摘要
以水平轴风力机为对象,分析了风轮和塔架的动力学特性,并对风轮和塔架进行耦合,从而分析整机的结构动力学特性。叶片、塔架均为细长轴结构,将其简化为悬臂梁,利用二节点的梁单元进行划分建模。基于广义坐标系下的多自由度拉格朗日方程,建立其运动方程。利用模态分析方法求得固有频率和振型。并采用Newmark法计算确定载荷下的动态响应过程。以某1.5MW水平轴风力机为例,编制MATLAB仿真程序,得到该风力机的偏离位移。
The structural dynamic characters of rotor and tower of horizontal axis wind turbine were analyzed. Be- cause of the slender shaft structure, the rotor and tower were considered as a cantilever and two-node beam element was applied for diseretization modeling. The motion equation was set up based on Muhi-DOF Lagrange equations in the generalized coordinate system. The modal analysis was used to get natural frequencies and mode shapes, and Newmark method was used t~ determine the dynamic response under load. As an example, a 1.5MW wind turbine was calculated and the deviation displacement of this wind turbine was obtained by organizing the MATLAB simula- tion program.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2012年第10期1648-1654,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51076088)
广东省学科建设专项(cgzhzd0908)
关键词
水平轴风力机
模态分析
动态响应
耦合分析
horizontal axis wind turbines
modal analysis
dynamic response
coupling analysis
