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Artifact suppression in ultrasonic guided wave damage imaging enhanced by topologically optimized mode selective meta-filter.

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Title: Artifact suppression in ultrasonic guided wave damage imaging enhanced by topologically optimized mode selective meta-filter.
Authors: Tian, Xiaochuan1 (AUTHOR), Song, Ailing1 (AUTHOR) ailingsong@ecust.edu.cn, Cao, Zhicong1 (AUTHOR), Peng, Siyuan1 (AUTHOR), Li, Youcheng1 (AUTHOR), Xiang, Yanxun1 (AUTHOR) yxxiang@ecust.edu.cn
Source: Ultrasonics. Oct2026, Vol. 166, pN.PAG-N.PAG. 1p.
Subjects: Lamb waves, Ultrasonic imaging, Ultrasonic propagation, Mathematical optimization, Structural health monitoring, Signal processing
Abstract: • Mode selective meta -filter (MSM) is designed based on inverse topology optimization framework. • MSM achieves 96.5% A0 mode attenuation and high S0 mode transmission efficiency. • MSM significantly improves imaging SNR and suppresses background artifacts. In ultrasonic guided-wave inspection of plate-like structures, Lamb wave multimode interference often results imaging artifacts and reduces damage localization accuracy. To purify the ultrasonic guided-wave mode at the physical level and suppress the artifacts, this paper introduces an inverse design framework based on topology optimization and, accordingly, develops a mode selective meta -filter. Within the target frequency band near 200 kHz, the designed meta -filter effectively suppresses the A0 mode while preserving high transmission efficiency of the S0 mode. Band-structure analysis and frequency- and time-domain finite element simulations reveal the underlying mechanism of its mode-selective wave manipulation. The experimental filtering results are in excellent agreement with the numerical predictions, demonstrating both the mode purification capability and practical feasibility of the meta -filter under realistic conditions. Furthermore, by integrating the meta -filter with an improved damage imaging method, both simulation and experimental results show a pronounced enhancement in imaging focusing and a substantial reduction in background artifacts. By realizing guided-wave mode purification through physical method and avoiding complex signal post-processing, this work provides a viable solution for structural health monitoring. [ABSTRACT FROM AUTHOR]
Copyright of Ultrasonics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194424030
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Artifact suppression in ultrasonic guided wave damage imaging enhanced by topologically optimized mode selective meta-filter.
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  Data: <searchLink fieldCode="AR" term="%22Tian%2C+Xiaochuan%22">Tian, Xiaochuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Ailing%22">Song, Ailing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ailingsong@ecust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Cao%2C+Zhicong%22">Cao, Zhicong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peng%2C+Siyuan%22">Peng, Siyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Youcheng%22">Li, Youcheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiang%2C+Yanxun%22">Xiang, Yanxun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yxxiang@ecust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Ultrasonics%22">Ultrasonics</searchLink>. Oct2026, Vol. 166, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Lamb+waves%22">Lamb waves</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+imaging%22">Ultrasonic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+propagation%22">Ultrasonic propagation</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+optimization%22">Mathematical optimization</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+health+monitoring%22">Structural health monitoring</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+processing%22">Signal processing</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Mode selective meta -filter (MSM) is designed based on inverse topology optimization framework. • MSM achieves 96.5% A0 mode attenuation and high S0 mode transmission efficiency. • MSM significantly improves imaging SNR and suppresses background artifacts. In ultrasonic guided-wave inspection of plate-like structures, Lamb wave multimode interference often results imaging artifacts and reduces damage localization accuracy. To purify the ultrasonic guided-wave mode at the physical level and suppress the artifacts, this paper introduces an inverse design framework based on topology optimization and, accordingly, develops a mode selective meta -filter. Within the target frequency band near 200 kHz, the designed meta -filter effectively suppresses the A0 mode while preserving high transmission efficiency of the S0 mode. Band-structure analysis and frequency- and time-domain finite element simulations reveal the underlying mechanism of its mode-selective wave manipulation. The experimental filtering results are in excellent agreement with the numerical predictions, demonstrating both the mode purification capability and practical feasibility of the meta -filter under realistic conditions. Furthermore, by integrating the meta -filter with an improved damage imaging method, both simulation and experimental results show a pronounced enhancement in imaging focusing and a substantial reduction in background artifacts. By realizing guided-wave mode purification through physical method and avoiding complex signal post-processing, this work provides a viable solution for structural health monitoring. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ultrasonics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ultras.2026.108129
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Lamb waves
        Type: general
      – SubjectFull: Ultrasonic imaging
        Type: general
      – SubjectFull: Ultrasonic propagation
        Type: general
      – SubjectFull: Mathematical optimization
        Type: general
      – SubjectFull: Structural health monitoring
        Type: general
      – SubjectFull: Signal processing
        Type: general
    Titles:
      – TitleFull: Artifact suppression in ultrasonic guided wave damage imaging enhanced by topologically optimized mode selective meta-filter.
        Type: main
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          Name:
            NameFull: Tian, Xiaochuan
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            NameFull: Song, Ailing
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            NameFull: Cao, Zhicong
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            NameFull: Peng, Siyuan
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            NameFull: Li, Youcheng
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            NameFull: Xiang, Yanxun
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            – D: 01
              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
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              Value: 166
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            – TitleFull: Ultrasonics
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