基于Marc的风力发电机主轴动力学特性研究

摘要

In this paper,the vibration equation of a certain kind of wind turbine spindle was built according to the vibration theory.According to the problem of elastic support of bearing affecting the natural frequency of the spindle,two kinds of finite element model were set up,and the computational results were compared with using FEM software Marc for modal analysis.The contrast showed that every order natural frequency value is reduced with considering the elastic support of bearing,which means that the elastic support makes a great influence for the natural frequency value of spindle.Above all provide the basis for the further dynamics research.%本文根据振动理论建立了某型风力发电机主轴的振动方程。针对轴承弹性支撑对主轴固有频率影响的问题,建立了两种有限元模型,运用Marc有限元软件进行模态分析,并对计算结果做了对比。通过对比得出,考虑轴承弹性支撑方案计算出来的各阶固有频率值均有降低,说明轴承的弹性支撑对主轴固有频率有着较大的影响。这为以后进行进一步动力学研究提供了依据。