摘要
针对高柔塔架风致振动过大的问题,以某型2 MW风力机为参考对象,对其轻量优化,研究摆式调谐质量阻尼器(TMD)对轻量化塔架减振控制的效果.建立优化塔架的三维模型,通过有限元计算其固有频率,并根据其一阶共振频率确定TMD的摆长;提出风力机与TMD系统耦合的简化动力学模型,对其减振性能进行评估,分析出TMD的最优频率比和阻尼比,运用龙格-库塔(Runge-Kutta)算法验证了TMD在不同质量比下对塔架各项振动参数的影响.结果表明,在TMD与塔架一阶共振一致时,通过调节阻尼系数、质量比等参数,可使得优化塔架的振幅降低70%,有效地抑制塔架振动,提高了风机整体的鲁棒性.
To address the problem of excessive wind induced vibration in the high flex tower structure,a lightweight optimization is carried out for a certain type of 2MW wind turbine,and the effect of pendulum tuned mass damper(TMD)on the vibration control of the lightweight tower structure is studied.A three dimensional model of the optimized tower structure is established,and its natural frequency is calculated by finite element analysis.The pendulum length of the TMD is determined based on its first order resonance frequency.A simplified dynamic model of the wind turbine and TMD system is proposed to evaluate its vibration reduction performance,and the optimal frequency ratio and damping ratio of the TMD are analyzed.The Runge Kutta algorithm is used to verify the effect of TMD on various vibration parameters of the tower structure under different mass ratios.The results show that when the TMD is in resonance with the first order frequency of the tower structure,by adjusting parameters such as damping coefficient and mass ratio,the vibration amplitude of the optimized tower structure can be reduced by up to 70%,effectively suppressing tower vibration and improving the overall robustness of the wind turbine.
作者
周舟
梁题淼
魏克湘
耿晓峰
ZHOU Zhou;LIANG Timiao;WEI Kexiang;GENG Xiaofeng(College of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China)
出处
《湖南工程学院学报（自然科学版）》
2024年第1期19-24,共6页
Journal of Hunan Institute of Engineering(Natural Science Edition)
基金
国家自然科学基金资助项目(52175089)
湖南省自然科学省市联合基金项目(2021JJ50105)。
关键词
风力机塔架
轻量化
减振控制
动力学模型
wind tower
lightweight
vibration reduction control
dynamic model
