Dynamic responses of K-type and inverted-K-type jacket support structures for offshore wind-turbines  

作　　者：LIAO Ying-di GUO Meng-yuan WANG Na HOU Li-jun CHEN Da 廖迎娣;郭梦圆;王娜;侯利军;陈达

机构地区：[1]Key Laboratory of Coastal Disaster and Defence, Ministry of Education (Hohai University), Nanjing 210098, China [2]College of Harbor, Coastal, and Offshore Engineering, Hohai University, Nanjing 210098, China

出　　处：《Journal of Central South University》2017年第4期947-956,共10页中南大学学报（英文版）

基　　金：Project(51509081)supported by the National Natural Science Foundation of China;Project(B12032)supported by the “111 Project” of China;Projects(BK20150037,BK20150811)supported by the Natural Science Foundation of Jiangsu Province,China

摘　　要：The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of manufacture and installation. A numerical study was presented on the dynamic responses of K-type and inverted-K-type jacket support structures subjected to different kinds of dynamic load. The results show that the inverted-K-type jacket structure has higher natural frequencies than the K-type. The wave force spectrum response shows that the maximum displacement of the K-type jacket structure is larger than that of the inverted-K-type. The time-history responses under wind and wave-current load indicate that the inverted-K-type jacket structure shows smaller displacement and stress compared with the K-type, and presents different stress concentration phenomena. The dynamic responses reveal that the inverted-K-type of jacket support structure has greater stiffness and superior mechanical properties, and thus is more applicable in the offshore area with relatively deep water.The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of manufacture and installation. A numerical study was presented on the dynamic responses of K-type and inverted-K-type jacket support structures subjected to different kinds of dynamic load. The results show that the inverted-K-type jacket structure has higher natural frequencies than the K-type. The wave force spectrum response shows that the maximum displacement of the K-type jacket structure is larger than that of the inverted-K-type. The time-history responses under wind and wave-current load indicate that the inverted-K-type jacket structure shows smaller displacement and stress compared with the K-type, and presents different stress concentration phenomena. The dynamic responses reveal that the inverted-K-type of jacket support structure has greater stiffness and superior mechanical properties, and thus is more applicable in the offshore area with relatively deep water.

关 键 词：JACKET SUPPORT structure K-type inverted-K-type FOUNDATION dynamic RESPONSES 

分 类 号：TM315[电气工程—电机]