Investigation of the VIMs of a spar-type FOWT using a model test method
Investigation of the VIMs of a spar-type FOWT using a model test method
复制标题
DOI：
10.1063/1.4966968
复制
发表时间：
2016-11
影响因子：
2.5
通讯作者：
F. Duan;Zhiqiang Hu;Jin Wang
中科院分区：
文献类型：
--
作者：
F. Duan;Zhiqiang Hu;Jin Wang
本文介绍了一个广泛的模型试验研究的OC 3 Spar型浮动海上风力涡轮机（FOWT）的涡激运动（VIM）的动态响应的研究结果。本研究的具体内容是调查风载荷对Spar型FOWT的独特且关键的影响，该系统与天然气和石油工业中使用的其他传统Spar型浮动系统有很大不同，对VIM有很大影响。模型试验进行了一系列的电流，风，和不规则波的海况，以分析VIM的耦合动力响应行为的性质。发现并分析了许多独特的特征。发现横流（CF）方向的摇摆锁定现象首先发生，然后是顺向（IL）方向的喘振锁定现象。对于仅有水流的情况，发现其余响应（包括其他4自由度运动、系泊张力和涡轮机轴承载荷）与摇摆/浪涌VIM耦合。此外，所有的响应的振荡幅度显着增加，随着流速的增加，特别是锁定后。此外，风荷载对CF和IL Vim响应有明显的抑制作用。实验结果表明，波浪荷载对部分CF响应和全部IL响应都产生了波激振荡，并在风抑制效应的基础上进一步抑制了Vim的振荡幅度。特别是，当涉及风荷载时，水流或波浪的影响仅限于偏航和IL塔顶弯矩。
This article presents the research findings of an extensive model test investigation of the dynamic response to vortex-induced motions (VIMs) of the OC3 spar-type floating offshore wind turbine (FOWT). Particulars of this research are to investigate the unique and crucial effects of wind load on the spar-type FOWT, which differs considerably from other traditional spar-type floating systems utilized in the gas and oil industry, on the VIMs. The model test was performed with a sequence of current, wind, and irregular wave sea states to analyze the nature of the coupled dynamic response behavior of VIMs. Many unique characteristics were found and analyzed. The lock-in phenomenon of sway in the cross flow (CF) direction was found to occur first, followed by the lock-in phenomenon of surge in the in-line (IL) direction. For the current-only case, the remaining responses, including the other 4-degree-of-freedom motions, mooring tensions, and turbine bearing loads, were found to be coupled by sway/surge VIMs. Moreover, the oscillation amplitudes of all of the responses increased significantly with increasing current velocity, particularly after locking-in. Furthermore, the wind load had a clear suppression effect on the CF and IL VIM responses. The experimental measurements demonstrated that the wave load excites wave-induced oscillations for some CF responses and all IL responses, and it further restrains the VIM oscillation amplitudes on the foundation of the wind suppression effect. In particular, when a wind load is involved, the influence of current or wave is limited to the yaw and IL tower-top bending moment.