Hydrodynamic studies of a 15 MW semisubmersible FOWT to assess the suitability of the inclusion of a damper system

Yu Gao, Chenyu Zhao, Lars Johanning, Ajit C. Pillai

Research output: Contribution to journalConference proceedings published in a journalpeer-review

Abstract

Floating Offshore Wind Turbines can exploit the high energy density experienced in offshore environments, with turbines now reaching up to 15 MW in size. However, given the larger size of these turbines and the environmental conditions they are exposed to, there remain significant challenges in motion stabilization. To overcome these challenges, the inclusion of a damper system could be considered to reduce motions. This paper conducts a numerical hydrodynamic study of a 15 MW semisubmersible floating offshore wind turbine under a range of environmental conditions, informing the design criteria for the damper system. The study presents both findings in the time- and frequency-domain. In the first instance the time-domain was used to determine the dominant motion characteristics. The initial study identified that the pitch motion is of main concern. As a consequence, in the frequency-domain study the focus is given to the pitch motion. Excitation modes were observed at both, eigenfrequency and excitation frequency, dependent on wave conditions. Within the discussion a dual damper system is suggested to increase stability of the platform.

Original languageEnglish
JournalProceedings of the European Wave and Tidal Energy Conference
DOIs
Publication statusPublished - 2023
Externally publishedYes
Event15th European Wave and Tidal Energy Conference, EWTEC 2023 - Bilbao, Spain
Duration: 3 Sept 20237 Sept 2023

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Water Science and Technology
  • Energy Engineering and Power Technology
  • Ocean Engineering

Keywords

  • damper system
  • Floating offshore wind turbine
  • hydrodynamic analysis
  • Orcaflex

Fingerprint

Dive into the research topics of 'Hydrodynamic studies of a 15 MW semisubmersible FOWT to assess the suitability of the inclusion of a damper system'. Together they form a unique fingerprint.

Cite this