摘要
以陆地某5 MW大型风力机钢-混凝土组合塔架为研究对象,参考GL2010风力发电机塔架设计规范,对塔架的瞬态响应进行分析。考虑塔顶机舱风轮质量及钢-混组合结构的影响,建立了塔架有限元分析模型;采用Block Lanczos法对塔架进行了模态分析,得到了塔架前六阶固有频率和振型;通过模态叠加法求解,得到了恒定风速下塔架结构的稳态动响应与主要频率成分;分析了在瞬时强阵风作用下,塔架结构承载的变化规律与瞬态位移动响应时域历程;研究发现,在强阵风的作用下塔架横向振动会产生大幅波动,最大增加188.09%,在塔架结构设计时应给予一定的重视。
Based on the design specifications of wind tower GL2010,the transient response of a large land 5 MW wind-turbine tower was analyzed in the paper. A finite element analysis model of the tower was established on consideration of the mass of nacelle and rotor and the steel-concrete composite structure. Modal analysis was studied by using Block Lanczos method,then the top six natural frequencies and vibration modes were obtained. Solved by mode superposition method,the steady dynamic response and the main frequency components of tower were gotten under constant wind speed. The law of loading and the time domain history of transient displacement of the tower were investigated under strong gust. Results indicated that the tower was produced a huge transverse vibration up to 188.09%increased under strong gust which should be given great attention in design.
出处
《可再生能源》
CAS
北大核心
2015年第7期1042-1047,共6页
Renewable Energy Resources
基金
国家自然科学基金项目(51065026)
新疆科技重点专项项目(201130110)
新疆科技支疆项目(2013911032)
关键词
风机
钢-混凝土塔架
极端风况
模态分析
振动
wind turbine
steel-concrete composite tower
extreme wind condition
modal analysis
vibration
