机械科学与技术2025，Vol.44Issue(8)：1301-1307,7.DOI:10.13433/j.cnki.1003-8728.20230288
永磁同步直驱风力发电机结构改进研究
Research on Structure Improvement of Permanent Magnet Synchronous Direct-drive Wind Turbine Generator
摘要
Abstract
In view of the unreasonable structural load distribution of direct-drive wind turbines and the frequent occurrence of tower breaking accidents,this paper improves the structure of direct-drive wind turbines based on the load distribution of direct-drive wind turbines.The mechanical analysis on the structures before and after the improvement is conducted,and the loaddistribution is calculated.The static analysis and prestress modal analysis of the structures before and after the improvement are carried out by using the finite element software.The comparative analysis results show that the maximum displacement after the improvement is reduced by 532.74 mm,the reduction is about 37.68%,and the relative tower height displacement is reduced by 0.33%.The maximum stress after improvement is 141.74 MPa,which is 81.43 MPa lower than that before improvement,with a decrease of about 36.48%and a decrease of 14.81%in the allowable stress.The vibration mode difference of tower drum structures before and after improvement is small,and the vibration mode rule is the same.After the improvement,the natural vibration frequency of the tower structure has increased,but the maximum change is only 0.000 08 Hz.关键词
直驱型风力发电机/结构改进/静力分析/预应力模态分析Key words
direct-drive wind turbine/structural improvement/static analysis/prestress modal analysis分类
能源科技引用本文复制引用
黄正军,刘泉,郝育新..永磁同步直驱风力发电机结构改进研究[J].机械科学与技术,2025,44(8):1301-1307,7.基金项目
国家自然科学基金面上项目(11872127) （11872127）
