Static and dynamic loading behavior of a hybrid foundation for offshore wind turbines

Chen, Da; Gao, Peng; Huang, Shanshan; Li, Chousheng; Yu, Xiangang

doi:10.1016/j.marstruc.2020.102727

Cited by 68 publications

(12 citation statements)

References 34 publications

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“…To eliminate the boundary effects, a considerable zone of soil is generated with a height of 30 m, length of 60 m and width of 30 m [27,28]. Different from previous studies [29,30], this paper not only focuses on the deflection of monopile under the maximum wave and current load, but also analyzes the displacement variation during a wave-current action cycle. Under the above environmental conditions, the time domain response of the monopile foundation under wave load is calculated and shown in Figure 6.…”

Section: Response Of Monopile Foundation Under Extreme Marine Conditionmentioning

confidence: 99%

Numerical Analysis of the Deformation Performance of Monopile under Wave and Current Load

Chen

Yang

et al. 2020

Energies

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The research on the deformation mechanism of monopile foundation supporting offshore wind turbines is significant to optimize the design of a monopile foundation under wave and current load. In this paper, a three-dimensional wave-pile-soil coupling finite element model is proposed to investigate the deformation mechanism of monopile undercurrent and fifth-order Stokes wave. Different from the conventional assumption that there is no slip at the pile-soil interface, Frictional contact is set to simulate the relative movement between monopile and soil. Numerical results indicate that under extreme environmental conditions, the monopile foundation sways within a certain range and the maximum displacement in the loading direction is 1.3 times the displacement in the reverse direction. A further investigation has been made for a large-diameter pipe pile with various design parameters. The finite element analyses reveal that the most efficient way to reduce the deflection of the pile head is by increasing the embedment depth of the monopile. When the embedment depth is limited, increasing the pile diameter is a more effective way to strengthen the foundation than increasing the wall thickness.

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Section: Response Of Monopile Foundation Under Extreme Marine Conditionmentioning

confidence: 99%

Numerical Analysis of the Deformation Performance of Monopile under Wave and Current Load

Chen

Yang

et al. 2020

Energies

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“…The nonlinearity of the waves and the depth of the water are two keywords in the hydrodynamic analysis for fixed and floating wind turbines since offshore wind farms are generally implanted in areas of relatively shallow water, where the waves become more non-linear and lead to a considerable increase in hydrodynamic loads [30]. Cheng et al [31] analysed a numerical model with second-order wave effects for aero-hydrodynamic analysis of floating offshore wind turbines. Marino et al [32] evaluated the structural response of an offshore wind turbine subjected to two wave models: linear and non-linear, and observed that when the turbine is parked, the linear wave modelling approach significantly underestimates fatigue loads.…”

Section: Wavesmentioning

confidence: 99%

A brief review of fatigue design criteria on offshore wind turbine support structures

Mendes

Correia

Jesus

et al. 2020

Frattura Ed Integrità Strutturale

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In this paper, a brief review of the main fatigue design criteria and some advanced fatigue approaches applied to offshore structures (e.g. offshore wind turbines) are presented. It is extremely important to understand the fatigue phenomenon and how it affects structures since offshore structures are constantly submitted to cyclic loading and corrosive attacks that aggravate the problem. All the influencing factors and approaches used during the design phase are also discussed.

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“…For the soil with poor drainage capacity, the reduction of soil shear modulus caused by residual pore water pressure should be considered [23]. Chen et al [24] proposed a hybrid foundation which composed the monopile and wide-shallow bucket, and concluded that the cylindrical platform of this foundation can effectively share the horizontal loading and bending moment of monopile foundation, which is better than the monopile foundation in anti-overturning capacity.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and Residual Pore Water Pressure Response of Hybrid Foundation System Under Combined Action of Wind, Wave and Seismic Loading

Jiang¹,

Dong-hui²,

Fan³

et al. 2022

Period. Polytech. Civil Eng.

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The dynamic response characteristics of the innovative marine wind power hybrid foundation under combined action of wind, wave and seismic loading are studied in this article. Taking the monopile foundation as reference group, the shearing strain-volumetric strain coupled pore pressure incremental constitutive model was utilized to simulate the kinetic behavior of seabed’s saturated soil. The pressure distribution and variation characteristics of residual pore water pressure around pile foundation due to the interactions of upper structure, foundation and saturated soil are illustrated. The results indicate that: (a) the cylindrical platform changes the residual pore water pressure and accelerates the pressure accumulation area, which converts from surrounding the monopile to nearby the cylindrical platform; (b) compared to the hybrid foundation, the peak value of residual pore water accumulation of the monopile foundation is smaller only under seismic loading, which is due to that the monopole with smaller stiffness is more vulnerable to deform with soil synergistically; (c) the cylindrical platform structure can significantly reduce the horizontal placement extreme of pile foundation under the action of dynamic load, and can also change the distribution characteristics of bending moment of middle pile of the hybrid foundation. It is manifested by a lower bending moment extreme of the middle pile near the mudline under the action of wind and wave loading, while the seismic loading could increase the bending moment extreme of middle pile near the mudline.

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Static and dynamic loading behavior of a hybrid foundation for offshore wind turbines

Cited by 68 publications

References 34 publications

Numerical Analysis of the Deformation Performance of Monopile under Wave and Current Load

Numerical Analysis of the Deformation Performance of Monopile under Wave and Current Load

A brief review of fatigue design criteria on offshore wind turbine support structures

Dynamic and Residual Pore Water Pressure Response of Hybrid Foundation System Under Combined Action of Wind, Wave and Seismic Loading

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