摘要
为提升风力机叶片结构稳定性,改善叶片局部屈曲现象,研究铺层参数对叶片结构稳定性的影响。建立1.5 MW风力机叶片的三维模型和铺层结构,并与实验值对比验证模型的质量和固有频率的准确度。借助CFD计算获得叶片表面的分布压力,以此为载荷对不同铺层角度叶片进行稳定性分析。计算结果表明:叶片在额定风速载荷下不会发生屈曲,满足设计要求;叶片后缘区结构设计较薄弱,局部屈曲主要出现在该区域;增加叶片尾缘铺层角度,保持主梁铺层角度不变,能提高叶片整体稳定性。
The influence of the parameters on the stability of the structure was studied in order to improve the stability ofwind turbine blade and avoid the local buckling of blade. The 3 D model and the layer structure of the 1.5 MW windturbine blade was established,the weight and nature frequency accuracy of the model were verified by comparing withthe experimental data. The distribution of load on the blade surface was calculated by CFD,and the stability of thedifferent layers of the blade was analyzed. The results showed that the blade is not buckling under the rated wind speedwhich satisfies the design requirements;the structure design of the trailing edge is weak,and the local buckling happensin this region;increasing the layer angle of the trailing edge and maintaining the angle of spar cap can improve theoverall stability of the blade.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第11期3168-3173,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51176129)
上海市教育委员会科研创新(重点)项目(13ZZ120)
教育部高等学校博士学科点专项科研基金(博导类)(20123120110008)
关键词
风力机
叶片
气动弹性剪裁
屈曲分析
wind turbine
blade
aeroelastic tailoring
buckling analysis
