Wind and Structures

  • 제21권6호
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  • Pages.625-639
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  • 2015
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Natural frequency of bottom-fixed offshore wind turbines considering pile-soil-interaction with material uncertainties and scouring depth

  • Yi, Jin-Hak (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Kim, Sun-Bin (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Yoon, Gil-Lim (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Andersen, Lars Vabbersgaard (Department of Civil Engineering, Aalborg University)
  • 투고 : 2015.11.15
  • 심사 : 2015.12.07
  • 발행 : 2015.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

연구 과제번호 : Reliability-based design of offshore wind turbines with focus on load estimation and dynamic soil-structure interaction

연구 과제 주관 기관 : Korea Institute of Energy Technology Evaluation and Planning (KETEP), Danish Agency for Science Technology and Innovation

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피인용 문헌

  1. Monopile head stiffness for servicibility limit state calculations in assessing the natural frequency of offshore wind turbines 2017, https://doi.org/10.1080/19386362.2016.1270794
  2. 3D FEM Analysis of a Pile-Supported Riverine Platform under Environmental Loads Incorporating Soil-Pile Interaction vol.6, pp.1, 2018, https://doi.org/10.3390/computation6010008
  3. A Comparative Study of Multiple-Criteria Decision-Making Methods under Stochastic Inputs vol.9, pp.12, 2016, https://doi.org/10.3390/en9070566
  4. Reliability Analysis of Offshore Wind Turbines Considering Soil-Pile Interaction and Scouring Effect vol.28, pp.4, 2016, https://doi.org/10.9765/KSCOE.2016.28.4.222
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