Wave loads on the foundation of a bottom-hinged modular flap structure

Laurie Wilkinson, Kenneth Doherty, Alan Henry, Viviana Russo, Sandy Day, Trevor Whittaker

Research output: Contribution to conferencePaper

Abstract

Large loads result in expensive foundations which are a substantial proportion of the capital cost of flap-type Wave Energy Converters (WECs). Devices such as Oyster 800, currently deployed at the European Marine Energy Centre (EMEC), comprise a single flap for the full width of the machine. Splitting a flap-type device into smaller vertical flap modules, to make a ‘modular-flap’, might reduce the total foundation loads, whilst still providing acceptable performance in terms of energy conversion.
This paper investigates the foundation loads of an undamped modular-flap device, comparing them to those for a rigid flap of an equivalent width. Physical modelling in a wave tank is used, with loads recorded using a six degree of freedom (DoF) load cell. Both fatigue and extreme loading analysis was conducted. The rotations of the flaps were also recorded, using a motion-tracking system.
Original languageEnglish
Publication statusPublished - Sep 2014
EventInternational Conference on Offshore Renewable Energy - Glasgow, United Kingdom
Duration: 15 Sep 201417 Sep 2014

Conference

ConferenceInternational Conference on Offshore Renewable Energy
CountryUnited Kingdom
CityGlasgow
Period15/09/201417/09/2014

Keywords

  • oscillating wave surge converter
  • Wave Energy Converter
  • wave tank
  • modular flap
  • Oyster

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