Reliability-Based Damage Identification Using Dynamic Signatures

AbstractBecause of the influence of the stochastic nature of structural properties and field measurements, the identification result of damage extent is, in essence, uncertain, causing possible deviations and affecting the reliability of the identification result. To give a probabilistic measure on the identification result of damage extent, a reliability-based damage identification method based on dynamic signatures is proposed in this study. The Monte Carlo simulation in conjunction with the response surface method is used to perform the reliability analysis of damage identification with given accuracy, and a trial-and-error procedure is proposed for conducting damage identification with acceptable reliability. The influence of both structural uncertainties and measurement noises on damage identification can be taken into account in the present approach. Meanwhile, the proposed method is capable of assessing the robustness of different types of dynamic signatures against noise and the sensitivity of var...

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