Abstract
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.
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Foundation item: 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
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Liao, Yd., Guo, My., Wang, N. et al. Dynamic responses of K-type and inverted-K-type jacket support structures for offshore wind-turbines. J. Cent. South Univ. 24, 947–956 (2017). https://doi.org/10.1007/s11771-017-3497-6
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DOI: https://doi.org/10.1007/s11771-017-3497-6