水平轴风力机风轮和塔架的耦合分析  

COUPLING ANALYSIS OF ROTOR AND TOWER OF HORIZONTAL AXIS WIND TURBINE

作　　者：陈严[1] 罗振[1] 刘雄[1] 叶枝全[1] 

机构地区：[1]汕头大学能源科学研究所,汕头515063

出　　处：《太阳能学报》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)

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.

关 键 词：水平轴风力机 模态分析 动态响应 耦合分析 

分 类 号：TK8[动力工程及工程热物理—流体机械及工程]