摘要
通过建立1/N叶根连接结构有限元模型,对风电叶根T型螺母的力学性能进行了研究,提出一种叶根T型螺母应力的理论计算方法。根据T型螺母支反力的有限元计算结果,该计算方法采用近似的函数式来描述T型螺母的支反力,然后根据材料力学理论得到T型螺母弯矩和应力的理论计算式。通过对比T型螺母的弯矩,理论计算与有限元结果差异较小,说明叶根T型螺母应力理论计算方法是可行的。相比有限元方法,这种理论计算方法更加简单、方便,并且大大减少工作量,提高了工作效率。
This paper studies the mechanical properties of wind turbine blade root T-nuts by establishing a 1/N blade root connection structure finite element model,and proposes a theoretical calculation method for blade root T-nut stresses.According to the finite element calculation of the reaction force of the T-nut support,this calculation method uses an approximate function formula to describe the reaction force of the T-nut support,and then obtains the theoretical calculation formula of the bending moment and stress of the T-nut according to the material mechanics.By comparing the bending moments of T-nuts,the difference between the theoretical calculation and the finite element results is small,which indicates that the theoretical calculation method of the T-nuts in the blade root is feasible.Compared with the finite element method,this theoretical calculation method is simpler and more convenient,and greatly reduces the workload and improves the work efficiency.
作者
李有亮
赵春雨
倪敏
邵振威
柳胜举
LI Youliang;ZHAO Chunyu;NI Min;SHAO Zhenwei;LIU Shengju(Mingyang Smart Energy Group Limited,Zhongshan 528437,China)
出处
《机械工程师》
2020年第6期135-138,共4页
Mechanical Engineer
关键词
有限元
T型螺母
理论计算方法
弯矩
应力
finite element
T-nut
theoretical calculation method
bending moment
stress
