Application of Bayesian approach for damage characterization in beams utilizing guided waves

Ng, C.T., Veidt, M. and Lam, H. F. (2011). Application of Bayesian approach for damage characterization in beams utilizing guided waves. In: Review of Progress in Quantitative Nondestructive Evaluation. 37th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE, San Diego, CA, (705-712). 18-23 July 2010. doi:10.1063/1.3591918


Author Ng, C.T.
Veidt, M.
Lam, H. F.
Title of paper Application of Bayesian approach for damage characterization in beams utilizing guided waves
Conference name 37th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Conference location San Diego, CA
Conference dates 18-23 July 2010
Proceedings title Review of Progress in Quantitative Nondestructive Evaluation   Check publisher's open access policy
Series AIP Conference Proceedings
Place of Publication College Park, MD United States
Publisher American Institute of Physics
Publication Year 2011
Year available 2011
Sub-type Fully published paper
DOI 10.1063/1.3591918
ISBN 9780735408883
ISSN 0094-243X
Volume 1335
Start page 705
End page 712
Total pages 8
Collection year 2012
Abstract/Summary A Bayesian approach for characterizing the damage in beams utilizing guided waves is presented. The proposed methodology treats the damage location, length, depth and the Young's modulus of the material as unknown model parameters. A two-stage optimization approach is applied for damage characterization using simulated annealing algorithm to first guarantee that the solution is close to the global optimum, followed by a standard simplex search method that maximizes the probability density function of a damage scenario conditional on the measurement data. One advantage of the proposed method is that instead of only pinpointing the damage location and extent, the uncertainty associated with the damage characterization results is also quantified. A series of comprehensive numerical case studies utilizing the spectral finite element method to model the wave propagation and scattering at the step damage are used to examine the accuracy and robustness of the proposed methodology. The studies include investigations of the influence of practical situations such as the effects of measurement noise, uncertainty of Young's modulus due to the temperature change, and interference of boundary reflections and scattered waves on the damage characterization results.
Subjects 3100 Physics and Astronomy
Keyword Bayesian Statistical Framework
Beam Damage Characterization
Guided Waves
Spectral Finite Element Method
Structural Health Monitoring
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Mechanical & Mining Engineering Publications
 
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