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Subspace-based detection of fatigue damage on a steel frame laboratory structure for offshore applications

  • Altematively to common modal analysis as tool for detectmg changes between a reference and an actual (possibly damaged) structural state, the subspace-based damage detection method has been developed in recent years and successfully adopted to test application data sets. Characteristic for that method is that instead of analyzing modal parameters, a Statistical test with respect to changes of a dynamic signature of structural response is introduced. Therefor, a Gaussian residual vector is extracted from the subspace of an output only Vibration data covariance matrix within the reference state. The paper describes the application of this damage detection method within a laboratory fatigue test on a Steel frame structure. Aim of the investigation was to analyze the usability and efficiency of the detection method for realistic damage on carrying structures of wind energy turbines. In a second Step, a numerical model of the lab test structure is developed and validated. Thus, a comparableAltematively to common modal analysis as tool for detectmg changes between a reference and an actual (possibly damaged) structural state, the subspace-based damage detection method has been developed in recent years and successfully adopted to test application data sets. Characteristic for that method is that instead of analyzing modal parameters, a Statistical test with respect to changes of a dynamic signature of structural response is introduced. Therefor, a Gaussian residual vector is extracted from the subspace of an output only Vibration data covariance matrix within the reference state. The paper describes the application of this damage detection method within a laboratory fatigue test on a Steel frame structure. Aim of the investigation was to analyze the usability and efficiency of the detection method for realistic damage on carrying structures of wind energy turbines. In a second Step, a numerical model of the lab test structure is developed and validated. Thus, a comparable numerical Simulation of the fatigue damage detection was feasible and the accuracy of the Simulation procedure could be verified. The present study describes the first Step in a two-step approach for quantifying and optimizing fundamental characteristics of SHM Systems for offshore wind turbine structures concerning a required number of sensors and their optimal location.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Falk Hille, Y. Petryna, Werner Rücker
Persönliche Herausgeber/innen:A. Cunha, E. Caetano, P. Ribeiro, G. Müller
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):EURODYN 2014 - 9th International conference on structural dynamics (Proceedings)
Jahr der Erstveröffentlichung:2014
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.2 Ingenieurbau
Erste Seite:MS25, 3595
Letzte Seite:3602
Freie Schlagwörter:Damage detection; Offshore wind energy; Offshore-Windenergie; Schadensdetektion; Subspace-based detection; Subspace-basierte Verfahren
Veranstaltung:EURODYN 2014 - 9th International conference on structural dynamics
Veranstaltungsort:Porto, Portugal
Beginndatum der Veranstaltung:30.06.2014
Enddatum der Veranstaltung:02.07.2014
URL:http://paginas.fe.up.pt/~eurodyn2014//CD/papers/506_MS25_ABS_1788.pdf
ISSN:2311-9020
ISBN:978-972-752-165-4
Verfügbarkeit des Volltexts:Volltext-PDF im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:25.08.2014