Observed Dynamic Soil-Structure Interaction in scale testing of Offshore Wind Turbine Foundations
Subhamoy Bhattacharya,Nikolaos Nikitas,J. Garnsey,Nicholas A Alexander,James A. Cox,Domenico Lombardi,D. Muir Wood,D.F.T. Nash +7 more
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TL;DR: In this paper, a series of small scaled tests (1:100, 1:150 and 1:200) of a complete National Renewable Energy Laboratory (NREL) wind turbine model on three types of foundations: monopiles, symmetric tetrapod and asymmetric tripods were applied.
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About: This article is published in Soil Dynamics and Earthquake Engineering. The article was published on 01 Nov 2013. and is currently open access. The article focuses on the topics: Shallow foundation & Offshore wind power.
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Figures
Figure 14: Relationship between effect of natural frequency of suction caisson and monopile on the forcing frequencies 
Figure 1: A schematic diagram showing different types of foundations: (a) monopile; (b) tetrapod; (c) Asymmetric tripod 
Figure 13: Lumped mass modelling of the tetrapod and tripod foundation solutions. For the two different cases, the influence of elastic foundations is inherently different along the two principal vibration axes. 
Table 5: Mass distribution of the differently scaled models (see Table 4). 
Figure 7: Cumulative results for snap-back test on the tetrapod supported wind turbine model on sand 
Figure 2: Forcing frequencies plotted against the power spectral densities for a 3 bladed NREL standard 5W Wind turbine. 3P stands for blade passing frequency
Citations
Design of monopiles for offshore wind turbines in 10 steps
TL;DR: In this paper, a simplified way of carrying out the design of monopiles based on necessary data (i.e. the least amount of data), namely site characteristics (wind speed at reference height, wind turbulence intensity, water depth, wave height and wave period), turbine characteristics (rated power, rated wind speed, rotor diameter, cut-in and cut-out speed, mass of the rotor-nacelle-assembly) and ground profile (soil stiffness variation with depth and soil stiffness at one diameter depth).
333
A Comparative Study of Multiple-Criteria Decision-Making Methods under Stochastic Inputs
TL;DR: In this paper, a comparative study is carried out among well-known and widely-applied methods in MCDM, when applied to the reference problem of the selection of wind turbine support structures for a given deployment location.
A review of foundations of offshore wind energy convertors: Current status and future perspectives
TL;DR: In this article, a review of foundations for offshore wind energy convertors considering the significant growth of offshore wind power since the early 2000s is presented, where the characteristics of various foundation types (i.e., gravity, pile, suction caisson, and float type) and current status of field application are discussed.
227
Closed form solution of Eigen frequency of monopile supported offshore wind turbines in deeper waters incorporating stiffness of substructure and SSI
TL;DR: In this article, the Euler-Bernoulli and Timoshenko beam theory is used to obtain the first natural frequency of the whole system using only limited data on the WTG (Wind Turbine Generator), tower dimensions, monopile dimensions and the ground.
225
A review on recent advancements of substructures for offshore wind turbines
TL;DR: In this article, a comprehensive review of variable types of offshore wind substructures associate with their corresponding example projects is presented, complemented with a special attention to a novel foundation, namely suction bucket foundation.
189
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Dynamic soil–structure interaction of monopile supported wind turbines in cohesive soil
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