基于柔度系数影响线的风力机塔架法兰螺栓松动识别方法研究  

RESEARCH ON IDENTIFICATION TECHNOLOGY OF WIND TURBINE TOWER FLANGE BOLT LOOSENESS UPON INFLUENCE LINE OF FLEXIBILITY COEFFICIENT

作　　者：赵思钛 吕伟荣[1] 戚菁菁[1] 卢倍嵘[1] 胡益民 钟传旗 ZHAO Si-tai;LYU Wei-rong;QI Jing-jing;LU Bei-rong;HU Yi-min;ZHONG Chuan-qi(Department of Civil Engineering,Hu’nan University of Science and Technology,Xiangtan,Hu’nan 411201,China;Harbin Electric Corporation Wind Power Co.,Ltd.,Xiangtan,Hu’nan 411102,China;Shanghai Zhongjiao Water Transportation Design Research Co.,Ltd.,Shanghai 200082,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]哈电风能有限公司,湖南湘潭411102 [3]上海中交水运设计研究有限公司,上海200082

出　　处：《工程力学》2023年第12期185-193,共9页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51578235);湖南省自然科学基金项目面上项目(2021JJ30261);湖南省教育厅重点项目(20A184)。

摘　　要：基于平截面假定等基本假定,建立基于局部螺栓松动的法兰螺栓群受力模型;引入影响线概念,提出了基于柔度系数影响线的风力机塔架法兰主风向局部螺栓松动检测方法;通过绘制机头方位角-柔度系数曲线,实现了主风向局部螺栓松动位置识别和程度评估。建立风力机塔架连接法兰螺栓群有限元分析模型,验证了检测方法的有效性。通过在风力机塔架连接法兰拼接处呈正交方位布置应变计,并接入到风力机SCADA系统,与风向角、轮毂转速等上部机组参数同步采集,编制在线分析程序,提出基于影响线的风力机塔架法兰螺栓松动识别在线监控和评估方法,供实际工程选用。Based on the assumptions such as plane section assumption,the mechanical model of flange bolt group is established upon local bolt loosening.By introducing the concept of influence line,a method is proposed for detecting local bolt loosening in the main wind direction of wind turbine tower flange based on the influence line of flexibility coefficient.The location identification and degree evaluation of local bolt loosening in main wind direction can be realized by drawing the curve of nose azimuth-flexibility coefficient.The finite element analysis model of wind turbine tower flange bolt group is established to verify the validity of the detection method.The strain gauges are arranged in the orthogonal directions at the joint of the connecting flange of the tower cylinder of the wind turbine and connected to the SCADA system of the wind turbine,which is collected synchronously with the upper unit parameters such as wind direction,angle and hub speed.The on-line analysis program is developed,and the on-line monitoring and evaluation method of wind turbine tower flange bolt looseness identification based on influence line is put forward,which can be used in practical projects.

关 键 词：平截面假定 影响线 风力机 法兰 螺栓松动 柔度系数 

分 类 号：TH131.3[机械工程—机械制造及自动化]