摘要
在现代柔性多体系统动力学理论的框架上,研究了风力机叶片的空间旋转运动与其弹性变形间的耦合 关系;对旋转叶片进行有限元离散,采用凯恩(Kane)方法,建立了一般形式的大型风力机叶片柔性多体动力 学方程;结合大型叶片几何构形特点,导出了旋转叶片的空间梁单元动力矩阵的显式形式;以1．5MW风力机叶 片为例,计算了该叶片的固有频率并与常规有限元数值分析结果进行了比较,体现了旋转叶片的动力刚化效应, 更准确地反映了叶片的动力学特性。
The coupling relationship between the space rotating movement of HAWT blade and its elastic distortion were studied by the modern flexible multi-body dynamics theory frame. Using Kane＇ s dynamics equations and taking finite element discretization about the rotating blade, the general flexible multi-body dynamics finite element equation of the large scale wind turbine rotating blade was developed. The apparent three dimensional beam element dynamical matrices were obtained according to the characteristic geometry shape of the blade. Finally, as an example, the natural frequencies of a 1 .SMW wind turbine blade were figured out and compared with those calculated by conventional finite element numerical analysis method. The dynamic Stiffening of rotating blade was displayed and the dynamic characteristics of the blade were more accurately achieved.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2005年第4期473-481,共9页
Acta Energiae Solaris Sinica
基金
国家高技术研究发展计划(863计划)专项经费国家自然科学基金(50076023)汕头大学博士后基金资助
关键词
旋转叶片
多体动力学
KANE方程
固有频率
动力刚化
rotating blade
multi-body dynamics
kane＇ s equation
natural frequency
dynamic stiffening
