水平轴风力机塔架的频率和振型特性实验研究  

Experimental study on frequency and vibration mode characteristics of horizontal axis wind turbine tower

作　　者：吴尧 高志鹰[1,2] 汪建文 陈永艳[1,2] 李欣 刘锟[1] 陈涛 Wu Yao;Gao Zhiying;Wang Jianwen;Chen Yongyan;Li Xin;Liu Kun;Chen Tao(Institute of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Wind Energy Solar Energy Utilization Mechanism and Optimization,Inner Mongolian Autonomous Region,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]内蒙古自治区风能太阳能利用机理及优化重点实验室,内蒙古呼和浩特010051

出　　处：《可再生能源》2021年第1期50-55,共6页Renewable Energy Resources

基　　金：国家自然科学基金项目(51866012);内蒙古自治区自然科学基金重大项目(2018ZD08)。

摘　　要：为了研究风力机塔架的振动特性,文章利用动态信号采集分析系统,对水平轴风力机塔架进行了实验模态分析和运行模态分析测试,得到了塔架静止与振动两种工况下的固有频率与模态振型,分析了塔架的振动特性。通过对风力机振动信号的频谱分析发现,风速小于10 m/s时,只能激励起塔架挥舞方向与摆振方向的二阶模态;通过对风力机塔架的模态分析发现,风力机发生振动,塔架固有频率与模态振型发生小幅度改变;随着风速和振动烈度的增大,塔架模态参数的变化幅度随之增大。该研究可以为风力机塔架优化设计提供借鉴。In order to study the vibration characteristics of wind turbine tower,the dynamic signal acquisition and analysis system is used to carry out the experimental modal analysis and operation modal analysis test of the horizontal axis wind turbine tower.The natural frequency and modal vibration mode of the tower under static and vibration conditions are obtained,and the vibration characteristics of the tower are analyzed.Through the frequency spectrum analysis of wind turbine vibration signal,it is found that the wind speed below 10 m/s can only excite the second-order mode of the tower;through the modal analysis of wind turbine tower,it is found that the vibration of wind turbine occurs,and the natural frequency and modal vibration mode of the tower change slightly;at the same time,with the increase of wind speed and vibration intensity,the change amplitude of tower modal parameters increases.This study can provide reference for the optimal design of wind turbine tower.

关 键 词：风力机 塔架 运行模态 模态分析 固有频率 模态振型 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]