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Title: Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling

Abstract

The support structure of an offshore wind turbine (OWT) accounts for up to 25% of the capital cost; therefore, investigations into reliable and efficient foundations are critical for the offshore wind turbine industry. This paper describes an innovative hybrid monopile foundation for OWTs, which is an optimization of the original monopile foundation with broader applications. The behavior of OWTs with the hybrid monopile foundation in service conditions are investigated under lateral cyclic loadings, by considering the effects of wind, waves, and ice. A series of centrifuge tests are conducted in order to analyze these behaviors in detail, and OWT models with the original single-pile as well as wheel-only foundations are tested for comparison. Based on these tests, the accumulated lateral displacement and stiffness during cyclic loadings are presented, and the results indicate that the hybrid foundation exhibits a larger cyclic capacity than the other foundations. The influence of the cycle numbers, cyclic loading characteristics, and soil properties is examined during the tests; furthermore, the effects of these factors on the model deformation responses are illustrated. This study proposes the first analytical method for quantitatively estimating the cyclic lateral displacement of the new hybrid foundation in service conditions, and a degradationmore » coefficient is recommended based on the test results. This method aims to provide a simple approach to predicting responses of OWTs with hybrid monopile foundations in service conditions.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Civil Engineering
Publication Date:
Research Org.:
Lake Erie Energy Development Organization (LEED), Cleveland, OH (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1605662
Alternate Identifier(s):
OSTI ID: 1724113
Grant/Contract Number:  
EE0006714; DE‐EE0006714
Resource Type:
Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 209; Journal Issue: C; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 42 ENGINEERING; Centrifuge Modeling; Cyclic Capacity; Hybrid Monopile Foundation; Influence Factor; Offshore Wind Turbine; Service Condition

Citation Formats

Wang, Xuefei, Zeng, Xiangwu, Yang, Xu, and Li, Jiale. Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling. United States: N. p., 2017. Web. https://doi.org/10.1016/j.apenergy.2017.10.107.
Wang, Xuefei, Zeng, Xiangwu, Yang, Xu, & Li, Jiale. Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling. United States. https://doi.org/10.1016/j.apenergy.2017.10.107
Wang, Xuefei, Zeng, Xiangwu, Yang, Xu, and Li, Jiale. Sat . "Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling". United States. https://doi.org/10.1016/j.apenergy.2017.10.107. https://www.osti.gov/servlets/purl/1605662.
@article{osti_1605662,
title = {Feasibility study of offshore wind turbines with hybrid monopile foundation based on centrifuge modeling},
author = {Wang, Xuefei and Zeng, Xiangwu and Yang, Xu and Li, Jiale},
abstractNote = {The support structure of an offshore wind turbine (OWT) accounts for up to 25% of the capital cost; therefore, investigations into reliable and efficient foundations are critical for the offshore wind turbine industry. This paper describes an innovative hybrid monopile foundation for OWTs, which is an optimization of the original monopile foundation with broader applications. The behavior of OWTs with the hybrid monopile foundation in service conditions are investigated under lateral cyclic loadings, by considering the effects of wind, waves, and ice. A series of centrifuge tests are conducted in order to analyze these behaviors in detail, and OWT models with the original single-pile as well as wheel-only foundations are tested for comparison. Based on these tests, the accumulated lateral displacement and stiffness during cyclic loadings are presented, and the results indicate that the hybrid foundation exhibits a larger cyclic capacity than the other foundations. The influence of the cycle numbers, cyclic loading characteristics, and soil properties is examined during the tests; furthermore, the effects of these factors on the model deformation responses are illustrated. This study proposes the first analytical method for quantitatively estimating the cyclic lateral displacement of the new hybrid foundation in service conditions, and a degradation coefficient is recommended based on the test results. This method aims to provide a simple approach to predicting responses of OWTs with hybrid monopile foundations in service conditions.},
doi = {10.1016/j.apenergy.2017.10.107},
journal = {Applied Energy},
number = C,
volume = 209,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 31 works
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    Works referencing / citing this record:

    Foundations in Offshore Wind Farms: Evolution, Characteristics and Range of Use. Analysis of Main Dimensional Parameters in Monopile Foundations
    journal, December 2019

    • Sánchez, Sergio; López-Gutiérrez, José-Santos; Negro, Vicente
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    Comparative Study of Structural Reliability Assessment Methods for Offshore Wind Turbine Jacket Support Structures
    journal, January 2020

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