风力机多层约束阻尼叶片抑颤性分析  

Suppressing Flutter Analysis on Multi-layer Constrained Damping Structure of Wind Turbine Blade

作　　者：张洪宁 孙大刚[1] 郭进军 张洋[1] ZHANG Hong-ning;SUN Da-gang;GUO Jin-jun;ZHANG Yang(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,太原030024

出　　处：《太原科技大学学报》2018年第6期461-466,共6页Journal of Taiyuan University of Science and Technology

摘　　要：为解决大型风力机叶片的颤振问题,将多层约束阻尼结构应用于风机叶片。基于复刚度法建立了局部多层约束阻尼叶片的动力学模型,并推导出结构损耗因子的计算式。采用混合单元法建立了某1. 5MW风力机普通叶片、单层约束阻尼叶片、多层约束阻尼叶片有限元模型,并进行了模态分析;通过Newmark直接积分法对三种叶片在额定风速下的动态响应进行了仿真对比。结果显示,多层约束阻尼叶片较单层约束阻尼叶片和普通叶片具有更好的抑颤性能,结构阻尼更高。研究结果可为大型风力机抑颤设计提供参考。In order to overcome the flutter problem of large-scale wind turbine blade,the multi-layer constrained damping structure was applied to the blade.The dynamic model of the multi-layer constrained damping blade was established based on the complex stiffness method,and the formula of the structural loss factor is deduced.Then,three-dimensional finite element model of a certain type of 1.5MW wind turbine blade,the constrained damping blade and the multi-layer constrained damping blade were established using mingle unit method.And the modal analysis was carried out.The dynamic response of three kinds of blades under the rated wind speed was simulated by Newmark direct integration method.The results showed that the multi-layer confinement damping blades had better anti-decay performance and higher structural damping than single-layer constrained damping blades and ordinary blades.The results can provide reference for the design of large-scale wind turbine.

关 键 词：风力机 叶片 阻尼抑颤 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]