兆瓦级风力发电机组塔架模态分析研究  

The Research of MW-level Wind Turbine Tower Modal Analysis

作　　者：谭季秋[1,2] 卿上乐 

机构地区：[1]湖南工程学院机械工程学院,湖南湘潭411101 [2]湖南省风电装备与电能变换协同创新中心,湖南湘潭411101

出　　处：《湘潭大学自然科学学报》2014年第3期35-40,共6页Natural Science Journal of Xiangtan University

基　　金：湖南省自然科学基金项目(11JJ9011)

摘　　要：为避免兆瓦级垂直轴风力发电机组的共振破坏,采用了流体控制方程建立兆瓦级垂直轴风力发电机组塔架流场模型,将计算得到的兆瓦级垂直轴风力发电机组塔架流场流速和压力再加载到塔架前后表面,对塔架进行流固耦合模态分析.结果表明,流固耦合场对兆瓦级垂直轴风力发电机组塔架模态振型的影响较小;流固耦合场对兆瓦级垂直轴风力发电机组塔架的固有频率和最大变形量的影响较大,且其影响程度随模态阶数的递增呈递减的规律;兆瓦级垂直轴风力发电机组塔架高度与风力机直径的比值越大,兆瓦级垂直轴风力发电机组塔架柔性越好,频率越低.In order to avoid resonance problem of MW-level vertical axis wind turbine induced by wind,a flow field model of the MW-level vertical axis wind turbine is established by using the fluid flow control equations.The flow＇s velocity and pressure of the MW-level vertical axis wind turbine and load onto tower＇ s before and after surface is calculated to study the Modal analysis of fluid-structure interaction of MW-level vertical axis wind turbine tower.The results show that fluid-structure interaction field of MW-level vertical axis wind turbine tower has little effect on the modal vibration;but has a great effect on its natural frequency and the maximum deformation,and the influence will decrease with increasing of modal order; MW-level vertical axis wind turbine tower,the larger the ratio of the tower height to wind turbines diameter,the better soft of the MW-level vertical axis wind turbine tower,the lower its frequency.

关 键 词：塔架 流固耦合 模态分析 兆瓦级风力发电机组 

分 类 号：TM315[电气工程—电机]