摘要
文章采用有限元分析、应变片测试、超声轴力测试等方法对某风电叶片叶根螺栓组在不同工况下的载荷分布进行了试验研究。研究结果表明:有限元计算模型较为理想化,无法考虑安装时的对中误差、垂直度误差以及中心面偏移等带来的附加载荷对螺栓强度的影响;运用基于声弹性原理的螺栓轴向力超声在线监测技术,对叶片静力加载试验中的叶根螺栓组载荷进行实时监测,可以为叶片根端连接的强度计算和设计优化提供指导,也为风力发电机叶片螺栓载荷的在线监测奠定了基础。
By means of finite element analysis,strain gauge test and ultrasonic axial force test,the load distribution of a wind turbine blade root bolt group under different working conditions was studied.The results show that the finite element calculation model is more ideal and can not consider the influence of additional load on bolt strength caused by centering error,perpendicularity error and center plane offset during installation.The on-line ultrasonic monitoring technology of bolt axial force based on the principle of acoustoelasticity is used to monitor the bolt group load of blade root in the static load test of blade,which can provide guidance for strength calculation and design optimization of blade root end connection,and lay a foundation for online monitoring of bolt load of wind turbine blade.
作者
严勇
刘楚达
Yan Yong;Liu Chuda(Department of Aeronautical Machinery Manufacturing Engineering,Changsha Aeronautical Vocational and Technical College,Changsha 410124,China;Changsha Biaoneng Information Technology Co.,Ltd.,Changsha 410205,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2021年第8期1063-1068,共6页
Renewable Energy Resources
基金
湖南省自然科学基金科教联合项目(2019JJ70022)。
关键词
风电叶片
叶根螺栓
载荷
超声波
wind turbine blade
blade root bolt
load
ultrasonic
