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Natural frequency of bottom-fixed offshore wind turbines considering pile-soil-interaction with material uncertainties and scouring depth
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  • Journal title : Wind and Structures
  • Volume 21, Issue 6,  2015, pp.625-639
  • Publisher : Techno-Press
  • DOI : 10.12989/was.2015.21.6.625
 Title & Authors
Natural frequency of bottom-fixed offshore wind turbines considering pile-soil-interaction with material uncertainties and scouring depth
Yi, Jin-Hak; Kim, Sun-Bin; Yoon, Gil-Lim; Andersen, Lars Vabbersgaard;
 Abstract
Monopiles have been most widely used for supporting offshore wind turbines (OWTs) in shallow water areas. However, multi-member lattice-type structures such as jackets and tripods are also considered good alternatives to monopile foundations for relatively deep water areas with depth ranging from 25-50 m owing to their technical and economic feasibility. Moreover, jacket structures have been popular in the oil and gas industry for a long time. However, several unsolved technical issues still persist in the utilization of multi-member lattice-type supporting structures for OWTs; these problems include pile-soil-interaction (PSI) effects, realization of dynamically stable designs to avoid resonances, and quick and safe installation in remote areas. In this study, the effects of PSI on the dynamic properties of bottom-fixed OWTs, including monopile-, tripod- and jacket-supported OWTs, were investigated intensively. The tower and substructure were modeled using conventional beam elements with added mass, and pile foundations were modeled with beam and nonlinear spring elements. The effects of PSI on the dynamic properties of the structure were evaluated using Monte Carlo simulation considering the load amplitude, scouring depth, and the uncertainties in soil properties.
 Keywords
pile-soil-interaction (PSI);bottom-fixed offshore wind turbine;random sampling;natural frequency;scouring;
 Language
English
 Cited by
1.
Monopile head stiffness for servicibility limit state calculations in assessing the natural frequency of offshore wind turbines, International Journal of Geotechnical Engineering, 2017, 1  crossref(new windwow)
2.
3D FEM Analysis of a Pile-Supported Riverine Platform under Environmental Loads Incorporating Soil-Pile Interaction, Computation, 2018, 6, 1, 8  crossref(new windwow)
3.
A Comparative Study of Multiple-Criteria Decision-Making Methods under Stochastic Inputs, Energies, 2016, 9, 12, 566  crossref(new windwow)
4.
Reliability Analysis of Offshore Wind Turbines Considering Soil-Pile Interaction and Scouring Effect, Journal of Korean Society of Coastal and Ocean Engineers, 2016, 28, 4, 222  crossref(new windwow)
5.
Static impedance functions for monopiles supporting offshore wind turbines in nonhomogeneous soils-emphasis on soil/monopile interface characteristics, Earthquakes and Structures, 2016, 10, 5, 1143  crossref(new windwow)
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