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Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors

C. Zang, H. B. Lan, D. D. Jiang, Michael Friswell

Shock and Vibration, Volume: 2021, Pages: 1 - 19

Swansea University Author: Michael Friswell

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DOI (Published version): 10.1155/2021/8895583

Abstract

A novel approach for mode shape feature extraction and model updating of axisymmetric structures based on radial Tchebichef moment (RTM) descriptors is proposed in this study. The mode shape features extracted by RTM descriptors can effectively compress the full-field modal vibration data and retain...

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Published in: Shock and Vibration
ISSN: 1070-9622 1875-9203
Published: Hindawi Limited 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56680
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spelling 2021-05-21T15:11:52.3971077 v2 56680 2021-04-19 Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2021-04-19 A novel approach for mode shape feature extraction and model updating of axisymmetric structures based on radial Tchebichef moment (RTM) descriptors is proposed in this study. The mode shape features extracted by RTM descriptors can effectively compress the full-field modal vibration data and retain the most important information. The reconstruction of mode shapes using RTM descriptors can accurately describe the mode shapes, and the simulation shows that the RTM function is superior to Zernike moment function in terms of its mathematical properties and its shape reconstruction ability. In addition, the proposed modal correlation coefficient of the RTM amplitude can overcome the main disadvantage of using the modal assurance criterion (MAC), which has difficulty in identifying double or close modes of symmetric structures. Furthermore, the model updating of axisymmetric structures based on RTM descriptors appears to be more efficient and effective than the normal model updating method directly using modal vibration data, avoids manipulating large amounts of mode shape data, and speeds up the convergence of updating parameters. The RTM descriptors used in correlation analysis and model updating are demonstrated with a cover of an aeroengine rig. The frequency deviation between the test and the FE model was reduced from 17.13% to 1.23% for the first 13 modes via the model updating process. It verified the potential to industrial application with the proposed method. Journal Article Shock and Vibration 2021 1 19 Hindawi Limited 1070-9622 1875-9203 10 3 2021 2021-03-10 10.1155/2021/8895583 COLLEGE NANME COLLEGE CODE Swansea University 2021-05-21T15:11:52.3971077 2021-04-19T10:18:04.1472543 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised C. Zang 1 H. B. Lan 2 D. D. Jiang 3 Michael Friswell 4 56680__19670__8a1acab6eae44752bb8ef7253d817268.pdf 56680.pdf 2021-04-19T10:19:48.4826750 Output 18397325 application/pdf Version of Record true Copyright © 2021 C. Zang et al. This is an open access article distributed under the Creative Commons Attribution License true eng http://creativecommons.org/licenses/by/4.0/
title Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
spellingShingle Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
Michael Friswell
title_short Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
title_full Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
title_fullStr Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
title_full_unstemmed Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
title_sort Mode Shape Description and Model Updating of Axisymmetric Structures Using Radial Tchebichef Moment Descriptors
author_id_str_mv 5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author Michael Friswell
author2 C. Zang
H. B. Lan
D. D. Jiang
Michael Friswell
format Journal article
container_title Shock and Vibration
container_volume 2021
container_start_page 1
publishDate 2021
institution Swansea University
issn 1070-9622
1875-9203
doi_str_mv 10.1155/2021/8895583
publisher Hindawi Limited
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 A novel approach for mode shape feature extraction and model updating of axisymmetric structures based on radial Tchebichef moment (RTM) descriptors is proposed in this study. The mode shape features extracted by RTM descriptors can effectively compress the full-field modal vibration data and retain the most important information. The reconstruction of mode shapes using RTM descriptors can accurately describe the mode shapes, and the simulation shows that the RTM function is superior to Zernike moment function in terms of its mathematical properties and its shape reconstruction ability. In addition, the proposed modal correlation coefficient of the RTM amplitude can overcome the main disadvantage of using the modal assurance criterion (MAC), which has difficulty in identifying double or close modes of symmetric structures. Furthermore, the model updating of axisymmetric structures based on RTM descriptors appears to be more efficient and effective than the normal model updating method directly using modal vibration data, avoids manipulating large amounts of mode shape data, and speeds up the convergence of updating parameters. The RTM descriptors used in correlation analysis and model updating are demonstrated with a cover of an aeroengine rig. The frequency deviation between the test and the FE model was reduced from 17.13% to 1.23% for the first 13 modes via the model updating process. It verified the potential to industrial application with the proposed method.
published_date 2021-03-10T14:09:15Z
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score 11.543985

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