摘要
介绍了风力机塔筒在多荷载联合作用下临界屈曲荷载的工程算法与有限元分析方法,并以某5 MW风力机塔筒为研究对象,对比分析不同方法得到的临界屈曲荷载。计算结果表明,线性屈曲分析由于未考虑非线性因素的影响,得到的临界屈曲荷载偏大,而非线性屈曲分析与工程算法得到的计算结果相近。根据计算结果得出,相关标准提出的工程算法存在一定的局限性,在实际验算中需采用有限元方法进行辅助分析,同时提出一种考虑初始缺陷的非线性屈曲分析方法。
The engineering algorithm and finite element analysis method of critical buckling load of the wind turbine tower under combined loads were introduced. A 5 MW wind turbine tower was taken as the research object, the critical buckling loads obtained by different methods were compared. The calculation results show that the critical buckling load achieved from the linear buckling analysis is larger because of ignoring the influence of nonlinear factors, while the nonlinear buckling analysis is similar to calculation results obtained from engineering algorithm. According to the calculated results, the proposed engineering algorithm according to the relevant standards has certain limitations, and the finite element method is needed to carry out auxiliary analysis in the actual calculation, meanwhile, a nonlinear buckling analysis method considering the initial defects is put forward.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第10期2659-2664,共6页
Acta Energiae Solaris Sinica
基金
江苏省自然科学基金青年基金(BK20130797)
江苏高校优势学科建设工程
关键词
风力机塔筒
稳定性验算
工程算法
非线性屈曲分析
临界屈曲荷载
wind turbine tower
stability computation
engineering algorithm
nonlinear bucking analysis
critical buckling load
