Now showing1 - 2 of 2
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Dynamic response of a novel reduced draft Spar-type FOWT with anti-motion damping structure(2019-09); ; ; ; With regard to the offshore areas in China, the water depth is limited so that the traditional Spar-type FOWTs are not suitable to be installed in these areas. In this work, we proposed a novel reduced draft Spar-type FOWT with anti-motion damping structure. Simulations are conducted in both frequency and time domain to investigate the dynamic response of the FOWT in different scenarios. Towards this end, a coupled aero-hydro-mooring numerical model is developed. The methodology includes a blade-element-momentum model for aerodynamics, a nonlinear model for hydrodynamics, a nonlinear restoring model of SPAR buoy, and a nonlinear catenary model for mooring cables. The motions of platform, the tensions in the mooring lines and the power generation performance are documented in different cases. The dynamic performance is also compared with the classic Spar-type wind turbine. According to the results, it shows that the reduced draft Spar-type FOWT is effective to support the 5MW baseline offshore wind turbine in the limited water-depth area. The increase in diameter of the motion reducing structure can effectively reduce the motion in pitch and the mooring tension, thereby improving safety and stability of the floating turbine system.Publicationtype: Conference Paper142 220 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Coupled response analysis of an offshore articulated wind turbine under different environmental loads(2019-09); ; ; In this paper, an offshore articulated wind turbine structure is proposed for the water depth of 70 meters. Considering the influence of different environmental factors, the dynamic responses of the structure are studied. Three dimensional potential flow theory was used to calculate the hydrodynamic characteristics of the structure, and the blade element momentum theory was used to calculate the aerodynamic load, the influence of foundation motion, wave surface elevation and friction damping of articulated joint were certainly considered. The control equation in the time domain is set up and the motion response is solved. It is shown that the aerodynamic load has great influence on the average response amplitude, including the average pitch angle, the rotor thrust and the tension of articulated joint. while the wave load is related to the variation of amplitude. The structure will produce a large coupling low-frequency response in the low-frequency range with wave and wind. Especially, under the action of turbulent wind, the coupling effect increases sharply.Publicationtype: Conference Paper146 150