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Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades / Nidhal Jamia; P. Rajendran; N. Jamia; S. El-Borgi; M. I. Friswell; Michael Friswell

Shock and Vibration, Volume: 2018, Pages: 1 - 16

Swansea University Authors: Nidhal, Jamia, Michael, Friswell

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DOI (Published version): 10.1155/2018/3027980

Abstract

Blade vibration and blade clearance are effective diagnostic features for the identification of blade damage in rotating machines. Blade tip-timing (BTT) is a noncontact method that is often used to monitor the vibration and clearance of blades in a rotating machinery. Standard signal processing of...

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Published in: Shock and Vibration
ISSN: 1070-9622 1875-9203
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa48991
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last_indexed 2019-04-03T10:12:44Z
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spelling 2019-04-02T14:23:27.1013774 v2 48991 2019-02-26 Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades 846b2cd3a7717b296654010df30cb22a 0000-0003-0643-7812 Nidhal Jamia Nidhal Jamia true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2019-02-26 EEN Blade vibration and blade clearance are effective diagnostic features for the identification of blade damage in rotating machines. Blade tip-timing (BTT) is a noncontact method that is often used to monitor the vibration and clearance of blades in a rotating machinery. Standard signal processing of BTT measurements give one blade response sample per revolution of the machine which is often insufficient for the diagnosis of damage. This paper uses the raw data signals from the sensors directly and employs a wavelet energy-based mistuning index (WEBMI) to predict the presence and locations of damage in rotating blades. The Lipschitz exponent is derived from the wavelet packet coefficients and used to estimate the severity of the damage. In this study, experiments were conducted to obtain BTT measurements on rotating blades at  rpm using three different sensors: an active eddy current sensor, a passive eddy current sensor, and an optical sensor. In addition, hammer excitation experiments were conducted for various added mass (damage) cases to compute the damage severity for a bladed disk. To simulate the damage experimentally in the bladed disk and rotating blades, masses were added to the blades to alter their dynamics and mimic the damage. The results indicate that the WEBMI can detect the presence and location of damage in rotating blades using measurements from common BTT sensors. To check the robustness of the proposed damage severity index, the experimental results were compared with numerical simulation for the bladed disk and showed good agreement. Journal Article Shock and Vibration 2018 1 16 1070-9622 1875-9203 31 12 2018 2018-12-31 10.1155/2018/3027980 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2019-04-02T14:23:27.1013774 2019-02-26T13:45:32.3516737 College of Engineering Engineering Nidhal Jamia 0000-0003-0643-7812 1 P. Rajendran 2 N. Jamia 3 S. El-Borgi 4 M. I. Friswell 5 Michael Friswell 6 0048991-26022019134835.pdf rajendran2018.pdf 2019-02-26T13:48:35.5500000 Output 6351297 application/pdf Version of Record true 2019-02-26T00:00:00.0000000 true eng
title Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
spellingShingle Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
Nidhal, Jamia
Michael, Friswell
title_short Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
title_full Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
title_fullStr Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
title_full_unstemmed Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
title_sort Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
author_id_str_mv 846b2cd3a7717b296654010df30cb22a
5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 846b2cd3a7717b296654010df30cb22a_***_Nidhal, Jamia
5894777b8f9c6e64bde3568d68078d40_***_Michael, Friswell
author Nidhal, Jamia
Michael, Friswell
author2 Nidhal Jamia
P. Rajendran
N. Jamia
S. El-Borgi
M. I. Friswell
Michael Friswell
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container_title Shock and Vibration
container_volume 2018
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publishDate 2018
institution Swansea University
issn 1070-9622
1875-9203
doi_str_mv 10.1155/2018/3027980
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
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description Blade vibration and blade clearance are effective diagnostic features for the identification of blade damage in rotating machines. Blade tip-timing (BTT) is a noncontact method that is often used to monitor the vibration and clearance of blades in a rotating machinery. Standard signal processing of BTT measurements give one blade response sample per revolution of the machine which is often insufficient for the diagnosis of damage. This paper uses the raw data signals from the sensors directly and employs a wavelet energy-based mistuning index (WEBMI) to predict the presence and locations of damage in rotating blades. The Lipschitz exponent is derived from the wavelet packet coefficients and used to estimate the severity of the damage. In this study, experiments were conducted to obtain BTT measurements on rotating blades at  rpm using three different sensors: an active eddy current sensor, a passive eddy current sensor, and an optical sensor. In addition, hammer excitation experiments were conducted for various added mass (damage) cases to compute the damage severity for a bladed disk. To simulate the damage experimentally in the bladed disk and rotating blades, masses were added to the blades to alter their dynamics and mimic the damage. The results indicate that the WEBMI can detect the presence and location of damage in rotating blades using measurements from common BTT sensors. To check the robustness of the proposed damage severity index, the experimental results were compared with numerical simulation for the bladed disk and showed good agreement.
published_date 2018-12-31T04:10:18Z
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