Evaluating passive structural control of tidal turbines

Research output: Contribution to conferencePaper

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.

Conference

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

Fingerprint

Turbines
Damping
Offshore wind turbines
Frequency domain analysis
Time domain analysis
Dynamic analysis
Towers
Sensitivity analysis
Equations of motion
Fatigue of materials
Soils

Keywords

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

Cite this

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.
Fu, Song ; Johnstone, Cameron ; Clarke, Joe. / Evaluating passive structural control of tidal turbines. Paper presented at 3rd Asian Wave and Tidal Energy Conference, Singapore, Singapore.8 p.
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Fu, S, Johnstone, C & Clarke, J 2016, 'Evaluating passive structural control of tidal turbines' Paper presented at 3rd Asian Wave and Tidal Energy Conference, Singapore, Singapore, 24/10/16 - 28/10/16, pp. 1-8.

Evaluating passive structural control of tidal turbines. / Fu, Song; Johnstone, Cameron; Clarke, Joe.

2016. 1-8 Paper presented at 3rd Asian Wave and Tidal Energy Conference, Singapore, Singapore.

Research output: Contribution to conferencePaper

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N1 - (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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AB - 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.

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Fu S, Johnstone C, Clarke J. Evaluating passive structural control of tidal turbines. 2016. Paper presented at 3rd Asian Wave and Tidal Energy Conference, Singapore, Singapore.