Experimental and Operational Modal Analysis of Wind Turbine Blades During Fatigue Testing

M.M. Luczak, R. Riva, S.C. Yeniceli, S.H. Madsen, E. di Lorenzo, B. Peeters

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review


Fatigue testing is a mandatory stage of the blade certification process. During the test, the blade is mounted on the block, and instrumented with heavy excitation equipment, a large number of sensors and cables. It is thus important to assess the impact of this equipment on the blade modes.This paper presents a comprehensive parametric study of the experimental and operational modal analysisperformed before and during fatigue testing. First, for reference purposes, the modal analysis of the intact, clean, blade has been performed. Next, the fatigue test has been conducted, by exciting the blade for two million cycles in flapwise, and another two million in edgewise. The modal properties of the blade have been measured at regular intervals, to track the evolution of the damage.
Original languageEnglish
Publication date2020
Number of pages4
Publication statusPublished - 2020
EventIMAC XXXVIII: Space Technologies for Humanity - Hyatt Regency Houston, Houston, United States
Duration: 10 Feb 202013 Feb 2020
Conference number: 38


LocationHyatt Regency Houston
CountryUnited States
Internet address


  • Wind turbine blade
  • Experimental modal analysis
  • Operational modal analysis
  • Fatigue testing
  • Damping

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