摘要
针对风力机叶片,建立其结构动力学方程,推导分析了叶片旋转所产生的振动速度及其对来流的影响。基于BEM(Blade Element Momentum)理论,在风力机空气动力学基础上,建立了风力机的气动耦合分析模型。应用该模型,对某2MW风力机进行了计算分析,得到了叶片在额定工作风速下的振动变形、速度、加速度以及叶片沿展向的变形和载荷分布。充分考虑叶片的结构振动特性与来流风速的耦合效应,使得风力机空气动力学特性模型更加准确,对于风力机的设计和分析具有重要意义。
The structural dynamic equations of blades were constructed for blades of wind turbines. The vibration velocity of blades and the relative flow velocity were calculated using the structural dynamics model. Based on the BEM （Blade Element Momentum） theory and traditional areodynamics, the coupling model for wind turbines including the aeroelastic and aerodynamics was developed. Finally, the computation was completed for a 2MW wind turbine. The vibration deflec-tion, speed, aeceleration and load of the blades are computed at the rating wind speed. The areodynamic model of wind turbines becomes more accurate because of the coupling analysis between the vibration speed of blade and the wind speed. The results have very significance to the design of wind turbines.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第1期96-100,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50775227)
重庆市自然科学基金重点项目(CSTC,2008BC3029)
关键词
风力机叶片
结构动力学
气动弹性
耦合分析
blades of wind turbines
structural dynamics
aeroelastics
coupling analysis
