Investigation on the sensitivity of flexible foundation models of an offshore wind turbine under earthquake loadings

Yang, Yang; Li, Chun; Bashir, Musa; Wang, Jin; Yang, Chen

doi:10.1016/j.engstruct.2019.01.050

Cited by 33 publications

(9 citation statements)

References 53 publications

(57 reference statements)

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“…Fig. 4 presents the tower-top displacements of the NREL 5 MW monopile OWT [23] obtained by Bladed and SCASCA, respectively, for different earthquake loadings. For each of the simulations, the earthquake is assumed to occur at the 20 th s. To avoid the influence of the difference between FAST and Bladed in predicting aerodynamic loads, the wind turbine is only subjected to the earthquake loading.…”

Section: Fig 2: Schematic Diagram Of Tmd Locationmentioning

confidence: 99%

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Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine

Yang

Bashir

et al. 2020

Renewable Energy

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Section: Fig 2: Schematic Diagram Of Tmd Locationmentioning

confidence: 99%

“…The SSI effect was examined using the linear coupled-springs model. Yang et al [23][24] investigated the linear and nonlinear SSI effects on the seismic behaviour of a 5 MW OWT using a newly developed numerical tool based on FAST. The dominance of wind, wave and earthquake loadings was discussed for the 5 MW wind turbine.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine

Yang

Bashir

et al. 2020

Renewable Energy

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“…For each harmonic, the wave kinematics are modeled using Airy wave theory, which can solve the velocity and acceleration of water particle. The velocity of the water particle in the horizontal direction is given by [31].…”

Section: ) Wave Loadsmentioning

confidence: 99%

Real-Time Performance Analyses and Optimal Gain-Scheduling Control of Offshore Wind Turbine Under Ice Creep Loads

Song

Liu

et al. 2019

IEEE Access

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At high latitudes, offshore wind turbines often face unfavorable loads by severe ice-induced vibrations during winter season, which may endanger facilities available on the platforms and degrade operating performance of wind turbine. Hence, it is vital to analyze the influences caused by ice loads. In this paper, based on a real-time simulation model, quantifiable analyses of performance losses due to ice creep loads are firstly studied deeply. Under ice creep loads, reliable pitch control is necessary to ensure safety and high-level power-tracking capability of modern offshore wind turbine. However, uncertain influences of ice creep loads are coupled with wind turbine operation and make it a challenge for wind turbine pitch control using traditional Proportional-Integral (PI) controller from the view of industry. As a result, improved pitch control using optimal gain-scheduling strategy is proposed to alleviate impacts of ice loads where the support vector regression algorithm is adopted to represent the strong nonlinear relationship among PI parameters under different operation conditions. For each operation point, PI parameters are optimally tuned by the particle swarm optimization algorithm. Finally, the presented nonlinear optimal gain-scheduling PI (OGS-PI) controller is applied on regulating generation power and reducing tower top displacement caused by ice creep loads based on software of Fatigue, Aerodynamics, Structures, and Turbulence, a high-fidelity wind turbine simulator. Simulation results show that unfavorable influence of ice creep loads to wind turbine operation can be significantly alleviated by the OGS-PI controller, which performs much better than the traditional PI controller. INDEX TERMS Offshore wind turbine, ice loads, gain-scheduling control, optimal control, real-time.

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“…In Ref. [10][11][12][13], Asareh and Prowell selected FAST as a design basis, developed a seismic module to examine the coupled effect of wind and seismic loads， and employed an improved FAST (also known as NREL Seismic) to investigate the relationship between seismic intensity and structural response. Additionally, in Ref.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Transient Dynamics of Large-Scale Offshore Wind Turbines with Different Foundation Structure under Seismic

Wang¹,

Yue²,

Li³

et al. 2022

Rotating Machines

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In this paper, a structural dynamic response comparison between jacket foundation large-scale offshore wind turbines (OWTs) and monopile ones under wind and seismic loads is demonstrated. The interaction between flexible soil and pile foundation is described by Winkler soil-structure interaction (SSI) model. The National Renewable Energy Laboratory (NREL) 5 MW large-scale OWT is studied via the finite element model. The structural transient dynamic response of these two structures under normal operating conditions at rated wind speed and earthquake is calculated. The results show that under the action of seismic and turbulent wind, the jacket has better wind and seismic resistance, and the displacement of the top of the tower is small, which can effectively protect the blades and the nacelle. Compared with monopile, the range of the Mises equivalent stress amplitude of the jacket wind turbine was reduced and the average value was decreased at the time of the seismic. The study also found that the existing jacket design will have a local strain energy surge.

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Investigation on the sensitivity of flexible foundation models of an offshore wind turbine under earthquake loadings

Cited by 33 publications

References 53 publications

Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine

Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine

Real-Time Performance Analyses and Optimal Gain-Scheduling Control of Offshore Wind Turbine Under Ice Creep Loads

Comparative Analysis of Transient Dynamics of Large-Scale Offshore Wind Turbines with Different Foundation Structure under Seismic

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