大型电励磁直驱风力机动态特性分析  

Dynamics Character Analysis of Large-scale Electric Excitation Direct Driving Wind Turbine

作　　者：刘旺玉[1] 陈龙[1] 龚洋[1] 苏章明[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《科学技术与工程》2012年第6期1251-1254,共4页Science Technology and Engineering

摘　　要：以1.5 MW大型电励磁直驱风力发电机为研究对象,建立风力机三维实体模型。运用ANSYS WORKBENCH有限元软件对自由状态的直驱风力机进行动态特性分析,计算其固有频率及振型。进一步考虑风力机在受载情况下主轴承受力变形后产生的应力刚化效应,对风力机进行预应力下的动态特性分析,并计算其固有频率及振型。自由模态及预应力模态分析结果对比,表明主轴承的应力刚化效应会提高风力机的固有频率,高阶频率比低阶的改变更明显。Based on the three-dimensional model of the wind turbine system, free modal analysis were done by using the ANSYS software, and the frequencies and modal shapes were got. Furthermore, pre-stressed modal analy-sis considering stress stiffening ettect were also carried modal analysis, a conclusion is got that the stress stiffening effect can improve the natural frequencies of the wind turbine system, and the improvement is more obviously at higher level modals.

关 键 词：直驱风力机 动态特性 预应力 模态分析 ANSYS 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]