风机叶片主梁损伤分析及其维修方案可靠性检验  

Analysis of Spar Cap Damage of Wind Turbine Blades and Reliability Verification of Repair Scheme

作　　者：李秀海 毛建晖 骆传龙 史博文 LI Xiuhai;MAO Jianhui;LUO Chuanlong;SHI Bowen(Mingyang Smart Energy Group Co.,Lted.,Zhongshan 528437,Guangdong,China)

机构地区：[1]明阳智慧能源集团股份公司,广东中山528437

出　　处：《南方能源建设》2025年第2期71-78,共8页Southern Energy Construction

基　　金：内蒙古自治区“揭榜挂帅”项目“适应高海拔低温型陆上大型国产化风电机组研制”(2022JBGS0045)。

摘　　要：[目的]褶皱是风电叶片在制造过程中可能出现的一种缺陷,它可能导致叶片的强度下降,严重时会产生裂纹并导致叶片断裂。如何对褶皱缺陷进行维修以及验证维修后的叶片结构安全性问题是文章研究的重点。[方法]选取风电场某兆瓦级机组主梁褶皱损伤的叶片为研究对象。首先建立了叶片三维结构模型和有限元模型,通过有限元仿真分析了叶片屈曲稳定性和计算了主梁许用次数;然后,通过玻璃钢(FRP)的强度折损比预测了褶皱高度并制定了维修方案;最后,通过叶片全尺寸静力和疲劳测试验证维修方案的可靠性。[结果]结果表明:若无褶皱缺陷,主梁不会发生屈曲失稳和疲劳失效;维修后的叶片通过了静力和疲劳测试。[结论]依据玻璃钢强度折损比制定的维修方案具有一定可靠性,为风电叶片主梁褶皱的维修提供参考。[Objective]Wrinkle is a kind of defect that may occur in the manufacturing process of wind turbine blades.It may cause the strength of the blade to decrease,and in serious cases,cracks will be produced and lead to blade fracture,how to repair the wrinkle defects and verify the structural safety of the blade after repair is the focus of this paper.[Method]The blade of a megawatt-class unit of wind farm with spar cap wrinkling damage was selected as the research object.Firstly,the blade three-dimensional structural model and finite element model were established,and the blade buckling stability and the permissible number of spar cap were analyzed through finite element simulation;then,the wrinkle height was predicted through the strength loss ratio of glass fiber reinforced plastic(FRP),and a repair scheme was formulated;finally,the reliability of the repair scheme was verified through the full-size static and fatigue tests of the blade.[Reslut]The results show that the spar cap would not have buckling instability and fatigue failure if there is no wrinkling defect;the repaired blade passed the static and fatigue tests.[Conclusion]The repair scheme formulated based on the FRP strength loss ratio has a certain degree of reliability and provides a reference for the repair of wind turbine blade spar cap wrinkle.

关 键 词：褶皱 有限元仿真 强度折损比 维修 静力测试 疲劳测试 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TB33[一般工业技术—材料科学与工程]