摘要
设置振动控制装置对风电机组塔架进行振动控制,能有效降低风塔的动力响应。目前在风电机组塔架中应用最为广泛的调谐质量阻尼器(TMD,tuned mass damper)存在着质量单元安装空间受到限制,且会增加塔体负担等问题。本文提出了用于塔架减振的固定质量阻尼器(FMD,fixed mass damper),它通过改变塔架与上部结构的连接方式,在机舱与塔架中间设置弹簧和阻尼单元,利用机舱、叶片等上部结构作为质量单元去减小塔架的振动。本文以某2MW风力发电机组塔架为例,建立FMD-塔架结构模型,并对其进行风载流固耦合动力响应分析。结果表明,塔架装设FMD耗能减振装置后,额定风况下塔架位移减小32%,同时加速度减小26.6%。由分析可知FMD-塔架结构较无控风机结构风载下动力响应减小明显且避免了传统TMD耗能减振装置安装不易、附加质量负担等问题,故FMD耗能减振装置可在风电机组中得到有效应用。
Setting up a vibration control device to control the vibration of the wind power tower can effectively reduce the dynamic response of the wind tower.At present,the most widely used tuned mass damper(TMD)in wind turbine towers has problems such as limited installation space of the mass units and increased burden on the tower.In this paper,a fixed mass damper(FMD)for tower vibration reduction was proposed.By changing the connection between the tower and the upper structure,a spring and damping unit was installed between the nacelle and the tower,and upper structures including nacelle and blade were used as mass elements to reduce tower vibration.Using a real 2MW wind turbine tower as the research object,a finite FMD-tower structure model was established and the fluid-solid coupling dynamic response analysis under wind load was performed.The results showed that the tower displacement and acceleration were reduced by 32%and 26.6%respectively under rated wind conditions when the tower was equipped with FMD energy-consuming vibration damping device.Comparing with the uncontrolled structure,the FMD-tower structure had significantly reduced the dynamic response under wind load.Besides,it avoids the problem of diffcult installation and additional mass burden with traditional TMD energy-consuming vibration damping devices.Therefore,FMD energy dissipation devices could be effectively applied in wind turbines.
作者
苏毅
任仕凯
施镐
Su Yi;Ren Shikai;Shi Hao(School of Civil Engineering,Nanjing Forestry University,210037,China)
出处
《特种结构》
2021年第5期47-51,共5页
Special Structures
关键词
风机塔架
固定质量阻尼器
双向流固耦合
风荷载
结构振动控制
Wind power tower
Fixed mass damper
Two-way fluid-solid coupling
Wind load
Structural vibration control
