Title
Characteristics of ice-structure-soil interaction of an offshore wind turbine
Author
Zou, Pengxu (University of Michigan; CCCC Guangdong-Hong Kong-Macao Greater Bay Area Innovation Research Institute Ltd.)
Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk; University of Michigan) 
Fujisaki-Manome, Ayumi (University of Michigan)
Garcia, Fernando E. (University of Michigan)
Date
2024
Abstract
This research investigates the dynamic response of offshore wind turbine (OWT) systems subject to ice-structure-soil interaction (ISSI). To simulate the behavior of level ice sheets, a coupled approach involving the cohesive element method (CEM) and the finite element method (FEM) is applied. For soil-structure interaction (SSI), the Mohr–Coulomb (M-C) model is employed to accommodate glacial soils. A three-dimensional model for ice-OWT-soil interactions is established using LS-DYNA, focusing on the North American Great Lakes region. The impact of factors, including conical structure geometry, ice loading conditions, and soil characteristics, on the actions of ice and the displacement of the OWT structure, is systematically assessed. The results show a notable reduction in horizontal ice forces when a conical structure is used, underscoring its potential to enhance the stability of an OWT. Additionally, lower ice loading height results in increased ice force and reduced structural displacement. Furthermore, variations in soil properties, specifically elastic shear modulus, cohesion and angle of internal friction, exert a significant influence on OWT dynamics. The elastic shear modulus of glacial soils impacts the displacement of the OWT structure, posing a threat to structural stability. In addition, reduced cohesion and friction angle contribute to greater structural displacement.
Subject
Conical structures
Dynamic response
Glacial soils
Ice loads
Ice-structure-soil interaction
Offshore wind turbine
To reference this document use:
http://resolver.tudelft.nl/uuid:48e0620e-2ac4-47e5-8a83-3d0d356f2c71
DOI
https://doi.org/10.1016/j.oceaneng.2024.116975
Embargo date
2024-08-03
ISSN
0029-8018
Source
Ocean Engineering, 295
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Pengxu Zou, J.D. Bricker, Ayumi Fujisaki-Manome, Fernando E. Garcia