Modal Analysis of Wind Turbine Blades with Different Test Setup Configurations

E. Lorenzo, S. Manzato, B. Peeters, V. Ruffini, Peter Berring, Philipp Ulrich Haselbach, Kim Branner, Marcin Luczak

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Modal testing of large structures such as wind turbine blades poses several challenges. Applied test setup configuration, test specimen mounting and measurement equipment are known to affect the test results. This paper presents a comparison study of the modal tests of nominally identical 14.3 m long blades. Blade A was supported in free-free boundary conditions and tested with the Experimental Modal Analysis using accelerometers. Blade B was clamped to a concrete block and tested with Operational Modal Analysis and strain gauges. The modes and corresponding natural frequencies obtained from both test cases were compared and correlated with the numerical models of the blades.
Original languageEnglish
Title of host publicationTopics in Modal Analysis & Testing
EditorsMichael L. Mains, Brandon J. Dilworth
Number of pages10
Place of PublicationCham
Publication date2019
ISBN (Print)978-3-030-12683-4
ISBN (Electronic)978-3-030-12684-1
Publication statusPublished - 2019
EventIMAC-XXXVII Conference and Exposition on Structural Dynamics 2019: It's not just modal anymore - Rosen Plaza Hotel, Orlando, United States
Duration: 28 Jan 201931 Jan 2019
Conference number: 37


ConferenceIMAC-XXXVII Conference and Exposition on Structural Dynamics 2019
LocationRosen Plaza Hotel
Country/TerritoryUnited States
Internet address
SeriesConference Proceedings of the Society for Experimental Mechanics Series


  • Experimental modal analysis
  • Operational modal analysis
  • Strain modal analysis
  • Wind turbine blade
  • Structural dynamics identification


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