Evaluating passive structural control of tidal turbines

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Abstract

The research focus of this project is to design a methodology to reduce fatigue and peak structural loading experienced by support structures used for tidal stream converters. The methodology is based on the dynamic analysis of a towermonopile support structure for offshore wind turbines. A tuned mass damper (TMD) is implemented in the nacelle in fore-aft direction by correcting the discrete equation of motion of a fixed tidal turbine. Parameters such as added mass and viscous damping were thus incorporated in the mass and damping matrix to study the effects of using a TMD on a tidal energy converter. Both frequency and time domain analysis are presented to compare the TMD effect in different conditions. Moreover a sensitivity analysis in soil effect and different tower-monopile shape is presented. The result shows the influence of the TMD for a fixed tidal turbine when the structure suffers an instant impact and under unsteady continuous wave-current coupled forces.
Original languageEnglish
Pages1-8
Number of pages8
Publication statusAccepted/In press - 24 Aug 2016
Event3rd Asian Wave and Tidal Energy Conference - Marina Bay Sands, Singapore, Singapore
Duration: 24 Oct 201628 Oct 2016
Conference number: 3
http://www.awtec.asia/awtec-2016/
https://www.awtec-headoffice.com/awtec-2016

Conference

Conference3rd Asian Wave and Tidal Energy Conference
Abbreviated titleAWTEC 2016
CountrySingapore
CitySingapore
Period24/10/1628/10/16
Internet address

Keywords

  • tidal turbine
  • monopile support
  • tuned mass damper
  • load reduction
  • dynamics

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    Fu, S., Johnstone, C., & Clarke, J. (Accepted/In press). Evaluating passive structural control of tidal turbines. 1-8. Paper presented at 3rd Asian Wave and Tidal Energy Conference, Singapore, Singapore.