Yanhui Zhang and Wenyu Yang
A New Damage Identification Strategy for SHM Based On FBGs and Bayesian Model Updating Method
2734 - 2738
2012
6
12
International Journal of Industrial and Manufacturing Engineering
https://publications.waset.org/pdf/4002
https://publications.waset.org/vol/72
World Academy of Science, Engineering and Technology
One of the difficulties of the vibrationbased damage identification methods is the nonuniqueness of the results of damage identification. The different damage locations and severity may cause the identical response signal, which is even more severe for detection of the multiple damage. This paper proposes a new strategy for damage detection to avoid this nonuniqueness. This strategy firstly determines the approximates damage area based on the statistical pattern recognition method using the dynamic strain signal measured by the distributed fiber Bragg grating, and then accurately evaluates the damage information based on the Bayesian model updating method using the experimental modal data. The stochastic simulation method is then used to compute the highdimensional integral in the Bayesian problem. Finally, an experiment of the plate structure, simulating one part of mechanical structure, is used to verify the effectiveness of this approach.
Open Science Index 72, 2012