Transient response of a SPAR-type floating offshore wind turbine with fractured mooring lines

Li, Yan; Zhu, Qiang; Liu, Liqin; Tang, Yougang

doi:10.1016/j.renene.2018.01.067

Cited by 59 publications

(21 citation statements)

References 38 publications

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“…where F buoy is the buoyancy of the articulated foundation, l b is the moment arm of buoyancy to the hinged joint, M is the total mass of the whole structure, and l g is the moment arm of gravity to the hinged joint. Specifically, according to the previous simulation, we found that the hydrostatic restoring force of the articulated tower was nonlinear [30]. Nevertheless, from the stability curve, the restoring moment curve could be approximately linear when the inclination angle is less than 20 degrees.…”

Section: Restoring Forcesupporting

confidence: 50%

“…In this case, the Boundary Element Momentum (BEM) approach is fairly accurate which was validated in our previous study on the Spar-type FOWT [38]. Its accuracy was validated with both model tests and full-scale tests [39,40], and the numerical module has been proven by comparing with Aerodyn [30]. Meanwhile, when the wave height gets large, the oscillation increases significantly.…”

Section: Of 20mentioning

confidence: 66%

“…The main parameters for each foundation are listed in Table 2. More details about this optimization progress could be found in our previous works [30,31]. Besides, considering the welding of the main structure, subdivision bulkhead, and reinforced aggregate, the equivalent thickness of the foundation is 0.07 m. Hereby, (x, y) is a two-dimensional Cartesian coordinate system with its origin at the bottom of the hinged joint and y pointing upward (see Figure 1b).…”

Section: Physical Problem Descriptionmentioning

confidence: 99%

“…However, there are few studies about the articulated wind turbine; hence, we can hardly compare our results with other works. In fact, this simulation tool was further developed from our previous code for the Spar-type FOWT [30]. The modules in this paper were validated in our previous study [31].…”

Section: Flow Chart Of Simulationmentioning

confidence: 99%

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Dynamic Response of Articulated Offshore Wind Turbines under Different Water Depths

Zhang¹,

Yang²,

Li³

et al. 2020

Energies

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Focusing on the transitional depth offshore area from 50 m to 75 m, types of articulated foundations are proposed for supporting the NREL 5 MW offshore wind turbine. To investigate the dynamic behaviors under various water depths, three articulated foundations were adopted and numerical simulations were conducted in the time domain. An in-house code was chosen to simulate the dynamic response of the articulated offshore wind turbine. The aerodynamic load on rotating blades and the wind pressure load on tower are calculated based on the blade element momentum theory and the empirical formula, respectively. The hydrodynamic load is simulated by 3D potential flow theory. The motions of foundation, the aerodynamic performance of the wind turbine, and the loads on the articulated joint are documented and compared in different cases. According to the simulation, all three articulated offshore wind turbines show great dynamic performance and totally meet the requirement of power generation under the rated operational condition. Moreover, the comparison is based on time histories and spectra among these responses. The result shows that dynamic responses of the shallower one oscillate more severely compared to the other designs.

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Section: Restoring Forcesupporting

confidence: 50%

Section: Of 20mentioning

confidence: 66%

Section: Physical Problem Descriptionmentioning

confidence: 99%

Section: Flow Chart Of Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Response of Articulated Offshore Wind Turbines under Different Water Depths

Zhang¹,

Yang²,

Li³

et al. 2020

Energies

Self Cite

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“…Benassai et al [22] studied the performance changes of the OC4 DeepCWind semisubmersible with one broken mooring line and found that an accidental disconnection of one of the mooring lines changes the platform and turbine orientations, which might cause large nacelle yaw error. Li et al [23] established a coupled aero-hydro-elastic numerical model to investigate the transient response of a spar-type FOWT in scenarios with fractured mooring lines, and they found that in terms of drift distance, it might be more dangerous to shut down the turbine when the wind load is in the opposite direction of drift. Ahmed et al [24] established a simplified three-degrees-of-freedom model to analyze the transient motion of a truss-spar in the time domain after one or two mooring lines were broken.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response for a Submerged Floating Offshore Wind Turbine with Different Mooring Configurations

Ding

et al. 2019

JMSE

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The paper discusses the effects of mooring configurations on the dynamic response of a submerged floating offshore wind turbine (SFOWT) for intermediate water depths. A coupled dynamic model of a wind turbine-tower-floating platform-mooring system is established, and the dynamic response of the platform, tensions in mooring lines, and bending moment at the tower base and blade root under four different mooring configurations are checked. A well-stabilized configuration (i.e., four vertical lines and 12 diagonal lines with an inclination angle of 30°) is selected to study the coupled dynamic responses of SFOWT with broken mooring lines, and in order to keep the safety of SFOWT under extreme sea-states, the pretension of the vertical mooring line has to increase from 1800–2780 kN. Results show that the optimized mooring system can provide larger restoring force, and the SFOWT has a smaller movement response under extreme sea-states; when the mooring lines in the upwind wave direction are broken, an increased motion response of the platform will be caused. However, there is no slack in the remaining mooring lines, and the SFOWT still has enough stability.

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Mechanism of mooring line breakage of floating offshore wind turbine under extreme coherent gust with direction change condition

Zhong

Zhang

et al. 2020

J Mar Sci Technol

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Transient response of a SPAR-type floating offshore wind turbine with fractured mooring lines

Cited by 59 publications

References 38 publications

Dynamic Response of Articulated Offshore Wind Turbines under Different Water Depths

Dynamic Response of Articulated Offshore Wind Turbines under Different Water Depths

Dynamic Response for a Submerged Floating Offshore Wind Turbine with Different Mooring Configurations

Mechanism of mooring line breakage of floating offshore wind turbine under extreme coherent gust with direction change condition

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