兆瓦级风力机塔架的固有特性研究  

Inherent Characteristics Study of Megawatt Wind Turbine Tower

作　　者：王永胜[1] 赵萍[1] 颜志伟[1] 吕杏梅[1] 易权[1] 

机构地区：[1]南车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《大功率变流技术》2013年第3期70-73,86,共5页HIGH POWER CONVERTER TECHNOLOGY

摘　　要：建立了某型兆瓦级风力机塔架的力学模型,运用雷利法求出塔架第一阶弯曲振动和扭转振动固有频率的近似解,并研究了塔架直径、厚度、锥度角、上端结构质量、偏心距等参数对塔架基频的影响,利用有限元方法分析了塔架底部门孔尺寸、位置对塔架固有特性的影响,并与解析法的结果进行了对比,两者具有较好的一致性。Mechanical model of a MW wind turbine tower was established and the fundamental frequency of bending vibration and torsional vibration was obtained by Rayleigh method in this paper. The influence of the diameter, thickness, taper angle, up structure mass, offset of mass on the fundamental frequency of tower was studied. The influence of dimension and position of door frame on the fundamental frequency was studied by Finite Element Method. The results of Finite Element Method show good consistency with that of Rayleigh method by-comparison.

关 键 词：风力机塔架 固有特性 雷利法 有限元 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]