Study of offshore monopile behaviour due to ocean waves

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Title Study of offshore monopile behaviour due to ocean waves
Author Li, Miao; Zhang, Hong; Guan, Hong
Journal Name Ocean Engineering
Year Published 2011
Place of publication United Kingdom
Publisher Elsevier
Abstract Offshore monopile foundations are one of the most commonly used foundation structures in offshore renewable energy, especially in areas with relatively shallow water. They are characterised by relatively large geometric dimensions compared with other offshore pile foundations and differ from onshore piles in that they suffer from more dynamic ocean environments during their lifetime. One of the most significant aspects is associated with the wave effect on the structural behaviour of monopile foundations. In this study, a three-dimensional scaled boundary finite element model (SBFEM) is proposed to investigate structural responses of monopile foundations when exposed to ocean waves. Unlike other numerical techniques, SBFEM provides an analytical solution in the radial direction with numerical approximation along the discretised faces of the monopile foundation. The SBFEM model is validated by an equivalent finite element model, by which favourable computational efficiency and reliable accuracy are demonstrated. Subsequently, a parametric study is carried out focussing on various wave properties to gain an insight into monopile behaviour. Results show that the lateral displacement of the monopile foundation increases as wave numbers, wave amplitudes or water depths increase. This study aims at improving the design of offshore monopile foundations, when wave load is a dominant factor.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2011 Elsevier Inc. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 38
Issue Number 17-18
Page from 1946
Page to 1956
ISSN 0029-8018
Date Accessioned 2012-02-24
Language en_US
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Civil Engineering
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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