An Approach to the Automated Characterization of Out-of-Plane and In-Plane Local Defect Resonances

The paper presents an approach to efficiently detect local defect resonances (LDRs) in solids with localized defects. The 3D scanning laser Doppler vibrometry (3D SLDV) technique is applied to acquire vibration responses on the surface of a test sample due to a broadband vibration excitation applied...

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Published inMaterials Vol. 16; no. 8; p. 3084
Main Authors Zdziebko, Paweł, Krzemiński, Mateusz, Okoń, Maciej, Loi, Gabriela, Aymerich, Francesco, Pieczonka, Łukasz, Klepka, Andrzej
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 13.04.2023
MDPI
Subjects
Algorithms
Aluminum
Automation
Broadband
Composite materials
Computer simulation
Damage detection
Defects
Excitation
Experiments
laser vibrometry
local defect resonance
Methods
non-destructive testing
structural dynamics
structural health monitoring
Vibration
Vibration response
damage detection
structural health monitoring
laser vibrometry
structural dynamics
local defect resonance
non-destructive testing
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Summary:The paper presents an approach to efficiently detect local defect resonances (LDRs) in solids with localized defects. The 3D scanning laser Doppler vibrometry (3D SLDV) technique is applied to acquire vibration responses on the surface of a test sample due to a broadband vibration excitation applied by a piezoceramic transducer and modal shaker. Based on the response signals and known excitation, the frequency characteristics for individual response points are determined. The proposed algorithm then processes these characteristics to extract both out-of-plane and in-plane LDRs. Identification is based on calculating the ratio between local vibration levels and the mean vibration level of the structure as a background. The proposed procedure is verified on simulated data obtained from finite element (FE) simulations and validated experimentally for an equivalent test scenario. The obtained results confirmed the effectiveness of the method in identifying in-plane and out-of-plane LDRs for both numerical and experimental data. The results of this study are important for damage detection techniques utilizing LDRs to enhance the efficiency of detection.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma16083084