Multi-hazard response analysis of a 5MW offshore wind turbine

Evangelos Katsanos, A. Arrospide Sanz, Christos T. Georgakis, Sebastian Thöns

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Wind energy has already dominant role on the scene of the clean energy production. Well-promising markets, like China, India, Korea and Latin America are the fields of expansion for new wind turbines mainly installed in offshore environment, where wind, wave and earthquake loads threat the structural integrity and reliability of these energy infrastructures. Along these lines, a multi-hazard environment was considered herein and the structural performance of a 5 MW offshore wind turbine was assessed through time domain analysis. A fully integrated model of the offshore structure consisting of the blades, the nacelle, the tower and the monopile was developed with the use of an aeroelastic code considering the interaction between the elastic and inertial forces, developed in the structure, as well as the generated aerodynamic and hydrodynamic forces. Based on the analysis results, the dynamic response of the turbine’s tower was found to be severely affected by the earthquake excitations. Moreover, fragility analysis based on acceleration capacity thresholds for the nacelle’s equipment corroborated that the earthquake excitations may adversely affect the reliability and availability of wind turbines.
Original languageEnglish
JournalProcedia Engineering
Pages (from-to)3206-3211
Publication statusPublished - 2017
EventX International Conference on Structural Dynamics - Sapienza University of Rome, Rome, Italy
Duration: 10 Sep 201713 Sep 2017
Conference number: 10


ConferenceX International Conference on Structural Dynamics
LocationSapienza University of Rome


  • Offshore wind turbine
  • Multi-hazard environment
  • Aeroelastic code
  • Earthquake excitations
  • Time-domain analysis
  • Fragility curves

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