小型风力机塔筒减振环减振控制的研究

小型风力机在风轮起动至额定转速或者由额定转速降至起动状态的过渡区间有共振点,如果共振持续较长的时间,就会造成严重的事故。本文依据小型风力机塔筒的结构形式和共振特点,研制了小型风力机防共振的减振装置—减振环,对小型风力机塔筒进行减振控制。在无减振环和有减振环两种情况下,分别对一小型风力机塔筒进行了水平正弦荷载作用下的时程分析,以考察减振环对小型风力机塔筒的减振效果。结果表明,减振环的减振效果达到70%以上,减振效果明显。减振环的研制填补了小型风力机减振装置的空白,为小型风力机塔筒振动控制的理论研究和工程设计提供有价值的参考。

The Study of Vibration Control of Small Wind Turbine Towers by Using Response Reduction Ring

Small wind turbine towers may have resonance points while wind wheel rotates from the starting state to rated speed or from rated speed to the starting state. If the resonance vibration lasts for long time, it will cause serious accidents. According to structure form of small wind turbine towers and characteristics of resonance vibration, anti-resonance vibration device of small wind turbine towers, called as response reduction ring, has been developed by this paper , which controlled the response of small wind turbine towers. Time-history analysis for a small wind turbine tower under a horizontal sinusoidal had was conducted to assess the performance with and without a response reduction ring. The results show that the reduction effect of vibration reach more than 70% and the response reduction ring can favorably reduce the dynamic response. Development of response reduction ring will fill gaps in the vibration device of small wind turbines and provide a valuable reference for vibration control theory and engineering design.