缺陷对风电叶片螺栓连接性能影响研究  

EFFECTS OF DEFECTS ON CONNECTION PERFORMANCE FOR WIND TURBINE BLADES

作　　者：喻光安 秦志文[1,2] 荣晓敏 王继辉[1] 杨科[2] 李书欣[1] Yu Guang’an;Qin Zhiwen;Rong Xiaomin;Wang Jihui;Yang Ke;Li Shuxin(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Key Laboratory of Wind Energy Utilization,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]中国科学院风能利用重点实验室,北京100190

出　　处：《太阳能学报》2019年第11期3244-3249,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目（51476171;51376180）;中国科学院风能利用重点实验室开放课题（KLWEU-2016-0301)

摘　　要：针对分段式风电叶片中的预埋螺栓套螺栓连接构型,考虑几何非线性和接触非线性,采用有限元方法分析螺栓连接部位的轴向应力分布,同时研究法兰结构、法兰缺陷以及螺栓套伸出长度对螺栓连接载荷系数以及螺栓疲劳寿命的影响。结果表明:法兰表面微小斜度或螺栓套伸出微小长度均会导致载荷系数迅速升高,进而大大降低螺栓的疲劳寿命;法兰缺口对螺栓连接载荷系数的影响分为2个阶段,当缺口面积不超过法兰两侧边界时,载荷系数由0.205缓慢增加到0.224,当超过两侧边界,载荷系数由0.224迅速增大到0.308。In this study,nonlinear finite element method was carried out to analyze the axial stress on a novel bolted joint configuration,which was feasibly applied and experimentally validated in a sectional wind turbine blade. The effects of flange flaws and extention of bushing on load factors and fatigue life of bolted joint were investigated. In conclusion,even slight inclination of the flange surface or small extension of bushing significantly increased load factors,which further reduced the fatigue life remarkably. When the notch area did not exceed the boundary of the flange,the load factors increased from 0.205 to 0.224 slowly,once the notch area jumped over the boundary,the load factors increased rapidly from 0.224 to 0.308.

关 键 词：载荷系数 螺栓连接 疲劳寿命 风电叶片 有限元法 

分 类 号：TB332[一般工业技术—材料科学与工程]