices in order to provide additional gust load alleviation ability in flight. It has been shown that wingtip mass, stiffness connection and hinge orientation are key parameters to avoid flutter and achieve load alleviation during gusts. The objective of this work is to show the effects of aeroelastic hinged wingtip on the problem of worst-case gust prediction and the parameterization and optimization of such a model for this particular problem, that is, worst-case gust load prediction. In this article, a simplified aeroelastic model of full symmetric aircraft with rigid movable wingtips is developed. The effects of hinge position, orientation and spring stiffness are considered in order to evaluate the performance of this technique for gust load alleviation. In addition, the longitudinal flight dynamics of a rigid aircraft with an elastic wing and folding wingtips is studied. Multi-objective optimizations are performed using a genetic algorithm to exploit the optimal combinations of the wingtip parameters that minimize the gust response for the whole flight envelope while keeping flutter speed within the safety margin. Two strategies to increase flutter speed based on the modification of the wingtip parameters are presented.
published_date 2022-02-01T04:11:45Z
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score 11.01353

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