On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study
This paper presents an aeroelastic analysis of a polymorphing wing capable of active span extension and passive pitch variation. The wing is split into two segments: an inboard segment responsible for span extension/retraction and an outboard segment capable of pitch variation. The two segments are...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/9/9/483 |
| _version_ | 1797492446550032384 |
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| author | Zawar Haider Rafic M. Ajaj Lakmal Seneviratne |
| author_facet | Zawar Haider Rafic M. Ajaj Lakmal Seneviratne |
| author_sort | Zawar Haider |
| collection | DOAJ |
| description | This paper presents an aeroelastic analysis of a polymorphing wing capable of active span extension and passive pitch variation. The wing is split into two segments: an inboard segment responsible for span extension/retraction and an outboard segment capable of pitch variation. The two segments are connected through an overlapping spar and a torsional spring. A finite element aeroelastic model is developed where the wing structure is discretized into Euler–Bernoulli beam elements and the aerodynamic loads are calculated using Theodorsen’s unsteady model. A comprehensive parametric analysis is carried out with and without span extension to analyze the effect of varying critical design parameters, such as elastic axis position of outboard section and torsional spring rigidity, and conditions for aeroelastic phenomena of flutter and divergence are studied. A gust load analysis is carried out to quantify the capability of the outboard wing passive twist mechanism to alleviate loads. Finally, a nonlinear analysis is carried out by replacing the linear torsional spring with a nonlinear cubic spring to study the effects of cubic hardening and softening on the aeroelasticity of the polymorphing wing. |
| first_indexed | 2024-03-10T01:03:49Z |
| format | Article |
| id | doaj.art-ba023439e06341a2923089e1434f276a |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-10T01:03:49Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-ba023439e06341a2923089e1434f276a2023-11-23T14:30:42ZengMDPI AGAerospace2226-43102022-08-019948310.3390/aerospace9090483On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric StudyZawar Haider0Rafic M. Ajaj1Lakmal Seneviratne2Department of Aerospace Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab EmiratesDepartment of Aerospace Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab EmiratesKhalifa University Robotics Institute, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab EmiratesThis paper presents an aeroelastic analysis of a polymorphing wing capable of active span extension and passive pitch variation. The wing is split into two segments: an inboard segment responsible for span extension/retraction and an outboard segment capable of pitch variation. The two segments are connected through an overlapping spar and a torsional spring. A finite element aeroelastic model is developed where the wing structure is discretized into Euler–Bernoulli beam elements and the aerodynamic loads are calculated using Theodorsen’s unsteady model. A comprehensive parametric analysis is carried out with and without span extension to analyze the effect of varying critical design parameters, such as elastic axis position of outboard section and torsional spring rigidity, and conditions for aeroelastic phenomena of flutter and divergence are studied. A gust load analysis is carried out to quantify the capability of the outboard wing passive twist mechanism to alleviate loads. Finally, a nonlinear analysis is carried out by replacing the linear torsional spring with a nonlinear cubic spring to study the effects of cubic hardening and softening on the aeroelasticity of the polymorphing wing.https://www.mdpi.com/2226-4310/9/9/483polymorphingtwist morphingspan morphingaeroelasticityflutter |
| spellingShingle | Zawar Haider Rafic M. Ajaj Lakmal Seneviratne On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study Aerospace polymorphing twist morphing span morphing aeroelasticity flutter |
| title | On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study |
| title_full | On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study |
| title_fullStr | On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study |
| title_full_unstemmed | On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study |
| title_short | On the Aeroelasticity of the Active Span and Passive Pitching Polymorphing Wing: A Parametric Study |
| title_sort | on the aeroelasticity of the active span and passive pitching polymorphing wing a parametric study |
| topic | polymorphing twist morphing span morphing aeroelasticity flutter |
| url | https://www.mdpi.com/2226-4310/9/9/483 |
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