圆球减振装置对风力发电高塔的振动控制研究  

Investigation on vibration control of wind turbines using a ball vibration absorber

作　　者：张自立[1] 陈建兵[1] 李杰[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《地震工程与工程振动》2012年第3期144-149,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家863计划项目"海上风力发电高塔可靠性设计与智能控制关键技术(2008AA05Z413)

摘　　要：本文提出了圆球减振装置对风力发电高塔振动控制的工作原理和计算方法,并对其控制效果进行了理论研究。首先利用拉格朗日方程推导得到圆球减振装置的自振频率及其对单自由度系统的被动控制力,并推广至多自由度系统。进而将风力发电高塔等效为集中质点模型,建立了风塔-减振装置体系的运动微分方程。用谐波叠加法模拟得到脉动风速时程,分析比较了风力发电高塔在无控及有控状态下的动力响应及疲劳寿命。计算结果表明,圆球减振装置是一种简单、经济和实用的减振装置,能够有效减小风塔的动力响应,延长其疲劳寿命。A new vibration control device for wind turbines called the ball vibration absorber is proposed in the present paper.The operating principle and calculation method for the vibration control of wind turbines using this device is introduced.The natural frequency of the absorber,as well as the control force on an SDOF system,is firstly derived through Lagrange＇s equation.The results are then extended to an MDOF system.By modeling the wind turbine as an MDOF structure,the equation of motion for the wind turbine-damping device system is obtained.The Davenport spectrum is used to simulate the wind loadings both on the tower and the blades of the wind turbine.Reductions in structural response with a ball vibration absorber are examined and a fatigue analysis is also carried out.The simulation results show that as a compact and economical device,the ball vibration absorber is able to effectively eliminate the dynamic response and extend the fatigue life of the wind turbine.

关 键 词：圆球减振装置 风力发电高塔 多自由度模型 振动控制 疲劳分析 

分 类 号：P315.92[天文地球—地震学] TU973.32[天文地球—固体地球物理学]