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Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function

Aerospace thin-walled structures are susceptible to various forms of damage and they can be effectively inspected using Lamb wavefields. However, Lamb wavefields contain at least two dispersive modes which interfere with the generation of a clear image for damage visualization. Conventional mode fil...

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Main Authors: Shahrim, Muhamad Azim Azhad, Chia, Chen Ciang, Ramli, Hafiz Rashidi, Harmin, Mohammad Yazdi, Lee, Jung-Ryul
Format: Article
Published: Multidisciplinary Digital Publishing Institute 2023
Online Access:http://psasir.upm.edu.my/id/eprint/106425/
https://www.mdpi.com/2226-4310/10/4/347
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spelling my.upm.eprints.1064252024-08-16T08:13:29Z http://psasir.upm.edu.my/id/eprint/106425/ Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function Shahrim, Muhamad Azim Azhad Chia, Chen Ciang Ramli, Hafiz Rashidi Harmin, Mohammad Yazdi Lee, Jung-Ryul Aerospace thin-walled structures are susceptible to various forms of damage and they can be effectively inspected using Lamb wavefields. However, Lamb wavefields contain at least two dispersive modes which interfere with the generation of a clear image for damage visualization. Conventional mode filters produce inconsistent results due to the need for the ad hoc or manual adjustment of the processing parameters by experienced users. An automatic, adaptive mode filter is proposed to remove human subjectivity, thereby improving the consistency of the results and making it more practical to utilize. It converts the wavefield from the space-time domain to the wavenumbertime domain and then consolidates the data in the time and angular axes into a wavenumber response function (WRF) where the modes can be automatically isolated. The single-mode data were converted back into space-time domain for result visualization. Its effectiveness was experimentally proven by keeping 78.2“122.0 of energy for a wanted mode and suppressing the energy of an unwanted mode to 0.1“4.5. Its automatic adaptability was demonstrated through the improved visibility of a blind hole, corrosion, water-ingress in honeycomb panel, and impact damage in a complex composite wing. Consistent results can be generated in a highly efficient manner while significantly reducing the computational workload and hardware requirements. Multidisciplinary Digital Publishing Institute 2023-04-03 Article PeerReviewed Shahrim, Muhamad Azim Azhad and Chia, Chen Ciang and Ramli, Hafiz Rashidi and Harmin, Mohammad Yazdi and Lee, Jung-Ryul (2023) Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function. Aerospace, 10 (4). art. no. 347. pp. 1-20. ISSN 2226-4310 https://www.mdpi.com/2226-4310/10/4/347 10.3390/aerospace10040347
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Aerospace thin-walled structures are susceptible to various forms of damage and they can be effectively inspected using Lamb wavefields. However, Lamb wavefields contain at least two dispersive modes which interfere with the generation of a clear image for damage visualization. Conventional mode filters produce inconsistent results due to the need for the ad hoc or manual adjustment of the processing parameters by experienced users. An automatic, adaptive mode filter is proposed to remove human subjectivity, thereby improving the consistency of the results and making it more practical to utilize. It converts the wavefield from the space-time domain to the wavenumbertime domain and then consolidates the data in the time and angular axes into a wavenumber response function (WRF) where the modes can be automatically isolated. The single-mode data were converted back into space-time domain for result visualization. Its effectiveness was experimentally proven by keeping 78.2“122.0 of energy for a wanted mode and suppressing the energy of an unwanted mode to 0.1“4.5. Its automatic adaptability was demonstrated through the improved visibility of a blind hole, corrosion, water-ingress in honeycomb panel, and impact damage in a complex composite wing. Consistent results can be generated in a highly efficient manner while significantly reducing the computational workload and hardware requirements.
format Article
author Shahrim, Muhamad Azim Azhad
Chia, Chen Ciang
Ramli, Hafiz Rashidi
Harmin, Mohammad Yazdi
Lee, Jung-Ryul
spellingShingle Shahrim, Muhamad Azim Azhad
Chia, Chen Ciang
Ramli, Hafiz Rashidi
Harmin, Mohammad Yazdi
Lee, Jung-Ryul
Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
author_facet Shahrim, Muhamad Azim Azhad
Chia, Chen Ciang
Ramli, Hafiz Rashidi
Harmin, Mohammad Yazdi
Lee, Jung-Ryul
author_sort Shahrim, Muhamad Azim Azhad
title Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
title_short Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
title_full Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
title_fullStr Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
title_full_unstemmed Adaptive mode filter for Lamb wavefield in the wavenumber-time domain based on wavenumber response function
title_sort adaptive mode filter for lamb wavefield in the wavenumber-time domain based on wavenumber response function
publisher Multidisciplinary Digital Publishing Institute
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/106425/
https://www.mdpi.com/2226-4310/10/4/347
_version_ 1809142950281609216
score 13.211869

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