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A Bayesian Approach for Localization of Acoustic Emission Source in Plate-Like Structures
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-02-23
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
This paper presents a Bayesian approach for localizing acoustic emission (AE) source in plate-like structures with consideration of uncertainties from modeling error and measurement noise.
A PZT sensor network is deployed to monitor and acquire AE wave signals released by possible damage.
By using continuous wavelet transform (CWT), the time-of-flight (TOF) information of the AE wave signals is extracted and measured.
With a theoretical TOF model, a Bayesian parameter identification procedure is developed to obtain the AE source location and the wave velocity at a specific frequency simultaneously and meanwhile quantify their uncertainties.
It is based on Bayes’ theorem that the posterior distributions of the parameters about the AE source location and the wave velocity are obtained by relating their priors and the likelihood of the measured time difference data.
A Markov chain Monte Carlo (MCMC) algorithm is employed to draw samples to approximate the posteriors.
Also, a data fusion scheme is performed to fuse results identified at multiple frequencies to increase accuracy and reduce uncertainty of the final localization results.
Experimental studies on a stiffened aluminum panel with simulated AE events by pensile lead breaks (PLBs) are conducted to validate the proposed Bayesian AE source localization approach.
American Psychological Association (APA)
Yan, Gang& Tang, Jianfei. 2015. A Bayesian Approach for Localization of Acoustic Emission Source in Plate-Like Structures. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-14.
https://search.emarefa.net/detail/BIM-1073316
Modern Language Association (MLA)
Yan, Gang& Tang, Jianfei. A Bayesian Approach for Localization of Acoustic Emission Source in Plate-Like Structures. Mathematical Problems in Engineering No. 2015 (2015), pp.1-14.
https://search.emarefa.net/detail/BIM-1073316
American Medical Association (AMA)
Yan, Gang& Tang, Jianfei. A Bayesian Approach for Localization of Acoustic Emission Source in Plate-Like Structures. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-14.
https://search.emarefa.net/detail/BIM-1073316
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1073316