Efficient Modelling of Wind Turbine Foundations

Andersen, Lars Vabbersgaard; Clausen, Johan

doi:10.5772/20176

Cited by 6 publications

(6 citation statements)

References 56 publications

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“…In order to evaluate the response of a foundation over a homogeneous ground, a semi‐analytical model based on the DTM and the Green's function may be preferred. The ground is analysed as a horizontal stratum overlying a homogeneous half‐space or bedrock and is modelled as a linear viscoelastic and isotropic material.…”

Section: Computational Model Of a Surface Foundationsupporting

confidence: 82%

Assessment of dynamic substructuring of a wind turbine foundation applicable for aeroelastic simulations

2014

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Dynamic vibration response of a wind turbine structure is examined. Emphasis is put on the dynamic interaction between the foundation and the subsoil, since stiffness and energy dissipation of the substructure affect the dynamic response of the wind turbine. Based on a standard lumped‐parameter model fitted to the frequency response of the ground, a surface foundation is implemented into the aeroelastic code FLEX5. In case of a horizontal stratum overlaying a homogeneous half‐space and within the low frequency range, analyses show that a standard lumped‐parameter model provides an accurate prediction of the frequency‐dependent foundation stiffness. The generalized stiffness matrix of the substructure is found to be in a reasonable agreement with the corresponding values based on a Guyan reduction scheme. In addition, experimental findings based on traditional and operational modal techniques on a Vestas V112‐3.3 MW wind turbine installed on drained soil clearly indicate that the energy dissipation related to the lowest eigenmode is described accurately in the aeroelastic simulation. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Computational Model Of a Surface Foundationsupporting

confidence: 82%

Assessment of dynamic substructuring of a wind turbine foundation applicable for aeroelastic simulations

2014

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“…Higher tower heights are associated with significantly larger actions on the system, implying an increase in complexity in both mechanical and structural design. For an optimized structural design of the towers, 3,4 crucial becomes the study of the foundation system, despite statistically only a minor number of reported collapse cases was associated to inadequacy of foundations 5,6 . Especially referring to wind turbines with steel mast, their foundation system has to sustain cyclically applied large horizontal forces and overturning moments induced by wind load with contemporary moderate vertical load.…”

Section: Introductionmentioning

confidence: 99%

“…For an optimized structural design of the towers, 3,4 crucial becomes the study of the foundation system, despite statistically only a minor number of reported collapse cases was associated to inadequacy of foundations. 5,6 Especially referring to wind turbines with steel mast, their foundation system has to sustain cyclically applied large horizontal forces and overturning moments induced by wind load with contemporary moderate vertical load. Two types of foundation systems are mostly employed for onshore towers 7,8 : truncated-conical shallow foundations, 9,10 eventually combined with piles, 11 or deep monopiles, 12 being the former one the most common solution.…”

Section: Introductionmentioning

confidence: 99%

Experimental tests on shallow foundations of onshore wind turbine towers

Lago

Flessati

Marveggio

et al. 2022

Structural Concrete

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The current effort towards the progressive switch from carbon‐based to renewable energy production is leading to a relevant spreading of both on‐ and off‐shore wind turbine towers. Regarding reinforced concrete shallow foundations of onshore wind turbine steel towers, possible reductions of reinforcement may increase their sustainability, speed of erection, and competitiveness. The article presents the results of an experimental program carried out at Politecnico di Milano concerning both cyclic and monotonic loading, simulating extreme wind conditions on 1:15 scaled models of wind turbine steel towers connected by stud bolt adapters to reinforced concrete shallow foundations embedded in a sandy soil. Three couples of foundation specimens were tested with different reinforcement layouts: (a) similar to current praxis, (b) without shear reinforcement, and (c) without shear reinforcement and with 50% of ordinary steel rebars replaced by steel fibers. Additional vertical loads were added to the small‐scale models in order to ensure similarity in terms of stresses. The test results allowed to (i) characterize the mechanical behavior of the foundation element considering soil‐structure interaction under both service and ultimate load conditions, (ii) assess the foundation failure mode, (iii) highlight the role of each typology of reinforcing bars forming the cage, and (iv) provide hints for the optimization of these latter.

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“…The choice of the foundation structure depends on water depths, condition of the seabed, and the anticipated wind and wave loads at the specific construction site [11]. References [11,12] describe several types of foundation structures in detail, for example, monopiles, gravity base foundations, tripods, or jacket foundations.…”

Section: Offshore Wind Farm Installation Processmentioning

confidence: 99%

Simulation Based Investigation of the Impact of Information Sharing on the Offshore Wind Farm Installation Process

Quandt

Beinke

Alla

et al. 2017

Journal of Renewable Energy

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In the recent decades, the introduction of a sustainable and green energy infrastructure, and, by this, the reduction of emissions caused by fossil energy generation, has been focused on by industry-oriented nations worldwide. Among the technologies of renewable energy generation, wind energy has the highest deployment rate, due to the high wind resource availability and the high technology maturity reached mainly by the onshore installation of wind turbines. However, the planning and the installation of offshore wind farms are a challenging task, because of harsh weather conditions and limited resource availability. Due to the current practice of decentralised information acquisition by the supply chain partners, we investigate the impact of sharing information on the installation process of offshore wind farms by means of a simulation model. Therefore, relevant information items will be identified in order to improve the installation process.

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Efficient Modelling of Wind Turbine Foundations

Cited by 6 publications

References 56 publications

Assessment of dynamic substructuring of a wind turbine foundation applicable for aeroelastic simulations

Assessment of dynamic substructuring of a wind turbine foundation applicable for aeroelastic simulations

Experimental tests on shallow foundations of onshore wind turbine towers

Simulation Based Investigation of the Impact of Information Sharing on the Offshore Wind Farm Installation Process

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