A reliable modal analysis is fundamental in vibration-measurements-based monitoring of large civil structures, such as the grandstands of the Meazza stadium in Milan. In this paper different techniques to extract the modal parameters out of data gathered under normal operational conditions have been compared: these methods work both in time and frequency domain,. A large amount of data has been collected since summer '03 during different sort of events: concerts, football matches and windy days; in all events a lot of different measurement points have been acquired and this allowed to apply all the identification techniques with different kinds of excitation. The comparison also takes into account the capability to correctly identify the modal parameters while reducing the number of transducers put on the structure. This will allow for a reduction of the number of transducers being part of the permanent monitoring system that is going to equip the structure in a close future.
Comparison between different operational modal analysis techniques for the identification of large civil structure modal parameters / Caprioli, A; Cigada, A; Vanali, Marcello. - ELETTRONICO. - (2006), pp. 1-9. (Intervento presentato al convegno 24th Conference and Exposition on Structural Dynamics 2006, IMAC-XXIV; St Louis, MI; United States; 30 January 2006 through 2 February 2006; Code 89649 tenutosi a S. Louis, Missouri, USA nel Gennaio, 2006).
Comparison between different operational modal analysis techniques for the identification of large civil structure modal parameters
VANALI, Marcello
2006-01-01
Abstract
A reliable modal analysis is fundamental in vibration-measurements-based monitoring of large civil structures, such as the grandstands of the Meazza stadium in Milan. In this paper different techniques to extract the modal parameters out of data gathered under normal operational conditions have been compared: these methods work both in time and frequency domain,. A large amount of data has been collected since summer '03 during different sort of events: concerts, football matches and windy days; in all events a lot of different measurement points have been acquired and this allowed to apply all the identification techniques with different kinds of excitation. The comparison also takes into account the capability to correctly identify the modal parameters while reducing the number of transducers put on the structure. This will allow for a reduction of the number of transducers being part of the permanent monitoring system that is going to equip the structure in a close future.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
