Abstract
The offshore wind turbine single pile foundation structure is simple and easy to install, but in the earthquake environment, large horizontal displacement is easy to occur, which affects the safe operation of offshore wind turbines. For this reason, the bearing characteristics and influencing factors of large-diameter single-pile offshore wind power under earthquake load are analyzed. The Mohr-Coulomb model is used as the model. The ABAQUS is used to construct the large-scale single-pile finite element model of offshore wind power. Loads and analysis of bearing characteristics and influencing factors of large-diameter single-pile offshore wind power under seismic loading. It is found that the increase of pile foundation depth will significantly reduce the horizontal displacement at the top of single pile. After increasing to a certain extent, it has no significant effect on the development of horizontal deformation of large diameter single pile; with the increase of pile diameter and wall thickness, The deformation of large diameter single pile foundation is reduced, but the influence of the pile foundation thickness on the horizontal deformation of the large diame-ter single pile foundation is no longer significant.
Highlights
With the rapid development of China's economy and wind power technology, offshore wind power has become an important part of the world's renewable energy development
The large diameter single pile foundation is affected by earthquake, wind, wave and other loads during service
Numerical simulation methods include finite element, finite difference and discrete element method [11,12], in which finite element numerical simulation is widely used in pile foundation engineering
Summary
With the rapid development of China's economy and wind power technology, offshore wind power has become an important part of the world's renewable energy development. The single pile foundation is a common basic form of offshore wind power in China [1] A series of studies have been carried out on the bearing characteristics and seismic loading characteristics of large-diameter single-pile offshore wind power. The research content focuses on the bearing performance of single pile foundation, but the large-diameter single pile bearing of offshore wind power in complex environment (earthquake, wind, wave, etc.) Characteristic studies are still lacking. Based on the previous research results, the ABAQUS finite element method is used to study the bearing characteristics of large-diameter single-pile offshore wind power under seismic loading, and the factors such as depth, diameter and thickness of pile foundation are analyzed to support large-diameter singlepile offshore wind power. The influence of characteristics provides reference and guidance for the design and optimization of large-diameter single-pile offshore wind power
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