考虑应力刚化影响的风力机叶片振动模态分析  

The simulation analysis of the vibration modal on a wind turbine blade under the stress stiffening effect

作　　者：孙保苍[1] 李鹏飞[1] 

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《可再生能源》2012年第5期38-41,共4页Renewable Energy Resources

基　　金：国防基础科研基金资助项目(A2520060236)

摘　　要：利用ANSYS软件建立了500 W风力机叶片的有限元模型。基于振动分析的基本理论,分析了应力刚化对风力机叶片固有频率的影响,研究了旋转状态下叶片振型的变化规律。通过比较不同转速下的仿真结果发现,叶片旋转越快,应力刚化对固有频率的影响越大,特别是对低阶固有频率的影响最为明显,在叶片的动力学分析计算中应予以考虑。研究结果对风力机叶片的动力学设计及控制具有一定的参考价值。In this paper,the finite element model of a 500 W wind turbine blade was built by using the ANSYS structural dynamic analysis software.On basis of the basic theory of vibration analysis,the stress stiffening influence on the natural frequency of blades was analyzed and the change law of vibration model under the different rotation speed was studied.By comparing the simulation results under different rotation speed,it was found that the faster the blade run,the greater the stress stiffening affect natural frequency,especially the low order natural frequency.So the stress stiffening effect should be considered for the analysis and calculation of dynamics.The results of the paper have some reference value to the dynamic design and control of the wind turbine blades.

关 键 词：风力机叶片 模态分析 应力刚化 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]