基于疲劳累积损伤的风力机叶片铺层厚度优化  

Optimization design of ply thickness of wind turbine blade based on fatigue cumulative damage

作　　者：赵雄翔 孙鹏文[2] 李天泽 ZHAO Xiongxiang;SUN Pengwen;LI Tianze(Energy Technology Center of Inner Mongolia Autonomous Region,Hohhot 010010,China;School of Mechanical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古自治区能源技术中心,呼和浩特010010 [2]内蒙古工业大学机械工程学院,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2022年第4期346-350,共5页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自然科学基金项目(2020MS05022)。

摘　　要：探究了叶片服役时长内的疲劳累积损伤和可靠度计算方法,以影响叶片可靠性的关键因素之一铺层厚度为设计变量、重量最小为目标函数、失效概率为约束条件,构建了优化数学模型,优化求解得到了满足可靠性要求的最佳铺层厚度。结果表明,该方法可以得到较为准确的叶片疲劳累积损伤,优化后的叶片重量减少了10.69%,减重效果明显。High reliability and long lifespan are the characteristics of a wind turbine blade,and its service life largely depends on prevention from fatigue cumulative damage.This paper studies the calculation method of fatigue cumulative damage and reliability of blades in service.Taking the ply thickness,one of the key factors affecting blade reliability,as the design variable,the minimum weight as the objective function and the failure probability as the constraint condition,an optimization mathematical model is established,and the optimal ply thickness meeting the reliability requirements is obtained.The results show that this method can obtain a more accurate value of cumulative fatigue damage of blade,and the weight of the optimized blade is reduced by 10.69%.The weight reduction effect is obvious.

关 键 词：疲劳累积损伤 失效概率 优化设计 铺层厚度 风力机叶片 

分 类 号：TH16[机械工程—机械制造及自动化]