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.
|Number of pages||8|
|Publication status||Accepted/In press - 24 Aug 2016|
|Event||3rd Asian Wave and Tidal Energy Conference - Marina Bay Sands, Singapore, Singapore|
Duration: 24 Oct 2016 → 28 Oct 2016
Conference number: 3
|Conference||3rd Asian Wave and Tidal Energy Conference|
|Abbreviated title||AWTEC 2016|
|Period||24/10/16 → 28/10/16|
- tidal turbine
- monopile support
- tuned mass damper
- load reduction
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.