论文标题
一种新型的二维非线性调谐质量阻尼器INERTER及其在振动缓解风力涡轮机叶片中的应用
A novel two dimensional nonlinear tuned mass damper inerter and its application in vibration mitigation of wind turbine blade
论文作者
论文摘要
本文提出了一种新型的二维非线性调谐质量阻尼器INERTER（2D-NTMDI），以有效地减轻双向结构响应。 2D-NTMDI由一组质量和两组弹簧，仪表盘和INERTER组成，以两个轴配置。相对于两个轴的位移，所得的还原力是非线性的。虽然提出的新型2D-NTMDI具有同时减轻双向振动的能力，但系统的非线性使优化复杂化。采用了一种数值搜索方法来确定2D-NTMDI的最佳设计参数。为了评估有效性，所提出的2D-NTMDI部署在5MW的涡轮刀片中，该刀片具有边缘和侧面方向的双向振动。为此，建立了具有2D-NTMDI的风力涡轮机叶片的分析模型。风载是使用刀片元素动量理论计算的。在不同的加载条件下检查了2D-NTMDI的有效性。同样，风力涡轮机叶片的疲劳损伤是根据雨流周期计数方法和矿工定律计算的。结论是，优化的设计2D-NTMDI可以将刀片疲劳寿命延长$ 35 \％$。
The present paper proposes a novel two-dimensional non-linear tuned mass damper inerter (2d-NTMDI) to effectively mitigate bi-directional structural responses. The 2d-NTMDI consists of a mass and two sets of springs, dashpots and inerters configured in two axes. The resultant restoring forces are nonlinear with respect to the displacements in two axes. While the proposed novel 2d-NTMDI has the capability of mitigating bi-directional vibrations simultaneously, the system nonlinearity complicates the optimization. A numerical search method is adopted to determine the optimum design parameters of the 2d-NTMDI. To evaluate the effectiveness, the proposed 2d-NTMDI is deployed in a 5MW-wind turbine blade suffering from bi-directional vibrations in the edgewise and flapwise directions. To this end, an analytical model of a wind turbine blade with a 2d-NTMDI is established. The wind loading is computed using blade element momentum theory. The effectiveness of the 2d-NTMDI is examined under different loading conditions. Also, the fatigue damage of the wind turbine blades is calculated according to the rain-flow cycle counting approach and Miner's law. It is concluded that the optimized design 2d-NTMDI can prolong the blade fatigue life by $35\%$.
