风电叶片摆振疲劳损伤分析与补强维修  

Edgewise Fatigue Analysis of Wind Turbine Blade and Structural Strengthening

作　　者：骆传龙 李秀海 李军向 顾育慧 张靖 杨海江 Luo Chuanlong;Li Xiuhai;Li Junxiang;Gu Yuhui;Zhang Jing;Yang Haijiang(Ming Yang Smart Energy Group Limited,Zhongshan 528437)

机构地区：[1]明阳智慧能源集团股份公司,中山528437

出　　处：《玻璃纤维》2022年第6期7-11,共5页Fiber Glass

摘　　要：为解决叶片的疲劳损伤问题,通过研究某70 m级叶片在摆振疲劳测试中的损伤问题,结合GL设计规范与疲劳累积损伤准则对叶片三轴玻纤布的疲劳进行了有限元分析。采用双轴玻纤布对叶片进行结构补强,并对补强后的叶片进行疲劳分析。结果表明,叶片壳体玻纤布铺层在90°方向纤维体积分数低是导致摆振疲劳损伤的主要原因,采用双轴玻纤布进行结构补强能有效提高叶片的摆振疲劳强度。最后,建议将0.54作为该叶片摆振疲劳90°方向安全系数的最小值。Because the wind blades bear complex loads in survice, especially edgewise fatigue loads, it is easy to cause fatigue damage. In order to solve this problem, the fatigue of triaxial glass fiber fabrics used in the blades was analyzed by finite element method, based on the edgewise fatigue test for a 70-meter-scale blade and combined with the GL design guideline and the fatigue cumulative damage criterion. Then, the damaged blade was strengthened with biaxial glass fiber fabrics and analyzed. The results showed that the low fiber content in the 90° direction of the glass fiber fabric lay-up was the main reason of the edgewise fatigue damage. The use of biaxial glass fiber fabrics for structural strengthening could effectively improve the fatigue strength of the blades. Finally, the safety factor of 0.54 was recommended to be the minimum safety factor for the blade fatigue analysis in the 90 degree direction.

关 键 词：风电叶片 疲劳损伤 补强 纤维体积分数 

分 类 号：TB332[一般工业技术—材料科学与工程]