5MW风力机叶片模态特性分析  

Modal Analysis of 5 MW Wind Turbine Blades

作　　者：安利强[1] 周邢银[1] 赵鹤翔[1] 王璋奇[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,保定071003

出　　处：《动力工程学报》2013年第11期890-894,901,共6页Journal of Chinese Society of Power Engineering

基　　金：河北省高等学校科学技术研究指导资助项目(Z2011229);中央高校基本科研业务费专项资金资助项目(10MG17);河北省自然科学基金资助项目(E2013502291)

摘　　要：为了研究叶片铺层和主梁形式对大型自适应叶片动态特性的影响,利用Ansys软件建立了5MW风力机叶片的有限元模型.对不同梁帽铺层角度和主梁形式的叶片进行了模态分析,给出了各模型的前十阶固有频率和振型,分析了叶片梁帽铺层角度、主梁形式和转速对风力机叶片固有频率的影响.结果表明:叶片梁帽铺层角度和叶片主梁形式对固有频率具有重要影响;在叶片的弯扭耦合设计过程中,要考虑设计参数对叶片模态特性的影响,以避免叶片发生振动性能失效.To study the effect of ply orientation and spar structure on dynamic characteristics of large adaptive wind turbine blades,finite element models of 5 MW wind turbine blade were established using Ansys software,to which modal analysis was conducted for blades with different ply orientation and spar structures,and subsequently the first ten natural frequencies and corresponding vibration modes were obtained,while the effects of following factors on the natural frequency analyzed,such as the ply orientation,spar structure and rotating speed,etc.Results indicate that the ply orientation and spar structure of blades have a great effect on the natural frequency; in the twist-bend coupling of blades,the effects of design parameters on the modal shape of blades should be considered so as to avoid vibration failure of blades.

关 键 词：风力机 自适应叶片 模态特性 有限元法 振型 固有频率 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]