水平轴风力机筒型塔架动态响应分析  

DYNAMIC RESPONSE ANALYSIS OF THE TUBULAR TOWER OF HORIZONTAL AXIS WIND TURBINES

作　　者：刘雄[1] 李钢强[1] 陈严[1] 叶枝全[1] 田鹏[1] 

机构地区：[1]汕头大学能源研究所,汕头515063

出　　处：《太阳能学报》2010年第4期412-417,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50706023);广东省教育部产学研结合项目(2008B090500255);广东省自然科学基金(06027186);汕头大学科研启动基金

摘　　要：为获得水平轴风力机塔架在时变载荷作用下的动态响应,将塔架简化成悬臂梁,利用二结点梁单元进行离散化建模,分析了塔架弯曲振动固有动力特性。在建立塔架结构动力学运动方程、计算塔架所受时变载荷的基础上,运用线性加速度法和模态叠加原理对风力机塔架的动态响应进行计算,编制了相应的计算机程序。以某1.0MW风力机塔架为例,获得了风力机在湍流风运行条件下塔架在仿真时间内的位移、速度和加速度,并与"GHBladed"软件的计算结果进行了比较,表明计算模型是可行的。In order to obtain the dynamic response of the tubular tower of the horizontal axis wind turbine subjected to the time-varying load, the natural dynamic characteristics of the bending vibration of the tower was analyzed by considering the tower as a cantilever and applying two-node beam element for discretization modeling. Through establishing the structure dynamic equation and calculating the time-varying load on the tower, the dynamic response of the tower was calculated by applying linear acceleration method and modal superposition principle. A correspongding FEM program was developed to carry out the numerical analysis. The dynamic response of the tower of a 1.0MW wind turbine operating in turbulent wind was simulated by applying the developed program. The obtained displacement, software velocity and acceleration in the simulation time were compared with the results calculated by the ＂GH Bladed＂ software, and good agreements were achieved. This verifies the feasibility of the proposed model.

关 键 词：风力机 塔架 模态分析 动态响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]