基于有限元法的刚性转子动平衡及动力学特性研究

Study on Dynamics Balance and Characteristic of Rigid Rotor Based on Finite Element Method

采用有限元方法,结合影响系数法双面动平衡原理对刚性转子进行动力学仿真分析,采用临界转速分析界定了转子工作转速下的刚柔属性,并通过谐响应分析,对临界转速的分析结果进行定量验证;比较不同支承方式、信号处理方式等对动平衡响应的影响。研究表明:基于加速度信号处理的配平精度优于基于位移信号处理的配平精度,采用有限元分析方法可以实现刚性转子的虚拟动平衡。

The kinetic emulating analysis of the rigid rotor combined with influence coefficient was carried out by finite element method（FEM）.Whether the rotor was rigid or flexible under the work speed was determined by the critical speed analysis.The results of critical speed analysis were certified by the method of harmonic response analysis.The influence of dynamic balance under unbalanced forms and signal processing method were compared by the theory of influence coefficient.The results showed that the balancing result based on the way of acceleration signal was better than the way of displacement signal and virtual balance could be obtained by finite element method.