Lifetime Reliability Evaluation of Spar Type Floating Wind Turbine Subjected to Combined Wind-Wave Action

2018 ◽  
Author(s):  
Xuan Li ◽  
Wei Zhang ◽  
Di Wu
Keyword(s):  
Wind Turbine ◽  
Wind Wave ◽  
Reliability Evaluation ◽  
Wave Action ◽  
Floating Wind Turbine ◽  
Lifetime Reliability

scholarly journals Wind-wave coupling effects on the fatigue damage of tendons for a 10 MW multi-body floating wind turbine

2020 ◽  
Vol 217 ◽  
pp. 107909
Author(s):  
Yang Yang ◽  
Musa Bashir ◽  
Jin Wang ◽  
Constantine Michailides ◽  
Sean Loughney ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Fatigue Damage ◽  
Wind Wave ◽  
Coupling Effects ◽  
Wave Coupling ◽  
Floating Wind Turbine ◽  
Multi Body

scholarly journals Optimal Dimensions of a Semisubmersible Floating Platform for a 10 MW Wind Turbine

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3092 ◽  
Author(s):  
Giulio Ferri ◽  
Enzo Marino ◽  
Claudio Borri
Keyword(s):  
Wind Turbine ◽  
Frequency Domain ◽  
Degrees Of Freedom ◽  
Wind Wave ◽  
Radial Distance ◽  
Power Production ◽  
Wave Action ◽  
Response Amplitude ◽  
Simulation Approach ◽  
Floating Platform

In this paper, an optimal semisubmersible platform is sought considering two key geometry variables: the diameter of the outer cylinders and their radial distance from the platform centre. The goal is to identify a platform configuration able to most efficiently contrast the combined wind-wave action, keeping the platform dimensions as small as possible. The amplitude of the Response Amplitude Operator (RAO) peaks and the integral area of the RAOs in a range of excited frequencies for the selected degrees of freedom are chosen as targets to be minimised. Through an efficient frequency domain simulation approach, we show that upscaling techniques proposed in the literature may lead to overdesigned platforms and that smaller and more performing platforms can be identified. In particular, the optimised platform shows a reduction of about 51% in parked and 54% in power production of the heave RAO peak, and a reduction of about 37% in parked and 50% in power production of the pitch RAO.

Model Tests of a Spar-Type Floating Wind Turbine Under Wind/Wave Loads

2015 ◽  
Author(s):  
Fei Duan ◽  
Zhiqiang Hu ◽  
Jin Wang
Keyword(s):  
Wind Turbine ◽  
Model Test ◽  
Wind Wave ◽  
Wave Model ◽  
Offshore Structures ◽  
Model Tests ◽  
Wave Loads ◽  
Scaled Model ◽  
Floating Wind Turbine ◽  
Wave Effects

Wind power has great potential because of its clean and renewable production compared to the traditional power. Most of the present researches for floating wind turbine rely on the hydro-aero-elastic-servo simulation codes and have not been exhaustively validated yet. Thus, model tests are needed and make sense for its high credibility to master the kinetic characters of floating offshore structures. The characters of kinetic responses of the spar-type wind turbine are investigated through model test research technique. This paper describes the methodology for wind/wave model test that carried out at Deepwater Offshore Basin in Shanghai Jiao Tong University at a scale of 1:50. A Spar-type floater was selected to support the wind turbine in this test and the model blade was geometrically scaled down from the original NREL 5 MW reference wind turbine blade. The detail of the scaled model of wind turbine and the floating supporter, the test set-up configuration, the mooring system, the high-quality wind generator that can create required homogeneous and low turbulence wind, and the instrumentations to capture loads, accelerations and 6 DOF motions are described in detail, respectively. The isolated wind/wave effects and the integrated wind-wave effects on the floating wind turbine are analyzed, according to the test results.

Additional Wind/Wave Basin Testing of the DeepCwind Semi-Submersible With a Performance-Matched Wind Turbine

2014 ◽  
Author(s):  
Andrew J. Goupee ◽  
Matthew J. Fowler ◽  
Richard W. Kimball ◽  
Joop Helder ◽  
Erik-Jan de Ridder
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Wave ◽  
Full Scale ◽  
Floating Wind Turbine ◽  
Wave Basin ◽  
Global Performance ◽  
Thrust Forces ◽  
A Performance

In 2011 the DeepCwind Consortium, led by the University of Maine (UMaine), performed an extensive series of floating wind turbine model tests at the Maritime Research Institute Netherlands (MARIN) offshore basin. These tests, which were conducted at 1/50th scale, investigated the response of three floating wind turbine concepts subjected to simultaneous wind and wave environments. The wind turbine blades utilized for the tests were geometrically-similar models of those found on the National Renewable Energy Laboratory (NREL) 5 MW reference wind turbine and performed poorly in the Froude-scaled, low-Reynolds number wind environment. As such, the primary aerodynamic load produced by the wind turbine, thrust, was drastically lower than expected for a given Froude-scaled wind speed. In order to obtain appropriate mean thrust forces for conducting the global performance testing of the floating wind turbines, the winds speeds were substantially raised beyond the target Froude-scale values. While this correction yielded the desired mean thrust load, the sensitivities of the thrust force due to changes in the turbine inflow wind speed, whether due to wind gusts or platform motion, were not necessarily representative of the full-scale system. In hopes of rectifying the wind turbine performance issue for Froude-scale wind/wave basin testing, efforts have been made by UMaine, Maine Maritime Academy and MARIN to design performance-matched wind turbines that produce the correct thrust forces when subjected to Froude-scale wind environments. In this paper, an improved, performance-matched wind turbine is mounted to the DeepCwind semi-submersible platform investigated in 2011 (also studied in the International Energy Association’s OC4 Phase II Project) and retested in MARIN’s offshore basin with two major objectives: 1) To demonstrate that the corrective wind speed adjustments made in the earlier DeepCwind tests produced realistic global performance behaviors and 2) To illustrate the increased capability for simulating full-scale floating wind turbine responses that a performance-matched turbine has over the earlier, geometrically-similar design tested. As an example of this last point, this paper presents select results for coupled wind/wave tests with active blade pitch control made possible with the use of a performance-matched wind turbine. The results of this paper show that the earlier DeepCwind tests produced meaningful data; however, this paper also illustrates the immense potential of using a performance-matched wind turbine in wind/wave basin model tests for floating wind turbines.

Fluid-structure interaction and stress analysis of a floating wind turbine

2021 ◽  
Vol 78 ◽  
pp. 102970
Author(s):  
B. Wiegard ◽  
M. König ◽  
J. Lund ◽  
L. Radtke ◽  
S. Netzband ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Stress Analysis ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Floating Wind Turbine

A novel conceptual design of a dynamically positioned floating wind turbine

2021 ◽  
Vol 221 ◽  
pp. 108528
Author(s):  
Shengwen Xu ◽  
Motohiko Murai ◽  
Xuefeng Wang ◽  
Kensaku Takahashi
Keyword(s):  
Wind Turbine ◽  
Conceptual Design ◽  
Floating Wind Turbine
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