Defect localization and modulation indices separation in Aluminum structures using vibro-acoustic modulation
Citation Link: https://doi.org/10.15480/882.17170
Publikationstyp
Doctoral Thesis
Date Issued
2026
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2026-04-29
Institute
TORE-DOI
Citation
Technische Universtät Hamburg (2016)
This study addresses the mathematical description of the Vibro-Acoustic Modulation (VAM) response to separate modulation indices (MIs) and introduces a new modulation model that describes phase shifts in the measured response. Furthermore, a robust, baseline-free method for the localization of real cracks in plate-like aluminum structures is presented, based on a novel short-time VAM-based localization algorithm that tracks the first upper sideband at ω + Ω. Both topics are described theoretically and validated experimentally.
Subjects
Vibro-Acoustic Modulation (VAM)
Crack Detection
Defect Localization
Nonlinear Ultrasonics
Amplitude-Frequency-Phase Modulation model
DDC Class
620.11: Engineering Materials
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Name
Dissertation_MoBazrafkan_Defect Localization and Modulation Indices Separation in Aluminum Structures using Vibro-Acoustic Modulation .pdf
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