Evolution of modal parameters of composite wind turbine blades under short- and long-term forced vibration tests

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dc.coverageDOI: 10.1007/s13349-024-00773-1
dc.creatorGutiérrez, José M.
dc.creatorAstroza, Rodrigo
dc.creatorJaramillo, Francisco
dc.creatorOrchard, Marcos
dc.creatorGuarini, Marcelo
dc.date2024
dc.date.accessioned2025-11-18T19:43:01Z
dc.date.available2025-11-18T19:43:01Z
dc.description<p>Modal properties of dynamically tested wind turbine blades (WTBs) of a utility-scale wind turbine are identified. A comprehensive experimental program including free vibration and short- and long-term forced vibrations representing resonance and simplified fatigue conditions was carried out to investigate vibration-based features for damage diagnosis and prognosis. A set of 12 undamaged WTBs were tested to study the variability of the identified modal parameters. Results indicate that the variability of the natural frequencies was rather low, while the obtained damping ratios exhibited significant differences. Forced vibration tests were then conducted. To reach the failure of the blades, approximately 1.9 × 10<sup>4</sup> and 4.2 × 10<sup>7</sup> cycles were induced in the short- and long-term tests, respectively. Modal properties identified during testing protocols suggest that natural frequencies correlate well with damage. A linear finite element model was also developed, and its modal properties are compared to the identified modal parameters of the undamaged blades.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/29ea6b82-709e-455e-8cb2-68cdb999ea55
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/52645
dc.languageeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcevol.14 (2024) nr.4 p.1059-1074
dc.subjectDamage
dc.subjectFatigue
dc.subjectModal properties
dc.subjectResonance
dc.subjectSystem identification
dc.subjectWind turbine blades
dc.titleEvolution of modal parameters of composite wind turbine blades under short- and long-term forced vibration testseng
dc.typeArticleeng
dc.typeArtículospa
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