The effect of curved tips on the dynamics of composite rotor blades

Amoozgar, M.R.; Shaw, Alexander; Friswell, Michael

doi:10.1016/j.ast.2020.106197

Journal article 781 views 262 downloads

The effect of curved tips on the dynamics of composite rotor blades

M.R. Amoozgar, Alexander Shaw

, Michael Friswell

Aerospace Science and Technology, Volume: 106, Start page: 106197

Swansea University Authors: Alexander Shaw , Michael Friswell

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©2020 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND)
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DOI (Published version): 10.1016/j.ast.2020.106197

Abstract

In this paper, the dynamics of a tailored composite rotating blade with curved tips are investigated, with a view to improving the dynamic behaviour of the blade in flight. The blade tip is curved either in the out-of-plane or in the in-plane directions. The composite blade is modelled by using the...

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Published in:	Aerospace Science and Technology
ISSN:	1270-9638
Published:	Elsevier BV 2020
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa55197
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first_indexed	2020-09-17T15:21:03Z
last_indexed	2020-11-11T04:09:56Z
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spelling	2020-11-10T12:33:14.0445911 v2 55197 2020-09-17 The effect of curved tips on the dynamics of composite rotor blades 10cb5f545bc146fba9a542a1d85f2dea 0000-0002-7521-827X Alexander Shaw Alexander Shaw true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2020-09-17 AERO In this paper, the dynamics of a tailored composite rotating blade with curved tips are investigated, with a view to improving the dynamic behaviour of the blade in flight. The blade tip is curved either in the out-of-plane or in the in-plane directions. The composite blade is modelled by using the exact beam formulation, and the cross-sectional properties of the blade are obtained using the variational asymptotic method. The resulting nonlinear partial differential equations are discretised using a time-space scheme, and the stationary and rotating frequencies of the blade are obtained from the eigenvalues of the linearised system. Three case studies are considered here each of them representing one of the main elastic couplings that might happen in a composite blade. These three elastic couplings are the flap-twist, lag-twist, and extension-twist couplings. All these couplings are very important in the blade design as they can affect the twist and hence the dynamics of the blade. The blade tip length and curvature value are two main parameters that this paper is focused on. It is shown that the curved tip of the blade affects the blade frequencies by adding extra couplings, and therefore could be used as a potential morphing concept for tuning the frequencies, enhancing the aeroelastic stability or performance of the blade in flight. Journal Article Aerospace Science and Technology 106 106197 Elsevier BV 1270-9638 Rotating frequencies, Veering, Fully intrinsic equations, Composite blade, Elastic couplings 1 11 2020 2020-11-01 10.1016/j.ast.2020.106197 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2020-11-10T12:33:14.0445911 2020-09-17T16:16:48.1314291 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised M.R. Amoozgar 1 Alexander Shaw 0000-0002-7521-827X 2 Michael Friswell 3 55197__18195__355360f67c8f40fa93b6f03c403a6eb3.pdf 55197.pdf 2020-09-18T08:52:07.4534993 Output 1732935 application/pdf Accepted Manuscript true 2021-09-11T00:00:00.0000000 ©2020 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title	The effect of curved tips on the dynamics of composite rotor blades
spellingShingle	The effect of curved tips on the dynamics of composite rotor blades Alexander Shaw Michael Friswell
title_short	The effect of curved tips on the dynamics of composite rotor blades
title_full	The effect of curved tips on the dynamics of composite rotor blades
title_fullStr	The effect of curved tips on the dynamics of composite rotor blades
title_full_unstemmed	The effect of curved tips on the dynamics of composite rotor blades
title_sort	The effect of curved tips on the dynamics of composite rotor blades
author_id_str_mv	10cb5f545bc146fba9a542a1d85f2dea 5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv	10cb5f545bc146fba9a542a1d85f2dea_*_Alexander Shaw 5894777b8f9c6e64bde3568d68078d40_*_Michael Friswell
author	Alexander Shaw Michael Friswell
author2	M.R. Amoozgar Alexander Shaw Michael Friswell
format	Journal article
container_title	Aerospace Science and Technology
container_volume	106
container_start_page	106197
publishDate	2020
institution	Swansea University
issn	1270-9638
doi_str_mv	10.1016/j.ast.2020.106197
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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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 this paper, the dynamics of a tailored composite rotating blade with curved tips are investigated, with a view to improving the dynamic behaviour of the blade in flight. The blade tip is curved either in the out-of-plane or in the in-plane directions. The composite blade is modelled by using the exact beam formulation, and the cross-sectional properties of the blade are obtained using the variational asymptotic method. The resulting nonlinear partial differential equations are discretised using a time-space scheme, and the stationary and rotating frequencies of the blade are obtained from the eigenvalues of the linearised system. Three case studies are considered here each of them representing one of the main elastic couplings that might happen in a composite blade. These three elastic couplings are the flap-twist, lag-twist, and extension-twist couplings. All these couplings are very important in the blade design as they can affect the twist and hence the dynamics of the blade. The blade tip length and curvature value are two main parameters that this paper is focused on. It is shown that the curved tip of the blade affects the blade frequencies by adding extra couplings, and therefore could be used as a potential morphing concept for tuning the frequencies, enhancing the aeroelastic stability or performance of the blade in flight.
published_date	2020-11-01T04:09:14Z
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score	11.030252

The effect of curved tips on the dynamics of composite rotor blades

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