Preliminary Design of a Submerged Support Structure for Floating Wind Turbines  

作　　者：LE Conghuan ZHANG Jian DING Hongyan ZHANG Puyang WANG Guilan 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China [2]School of Civil Engineering,Tianjin University,Tianjin 300350,China [3]Key Laboratory of Coast Civil Structure Safety(Tianjin University),Ministry of Education,Tianjin 300350,China [4]Fujian Provincial Investigation,Design and Research Institute of Water Conservancy and Hydropower,Fuzhou 350000,China

出　　处：《Journal of Ocean University of China》2020年第6期1265-1282,共18页中国海洋大学学报（英文版）

基　　金：The authors gratefully acknowledge the financial support from the Tianjin Municipal Natural Science Foundation(No.18JCYBJC22800).

摘　　要：Cost-effective floating wind turbines with efficient installations are highly desired in deep waters(>50 m).This paper presents a submerged floating offshore wind turbines(SFOWT)concept for intermediate water depths(50-200 m).The performance of SFOWTs can be improved through a judicious choice of configuration,pretension,and mooring line layout.Four SFOWTs with different configurations and a similar mass,named Cyl-4,Cub-4,Cyl-3,and Hex-3,were designed and analyzed.The responses of the four SFOWTs were predicted under operational condition and extreme condition.The results show that the four SFOWTs exhibited good performance under both conditions.The effect of platform configurations on power output was negligible under the operational condition.Under the extreme condition,among the four SFOWTs,the mean bending moments at the tower base were very close,while the maximum values differed by up to 21.5%,due to the configurations.The effect of wind-wave misalignment under the extreme condition was further analyzed.In general,the motion performances of the four-pontoon SFOWTs,Cyl-4 and Cub-4,were superior to those of the three-pontoon SFOWTs,Cyl-3 and Hex-3.Optimization studies of the mooring system were carried out on Cub-4 with different mooring line pretensions and four mooring layouts.The optimized Cub-4 could reduce the maximum motion responses in the surge,heave,and yaw by 97.7%,91.5%,and 98.7%,respectively.

关 键 词：floating offshore wind turbine structure design dynamic response aero-hydro-servo-elastic coupled analysis 

分 类 号：TM315[电气工程—电机] P75[天文地球—海洋科学]