一种新型风电塔架结构用双向TMD风致响应减振控制研究

Wind induced vibration mitigation of wind turbine structures with a new bi-directional TMD

为了减小风荷载作用下风电结构动力响应,提出一种双向调谐质量阻尼器(tuned mass damper,TMD)并对其减振效果展开研究。采用Davenport脉动风功率谱,模拟陆上风电场的脉动风速。建立顶部集中质量有限元模型和考虑风电结构叶片与塔筒耦合的叶片-塔筒有限元模型,计算两种模型的自振特性,并对安装双向TMD的风电结构的响应进行分析。分析结果表明:该装置具有较好减振效果;在两种不同计算模型下,风电结构塔筒顶部位移、加速度和底部弯矩计算结果及控制效果一致;在叶片-塔筒模型中,由于叶片-塔筒模型中叶素力与轮毂中存在偏心,使得叶片-塔筒模型顶部弯矩相比集中质量模型顶部弯矩较大。

To reduce the wind turbine structures dynamic response under wind load,a bi-direction tuned mass damper(TMD)was proposed and its mitigation effect was investigated.The fluctuating wind velocity of an onshore farm was simulated,using Davenport fluctuating wind power spectrum.A lumped mass finite element model and a blade-tower finite element model considering the coupling of blade and tower were established.The natural vibration characteristics of the two structure models were calculated.The responses of the wind turbine structure with bi-direction TMD were analyzed.The analysis results show that the TMD has better mitigation performance.The calculation results and control effects calculated by the two different models are the same.Due to eccentric distance between the blade element and the hub,the top bending moment of the blade-tower model is larger than that of the lumped mass model.