摘要
以底部开门洞的大型风力机塔架为研究对象,研究了塔架在风轮、机舱荷载和塔架自身重力作用下引起的塔架屈曲问题的工程算法和有限元数值分析方法。对一个1.5MW风力机塔架在这类偏心荷载作用下的塔架屈曲值和屈曲模态进行了计算。计算结果表明:门洞的存在对薄壁筒体塔架的屈曲临界载荷有较大影响;相关标准提出的工程算法存在一定的局限性,需要结合有限元数值分析方法进行分析。在进行风力机塔架的设计时,该文计算结果具有一定的参考作用。
The engineering method and finite element numerical method of the buckling analysis of wind turbine tower with opening in its bottom under the gravity of rotor, nacelle and tower themselves were studied. As an application case, the buckling eigenvalues and buckling modes of a 1.5MW variable speed pitch regulated wind turbine tower under thus eccentric loading were calculated. The analysis results showed that the existence of opening deeply affects the buckling criti- cal loading of the thin-walled cylindrical shell tower. There are certain limitations of the engineering analysis method in some relevant standards of the tower buckling analysis, and this analysis should integrate engineering method with the FE numerical method sometimes.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第7期901-906,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50676022)
广州市科技计划项目(2007j1-c0431)
关键词
风力机塔架
屈曲
偏心载荷
门框
wind turbine tower
buckling
eccentric loading
opening
