机电工程技术2025，Vol.54Issue(8)：17-22,93,7.DOI:10.3969/j.issn.1009-9492.2024.00124
风力机叶片疲劳裂纹扩展数值模拟与振动特性分析
Numerical Simulation of Crack Propagation and Vibration Modal Analysis of Wind Turbine Blade
摘要
Abstract
In view of the fatigue crack damage problem caused by wind turbine blades in the service environment with complex alternating loads,the law between fatigue crack extension and vibration mode of the blade is investigated by taking the FD3.2-2.0 wind turbine blade as an example.Firstly,a numerical model of crack extension is established by analyzing the mechanical behaviors and influencing factors in the process of crack extension.Then the crack extension simulation is carried out based on finite element,and the relationship between the crack extension position and the initial length of the crack is investigated.Finally,vibration modal analysis and random vibration analysis are carried out based on power spectral density analysis,and the laws between the crack initial length and crack extension position and the intrinsic frequency are investigated.Results show that:under the condition of the same crack extension position,different initial crack lengths do not have much influence on the extension rate,and the overall trend is slow and constant;the longer the initial crack is,the earlier the crack extension moment will be,and the intrinsic frequency decreases with the increase of the initial crack length.Under the condition of the same initial crack length,the influence of different crack extension positions on the extension rate is significant,the farther away from the leaf root,the earlier the crack extension moment is,and the intrinsic frequency decreases with the increase of the crack extension position.Relationship is investigated between crack extension location and crack initial length on the first six orders of intrinsic frequency and vibration response of cracked wind turbine blades,and the conclusions of the study can further determine the damage tolerance of the blades,which can help to optimize the design,monitoring and maintenance strategies of wind turbine blades,and to improve the reliability and economy of wind turbines.关键词
风力机叶片/裂纹扩展/数值模拟/振动特性Key words
wind turbine blade/crack extension/numerical simulation/vibration characteristics分类
动力与电气工程引用本文复制引用
周璇,安其尔,张谦祥,张毅超,葛新宇..风力机叶片疲劳裂纹扩展数值模拟与振动特性分析[J].机电工程技术,2025,54(8):17-22,93,7.基金项目
内蒙古自治区应用数学中心自主研究重点项目(ZZYJZD2022002) （ZZYJZD2022002）
内蒙古自治区直属高校基本科研业务(RZ2200002188) （RZ2200002188）
内蒙古工业大学自然基金(RZ2100000547) （RZ2100000547）
人才类项目/博士启动经费(DC2100000905) （DC2100000905）
