某型高速电机转子动力学分析

Dynamic Analysis of High Speed Motor Rotor

为了避免电机转子的额定转速与转子系统的临界转速相接近而发生共振,应用有限元法,编写Ansys软件的APDL语言,对转子系统进行模态、Campbell图及不平衡响应计算。分别得到转子系统的前四阶模态振型和前两阶临界转速,利用不平衡响应法计算的临界转速与Campbell图法对比验证计算的正确性,并得到各结构位置处的稳态响应。研究结果表明,该转子额定转速避开了转子的临界转速,转子设计合理。

To prevent the rated speed and inherent critical speed of the motor in the process of its running from being close to resonant frequency,this paper uses the finite element method with writing APDL programs of ansys to carry out the modal analysis,Campbell graph and unbalanced response calculation.The first four order modes and the first two critical speeds of the rotor system can be obtained by the calculation.Then,the unbalanced response is used to calculate the critical speed and comparing with the results from Campbell graph,thus checking its correction.The results show that the rated speed of the motor rotor avoids the critical speed.It proves that the motor rotor design is reasonable.