Probabilistic damage characterisation in beams using guided waves

Ng, C.T., Veidt, M. and Lam, H. F. (2011). Probabilistic damage characterisation in beams using guided waves. In: Proceedings of the 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12. 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12, Hong Kong, (490-497). 26-28 January 2011. doi:10.1016/j.proeng.2011.07.061


Author Ng, C.T.
Veidt, M.
Lam, H. F.
Title of paper Probabilistic damage characterisation in beams using guided waves
Conference name 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12
Conference location Hong Kong
Conference dates 26-28 January 2011
Proceedings title Proceedings of the 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12   Check publisher's open access policy
Journal name Procedia Engineering   Check publisher's open access policy
Series Procedia Engineering
Place of Publication Amsterdam, The Netherlands
Publisher Elsevier BV
Publication Year 2011
Year available 2011
Sub-type Fully published paper
DOI 10.1016/j.proeng.2011.07.061
Open Access Status DOI
ISSN 1877-7058
Volume 14
Start page 490
End page 497
Total pages 8
Language eng
Abstract/Summary This paper presents a model-based probabilistic damage characterisation methodology for beams using guided waves. Damage location, length, depth and Young's modulus of the material are treats as unknown parameters and are determined using optimisation approach to maximise the probability density function of the damage scenario conditional on the measured guided wave signals. A two-stage optimisation strategy is proposed using simulated annealing to first guarantee the solution is close to the global optimum, a standard simplex search method is then employed to precisely determine the global optimum. In addition to damage characterisation, the proposed methodology is developed based on the Bayesian statistical framework, hence, it allows quantification of the uncertainties associated with damage characterisation results. The accuracy and robustness of the proposed methodology are investigated through a series of numerical case studies in which the spectral element method is employed to model the wave propagation and scattering at the damage.
Subjects 2200 Engineering
Keyword Bayesian statistical framework
Damage characterisation
Guided waves
Spectral element method
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Sub-type: Fully published paper
Collection: School of Mechanical & Mining Engineering Publications
 
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