XING Zhan-qing, GAO Ji-zhang, ZHANG Jin-jie, FU Ping

China Institute of Water Resource and Hydropower Research, Beijing IWHR technology Co., Ltd., Beijing 100038, China

Abstract: Based on the semi-empirical relationship of clay accumulative deformation, taking cyclic cumulative deformation as creep, a finite element method for calculating accumulative deformation of offshore wind turbine bucket foundation in clay is developed. The long-term observation data of Xiangshui offshore wind and wave was Analyzed. Taking 2 MW demonstration wind turbine as an example, an analysis model is established. Under different cycle number, the deformation of bucket foundation including central settlement, uneven settlement and gradient of slope, is studied by this method. The result shows that the deformation of bucket foundation still meet the requirements of wind turbine operation after 50 years.

Key words: offshore wind turbine, bucket foundation, accumulative deformation, repeated load

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 12 No. 1, 2014)