风机法兰螺栓断裂对塔筒结构振动特性的影响分析  

Analysis of the Influence of Bolt Fracture on the Vibration Characteristics of Structure of Wind Turbine Tower

作　　者：胡良明[1] 张坤坤 欧阳儒贤 林政 李天晓[1] 赵子楠 HU Liang-ming;ZHANG Kun-kun;OUYANG Ru-xian;ILIN Zheng;LI Tian-xiao;ZHAO Zi-nan(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001

出　　处：《水电能源科学》2022年第8期208-211,共4页Water Resources and Power

摘　　要：为研究螺栓断裂对风机塔筒结构振动特性的影响,应用数值模态分析方法,通过ABAQUS软件,建立含有法兰螺栓的风机有限元计算模型,获取了各工况前6阶频率和振型,研究了不同螺栓断裂比例塔筒的频率及振型变化规律。结果表明,各层法兰螺栓断裂时,塔筒1阶频率变化最为敏感,2阶次之,3、4阶最不敏感,高阶基本无变化,因此可根据塔筒的低阶频率来判断螺栓是否断裂;法兰高阶振型对螺栓断裂十分敏感,可根据法兰3、4阶振型来监测螺栓是否发生断裂。该结果对丰富风电塔螺栓断裂快速检测理论方法及风电厂的安全运行具有现实工程意义。In order to study the effect of bolt fracture on the vibration characteristics of the wind turbine tower structure,numerical modal analysis methods were used to establish a finite element calculation model of the wind turbine with flange bolts through the ABAQUS software,and the first 6-order frequencies and vibration modes of each working condition were obtained.The frequency and vibration mode change laws of towers with different bolt fracture ratios were studied.The results show that when the bolt of every flange is broken,the first-order frequency of the tower is the most sensitive,the second is the second,the third and the fourth-order are the least sensitive,and the higher-order is basically unchanged;Therefore,it can estimated whether the bolt is broken according to the low-order frequency of the tower.The flange high-order vibration mode is very sensitive to bolt fracture.The third and fourth-order flange vibration modes can be used to monitor whether the bolt is broken.This result has practical engineering significance for enriching the theoretical methods of rapid detection of wind power tower bolt fractures and the safe operation of wind power plants.

关 键 词：风机 法兰螺栓 结构振动特性 模态分析 螺栓断裂 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]