Damage detection under varying environmental and operational conditions using Wavelet Transform Modulus Maxima decay lines similarity

Autor: Tjirkallis, A., Kyprianou, Andreas
Přispěvatelé: Kyprianou, Andreas [0000-0002-5037-2051]
Rok vydání: 2016
Předmět:
Varying operational conditions
Cantilever
Aerospace Engineering
Continuous Wavelet Transform
02 engineering and technology
01 natural sciences
Wavelet transforms
WTMM decay line
0203 mechanical engineering
Similarity (network science)
Normalized cross correlation
0103 physical sciences
Environmental conditions
Engineering structures
Operational conditions
010301 acoustics
Continuous wavelet transform
Civil and Structural Engineering
Mathematics
Wavelet transform modulus maxima
Pointwise
Structural health monitoring
Cross-correlation
business.industry
Mechanical Engineering
Wavelet transform
Structural engineering
Damage detection
Varying environmental conditions
Computer Science Applications
020303 mechanical engineering & transports
Control and Systems Engineering
Signal Processing
Structural health monitoring (SHM)
business
Biological system
Maxima
Zdroj: Mechanical Systems and Signal Processing
ISSN: 0888-3270
DOI: 10.1016/j.ymssp.2015.04.008
Popis: Over the last three decades, there have been increasing demands to develop and deploy Structural Health Monitoring (SHM) systems for engineering structures in service. Since these structures are subjected to varying environmental and operational conditions, reliable SHM methodologies must be capable of not misattributing to damage changes due to environmental conditions. This paper presents a novel damage detection methodology based on the similarity between maxima decay lines of the continuous wavelet transform scalogram of the structural responses obtained under different operational and environmental conditions. The normalized cross correlation (NCC) is used as a measure of this similarity. In addition, the pointwise summation of similar Wavelet Transform Modulus Maxima (WTMM) decay lines is used to identify changes due to the presence of damage from different force realizations and/or varying environmental conditions. The effectiveness of the proposed methodology is demonstrated using a simulated 3DOF system and an experimental cantilever beam. © 2015 Elsevier Ltd. All rights reserved. 66-67 282 297 282-297
Databáze: OpenAIRE
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