Automated modal identification and tracking: Application to an iron arch bridge
Structural Control and Health Monitoring
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Cabboi, A., Magalhaes, F., Gentile, C., & Cunha, A. (2016). Automated modal identification and tracking: Application to an iron arch bridge. Structural Control and Health Monitoring, 24 (e1854)https://doi.org/10.1002/stc.1854
Challenges concerning the automation of modal identification and tracking procedures in permanent monitoring systems for Structural Health Monitoring purposes are discussed. In this context, an automated procedure based on parametric identification methods that involve the interpretation of stabilization diagrams is proposed. The methodology comprehends two key points: (i) automatic analysis of stabilization diagrams, performed through a first check of reasonable damping ratio, a subsequent modal complexity check and a final clustering of structural modes; (ii) automated tracking of the evolution in time of the identified modal properties. The proposed modal clustering and tracking steps exploit the introduction of self-adaptable dynamic thresholds, that do not require any a priori manual tuning for the different recorded data set. Finally, the proposed approach was successfully validated using real data collected on a historic iron arch bridge.
automatic modal identification, vibration monitoring, operational modal analysis, structural dynamics, iron arch bridge
External DOI: https://doi.org/10.1002/stc.1854
This record's URL: https://www.repository.cam.ac.uk/handle/1810/253754