基于TMD的海上浮动风力机结构振动控制研究

Structural Vibration Control of Offshore Floating Wind Turbine Based on TMD

将调谐质量阻尼器（TMD）引入海上浮动风力机结构动力学控制领域，建立了浮动风力机的气动．水动一控制．TMD－结构完全耦合动力学模型，对典型5MW驳船型浮动风力机进行了TMD参数优化和振动控制研究；通过对5种典型风浪联合载荷工况、有／无配置TMD的风力机的动态响应仿真，研究了TMD的振动抑制效果。结果表明：优化设计的TMD在100s内使风机塔顶纵向挠度的标准差降低45．7％；TMD使塔根纵向载荷、塔顶纵向挠度标准差降低20％－50％；使叶根纵向载荷、叶尖纵向挠度标准差降低10％－40％。因此，该TMD控制策略可显著减小海上浮动风力机各关键部位的振动响应及载荷。

In order to suppress the responses of the large vibration loads and deflections of the offshore floating wind turbine under the extreme wind and wave conditions, a passive tuned mass damper （TMD） is introduced to the dynamics control field of the floating wind turbine, and the fully coupled aero-hydro-control-TMD-structural dynamics model of the floating wind turbine is established in this paper. Parameter optimization of the TMD is researched based on the typical 5MW barge-type floating wind turbine. Five typical combined wind and wave load cases are se- lected under normal running state of the wind turbine ; the dynamic responses of the wind turbine with/without TMD are simulated and the suppression effect of the TMD is investigated. The results and their analysis show preliminarily that： ①The standard deviation of the tower top longitudinal deflection is decreased 45.7% in 100 seconds by the optimized TMD, so the optimized TMD can suppress the vibration in the form of the most important modal effectively. ②The suppression rates of the standard deviation of the longitudinal loads at tower base and deflections at tower top are 20%-50% and those of the longitudinal loads at blade root and deflections at blade tip are 10%-40% by the optimized TMD, which show that the optimized TMD can reduce the vibration loads and deflections of the key parts in wind turbine significantly under actual environmental conditions.