Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modelling

Wang, Xuefei; Zeng, Xin; Yang, Xu; Li, Jiale

doi:10.1016/j.apenergy.2018.11.057

Cited by 64 publications

(19 citation statements)

References 41 publications

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“…A set of 12 wind files in time during of 600 s with different V hub from 3 m/s to 25 m/s were simulated by using the program TurbSim [49] and then used as the input files in the calculation program of FAST. According to equations (16) and (18), the distribution of each normal mean wind speed with different height and turbulence intensity with different V hub are shown in Figures 3 and 4, respectively.…”

Section: Excitation Loads and Specified Critical Levelsmentioning

confidence: 99%

“…Santangelo et al [17] investigated a time-domain implementation of uncoupled analyses for seismic assessment of wind turbines in operating conditions. Wang et al [18] investigated the seismic response of largecapacity wind turbine through a series of centrifuge tests. Wang et al [19] studied the dynamic responses of offshore wind turbine supported on monopile foundation subjected to wind, wave, and earthquake actions based on the opensource software platform OpenSees.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Influence of Baseline Control System on the Fragility of Large‐Scale Wind Turbine considering Seismic‐Aerodynamic Combination

Yuan

Chen

et al. 2020

Advances in Civil Engineering

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The purpose of this paper is to explore the effect of the baseline control system (BCS) on the fragility of large-scale wind turbine when seismic and wind actions are considered simultaneously. The BCS is used to control the power output by regulating rotor speed and blade-pitch angle in real time. In this study, the fragility analysis was performed and compared between two models using different peak ground acceleration, wind speeds, and specified critical levels. The fragility curves with different wind conditions are obtained using the multiple stripe analysis (MSA) method. The calculation results show that the probability of exceedance specified critical level increases as the wind speed increases in model 1 without considering BCS, while does not have an obvious change in the below-rated wind speed range and has a significant decrease in the above-rated wind speed range in model 2 with considering BCS. The comparison depicts that if the BCS is neglected, the fragility of large-scale wind turbine will be underestimated in around the cut-in wind speed range and overestimated in the over-rated wind speed range. It is concluded that the BCS has a great effect on the fragility especially within the operating conditions when the rated wind speed is exceeded, and it should be considered when estimating the fragility of wind turbine subjected to the interaction of seismic and aerodynamic loads.

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Section: Excitation Loads and Specified Critical Levelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Baseline Control System on the Fragility of Large‐Scale Wind Turbine considering Seismic‐Aerodynamic Combination

Yuan

Chen

et al. 2020

Advances in Civil Engineering

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“…Hao et al carried out dynamic centrifugal model tests on the tripod foundation and found that it has better resistance to liquefaction than the common monopile one [75]. Wang et al proposed a new hybrid monopile foundation, also based on centrifugal tests, and found that the mixed foundation has smaller lateral displacement and enhanced liquefaction resistance than ordinary monopile foundations [73,74]. General views of these two alternatives are illustrated in Figure 6.…”

Section: Flexible Installation Unstable Foundation and A Little High Costmentioning

confidence: 99%

Features of Earthquake-Induced Seabed Liquefaction and Mitigation Strategies of Novel Marine Structures

Huang

Han

2020

JMSE

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With the accelerated development of marine engineering, a growing number of marine structures are being constructed (e.g., seabed pipelines, drilling platforms, oil platforms, wind turbines). However, seismic field investigations over recent decades have shown that many marine structures were damaged or destroyed due to liquefaction. Seismic liquefaction in marine engineering can have huge financial repercussions as well as a devastating effect on the marine environment, which merits our great attention. As the effects of seawater and the gas component in the seabed layers are not negligible, the seabed soil layers are more prone to liquefaction than onshore soil layers, and the liquefied area may be larger than when liquefaction occurs on land. To mitigate the impact of liquefaction events on marine engineering structures, some novel liquefaction-resistant marine structures have been proposed in recent years. This paper reviews the features of earthquake-induced liquefaction and the mitigation strategies for marine structures to meet the future requirements of marine engineering.

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“…Most of the existing offshore wind turbines (OWTs) use monopile foundations and are installed in water depths less than 50 m. However, for larger turbines in deeper waters, monopiles become very large and increasingly uneconomical due to the difficulty of fabricating and installing such systems, as well as the consideration of modal requirements. More information on monopile foundations can be found in Wang et al 8,9 To address these issues, space frame structures such as jackets are used, which have lighter weight and are stiffer than monopiles. Space frames can be cheaper in deep‐water circumstances, and hence, they can contribute to the offshore wind industry's goal on the reduction of levelized cost of energy (LCoE).…”

Section: Introductionmentioning

confidence: 99%

Structural reliability assessment of offshore wind turbine support structures subjected to pitting corrosion‐fatigue: A damage tolerance modelling approach

et al. 2020

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The structural integrity of offshore wind turbine (OWT) support structures is affected by one of the most severe damage mechanisms known as pitting corrosion-fatigue. In this study, the structural reliability of such structures subjected to pitting corrosion-fatigue is assessed using a damage tolerance modelling approach. A probabilistic model that ascertains the reliability of the structure is presented, incorporating the randomness in cyclic load and corrosive environment as well as uncertainties in shape factor, pit size and aspect ratio. A non-intrusive formulation is proposed consisting of a sequence of steps. First, a stochastic parametric Finite Element Analysis (FEA) is performed using SMART© crack growth and Design Xplorer© facilities within the software package ANSYS. Secondly, the results obtained from the FEA are processed using an Artificial Neural Network (ANN) response surface modelling technique. Finally, the First Order Reliability Method (FORM) is used to calculate the reliability indices of components. The results reveal that for the inherent stochastic conditions, the structure becomes unsafe after the 18th year, before the attainment of the design life of 20 years. The FEA results are in very good agreement with results obtained from analysis steps outlined in design standard BS 7910 and other references designated as 'theoretical analysis methods' in this study. The results predict, for the case study, that the pit growth life is approximately 56% of the total pitting corrosion fatigue life. Sensitivity analysis results show that the aspect ratio of pits at critical size plays a significant role on the reliability of the structure.

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Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modelling

Cited by 64 publications

References 41 publications

Study on the Influence of Baseline Control System on the Fragility of Large‐Scale Wind Turbine considering Seismic‐Aerodynamic Combination

Study on the Influence of Baseline Control System on the Fragility of Large‐Scale Wind Turbine considering Seismic‐Aerodynamic Combination

Features of Earthquake-Induced Seabed Liquefaction and Mitigation Strategies of Novel Marine Structures

Structural reliability assessment of offshore wind turbine support structures subjected to pitting corrosion‐fatigue: A damage tolerance modelling approach

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