变频电机转子临界转速有限元计算.pdf

文档介绍：应用与实验年第期第卷总第期·机械研究与应用·
2014 5 ( 27 , 133 )
变频电机转子临界转速有限元计算*
刘劲松,陈得意
(重庆交通大学,重庆)
400074
摘要:采用有限元法对某变频电机转子进行了模态分析,计算得到了转子的临界转速、固有频率和振型。通过临界

转速和振型图分析了转子的振动特性。计算结果表明,转子的设计具有良好的结构刚度,转子系统临界转速安全系
数合理。最后对比了有限元法和传递矩阵法的临界转速计算结果,证实了有限元法的准确性。
关键词:转子;有限元;临界转速;模态分析
中图分类号: 文献标志码: 文章编号: ( )
TM303 A 1007-4414 2014 05-0096-03
Finite Element Calculation of Critical Speed of a Rotor in Frequency Converted Motor
,
LIU Jin-song CHEN De-yi
(Chongqing Jiaotong University,Chongqing 400074, China)
Abstract: , ,
In this paper modal analysis of a rotor in frequency converted motor is made by using the finite element method
,
and the critical speed natural frequency and vibration of the rotor are abtained. Vibration characteristics of the rotor is ana-
lyzed through the critical speed and vibration diagram. The calculation results show that design of the rotor has good structural
,
stiffness and the safety factor of the critical speed of rotor system is reasonable. paring the critical speed results of the
,
finite element method and the transfer matrix method the accuracy of the finite element method has been confirmed.
Key words: ; ; ;
rotor finite element critical speed modal analysis
0 引言矩阵[K] 为刚度矩阵[B] 为旋转阻尼矩阵{F} 为
; ; ;
旋转机械被广泛应用于燃气轮机航空发动机外力和离心力{U} 为节点位移
、、; 。
工业压缩机及各种电动机等机械装置中在电力航以上矩阵一般都是转速为ω的函数陀螺矩阵
, 、。
空机械化工纺织等国民经济领域中起着非常重要取决于转速并且对转子动