On the hydrodynamic responses of a multi-column TLP floating offshore wind turbine model. (1st June 2022)

• Record Type: Journal Article
• Authors: Han, Zhaolong; Zhao, Yongsheng; Su, Jie; He, Yanping; Xu, Yuwang; Wu, Feng; Jiang, Zhiyu
• Is Part Of: Ocean engineering. Volume 253(2022)
• Publication Date: 2022-06-01
• Subjects: Floating offshore wind turbine -- Wave basin model test -- FAST -- Dynamic characteristics -- Irregular wave; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.111262
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: The offshore floating wind turbine system is a key piece of equipment for harvesting wind energy from the ocean field. However, the structural safety analysis and design of such equipment largely require a suitable platform to accurately obtain the dynamic characteristics. In the present study, an attempt was made to investigate the dynamic responses of the proposed 5-MW WindStar multi-column tension-leg-platform (TLP) system under different ocean environment conditions. Typical motion responses of the WindStar system, including the surge and pitch, and a series of measurements obtained from wave basin tests, such as nacelle acceleration and tendon tension, were compared with those of simulated results from the FAST code under four hydrodynamic load conditions. Additionally, the second-order wave load was incorporated with the first-order wave load, so as to allow for accurate evaluation of the high-frequency response of the floating offshore wind turbine (FOWT). Further, the effect of high-order wave loads on the high-frequency responses of the TLP FOWT was elucidated. The second-order frequency wave load was found to be a significant factor in determining the motion responses of the WindStar TLP system, and the results from FAST were found to agree well with those of the experiment. The coupled method of experiments and numerical analysis can be effectively used to understand the high-frequency dynamic responses of TLP FOWT systems, such as the WindStar TLP. Highlights: WindStar TLP is a 5 MW multi-column TLP offshore wind turbine system. The first and second hydrodynamic loads are considered. Dynamic response of WindStar is investigated by experiment and FAST code. The results of experiment and numerical analyses agree well with each other.