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A robust Bayesian methodology for damage localization in plate-like structures using ultrasonic guided-waves

Cantero-Chinchilla, Sergio; Chiachío, Manuel; Chiachío, Juan; Chronopoulos, Dimitrios; Jones, Arthur

Authors

Sergio Cantero-Chinchilla

Manuel Chiachío

Juan Chiachío

Dimitrios Chronopoulos

Arthur Jones



Abstract

SHM methods for damage detection and localization in plate-like structures have typically relied on signal post-processing techniques applied to ultrasonic guided-waves. The time of flight is one of these signals features which has been extensively used by the SHM community for damage localization. One approach for obtaining the time of flight is by applying a particular time-frequency transform to capture the frequency and energy content of the wave at each instant of time. To this end, the selection of a suitable methodology for time-frequency transform among the many candidates available in the literature has typically relied on experience, or simply based on considerations about computational efficiency. In this paper, a full probabilistic method based on the Bayesian inverse problem is proposed to rigorously provide a robust estimate of the time of flight for each sensor independently. Then, the robust prediction is introduced as an input to the Bayesian inverse problem of damage localization. The results reveal that the proposed methodology is able to efficiently reconstruct the damage localization within a metallic plate without the need to assume a specific a priori time-frequency transform model.

Journal Article Type Article
Publication Date May 1, 2019
Print ISSN 0888-3270
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 122
Pages 192-205
APA6 Citation Cantero-Chinchilla, S., Chiachío, M., Chiachío, J., Chronopoulos, D., & Jones, A. (2019). A robust Bayesian methodology for damage localization in plate-like structures using ultrasonic guided-waves. Mechanical Systems and Signal Processing, 122, 192-205. doi:10.1016/j.ymssp.2018.12.021
DOI https://doi.org/10.1016/j.ymssp.2018.12.021
Keywords Bayesian inverse problem; Ultrasonic guided-waves; Time of flight; Damage localization; Multiple damage areas; Structural Health Monitoring
Publisher URL https://www.sciencedirect.com/science/article/pii/S0888327018308008

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