3D Modeling of Long-Term Dynamic Behavior of Monopile-Supported Offshore Wind Turbine in Clay
Publication: International Journal of Geomechanics
Volume 19, Issue 7
Abstract
This article outlines the long-term dynamic behavior of the monopile-supported offshore wind turbine (OWT) in clay. A three-dimensional (3D) finite-element (FE) model was developed that uses viscoelastic material constitutive models for soils in conjunction with stiffness-degradation functions to examine the long-term behavior of monopile-supported OWTs subjected to transient loading. The proposed numerical model was validated by experimental results and recorded data from real offshore wind turbines. Effects of amplitudes of wind and wave loads and their frequency, monopile length and diameter, and rotor-nacelle assemble (RNA) mass on the long-term dynamic behavior of a 5-MW OWT due to different load cycles were studied. The results show that the effect of wind load governs the design and that monopile diameter has a significant role in the long-term behavior of the structure.
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Acknowledgments
The authors are thankful to the anonymous reviewers for their critical comments, which have been very useful in improving the work.
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Published In
International Journal of Geomechanics
Volume 19 • Issue 7 • July 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: May 18, 2018
Accepted: Dec 31, 2018
Published online: Apr 16, 2019
Published in print: Jul 1, 2019
Discussion open until: Sep 16, 2019
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