摘要
针对旋转风轮的工作特性,考虑风力机叶片空气动力学载荷、惯性载荷及重力载荷的耦合效应,建立了风力机叶片交变载荷的计算模型。基于叶片的载荷模型,以结构动力学理论为基础,在研究叶片位移向量与振动变形之间关系的基础上,提出风力机叶片动力学响应的数值模拟方法。选取某5MW风力机为研究对象,分析了该风轮的空气动力学性能,数值模拟了额定风轮转速和额定风速下风力机叶片的轴向和切向载荷分布,以及该载荷特性下叶片在挥舞方向和摆振方向的振动速度和振动加速度变化规律。
The load model considering the rotation of the rotor for wind turbine blades is carried out by coupling of aerodynamics, inertia force and gravity. Applying with structural dynamics theory, the relation between displacement and vibration of wind turbine blades is discussed. Based on the load model, one analysis method of vibration characteristics for wind turbine blades is presented. As an example,one 5MW wind turbine rotor is chosen that the axial and tangential load of the blades are simulated under the rated rotation speed and wind speed. Then the flapwise and edgewise vibration velocity and acceleration of blades are simulated and explained.
出处
《现代制造工程》
CSCD
北大核心
2016年第2期103-107,共5页
Modern Manufacturing Engineering
基金
国家自然科学基金资助项目(51205430)
重庆市自然科学基金资助项目(cstc2011jj A70002)
中国博士后科学基金特别资助项目(2013T60842)
关键词
风力机叶片
结构动力学
动力学响应
数值模拟
wind turbine blades
structural dynamics
dynamic response
numerical simulation
