Influence of floater response on wind turbine tower moments in floating wind turbine system

Muhammad Bilal Waris, Takeshi Ishihara

Research output: Contribution to conferencePaperpeer-review

Abstract

The study uses finite element modeling to discuss the effect of floater response on tower moments in a floating offshore wind turbine system. A semi-submersible floating platform supporting a single NREL-5MW wind turbine was investigated. In order to understand the contribution of different modes of floater motion to tower load, tension leg mooring and catenary mooring were used. The mooring systems were designed to provide similar dynamic response amplitude in surge, while the pitch response was inherently different. Wind and wave loads were considered separately and then together to identify their respective contribution to response and tower loads. Both wind and wave loads were found to be critical for tower base moment while wind loads govern the tower top moments. In comparison with catenary mooring, the tension leg mooring was found to reduce the tower base moment by up to 50 % at higher wind speeds due to restraint to pitch motion. The two types of mooring provided a similar tower top moment which indicates it is independent of pitch motion.

Original languageEnglish
Pages2700-2710
Number of pages11
DOIs
Publication statusPublished - 2015
Event5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015 - Hersonissos, Crete, Greece
Duration: May 25 2015May 27 2015

Conference

Conference5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015
Country/TerritoryGreece
CityHersonissos, Crete
Period5/25/155/27/15

Keywords

  • Coupled system
  • FEM
  • Floating wind turbine
  • Tower moment

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Computational Mathematics
  • Geotechnical Engineering and Engineering Geology

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