Journal
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Volume 49, Issue 1-2, Pages 77-94Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2014.02.005
Keywords
Statistical damage detection; Vibration based methods; Temperature effects; Stochastic global models; Functionally pooled models; Structural health monitoring
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The statistical damage detection in a composite beam structure operating under different temperatures is considered based on vibration response-only signals. For this purpose a novel stochastic global model approach is introduced based upon statistical hypothesis testing and identified Functionally Pooled models capable of describing the temperature-dependent dynamics. Two versions of the approach that use either modal or discrete-time model parameters are postulated. This is a proof-of-concept study in which the effectiveness of the approach is confirmed via laboratory experiments. Comparisons with alternative methods attempting removal of the temperature effects from the damage-sensitive features are also made. (C) 2014 Elsevier Ltd. All rights reserved.
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