复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (8): 70-74.DOI: 10.19936/j.cnki.2096-8000.20240828.010

• 应用研究 • 上一篇    下一篇

基于CLD的风电叶片挥舞疲劳试验寿命预测方法

冯学斌, 王博文, 张文伟, 邓航, 刘鹏辉   

  1. 株洲时代新材料科技股份有限公司 风电产品事业部,株洲 412000
  • 收稿日期:2023-07-20 出版日期:2024-08-28 发布日期:2024-09-25
  • 作者简介:冯学斌(1977—),男,博士,教授级高级工程师,研究方向为大型复合材料风电叶片设计和工程化应用。
  • 基金资助:
    国家重点研发计划(2022YFB3704504)

Life prediction method of wind turbine blade flapping fatigue test based on CLD model

FENG Xuebin, WANG Bowen, ZHANG Wenwei, DENG Hang, LIU Penghui   

  1. Wind Power Product Division, Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou 412000, China
  • Received:2023-07-20 Online:2024-08-28 Published:2024-09-25

摘要: 随着风电叶片长度的不断增加,挥舞疲劳测试时叶片自重和夹具重量对叶片产生的影响已无法忽略。本文以株洲时代新材料科技股份有限公司某90 m级叶片挥舞疲劳试验主梁失效为研究对象,测试了主梁拉挤板在不同应力比情况下的疲劳S-N曲线,基于Goodman等寿命图提出一种新的复合材料疲劳寿命预测方法。通过考虑平均应力对主梁疲劳寿命的影响,文章对比分析理论试验预测损伤及疲劳试验实际损伤,得出两个重要结论:①现有不考虑叶片自重的挥舞疲劳试验载荷等效方法已不能反映叶片的实际受载情况;②本文提出的考虑均值的Goodman疲劳寿命计算方法能够较准确地预测叶片的疲劳试验寿命。

关键词: 风电叶片, 挥舞疲劳, 平均应力, 疲劳试验, 累积损伤, 复合材料

Abstract: With the increasing length of wind turbine blades, the influence of blade weight and fixture weight on the blade during the flapping fatigue test can no longer be ignored. In this paper, taking the failure of the main beam of a 90 m-class blade waving fatigue experiment of Zhuzhou Times New Material Technology Co., Ltd., as the research object, the fatigue S-N curve of the main beam pultruded plate with different stress ratios was tested, and a new fatigue life prediction method for composite materials was proposed based on Goodman’s isotropic life diagram. By considering the effect of average stress on the fatigue life of the main beam, the article compares and analyzes the theoretical experimental prediction of damage and the actual fatigue experimental damage, and draws two important conclusions: ① The existing waving fatigue experimental load-equivalent method, which does not take into account the self-weight of the blade, can no longer reflect the actual loading of the blade; ② the Goodman fatigue life calculation method proposed in this paper can predict the fatigue experimental life of the blade more accurately by considering the mean value.

Key words: wind power blade, flapping fatigue, average stress, fatigue test, cumulative damage, composites

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