铁路机车牵引电机临界转速和不平衡响应分析  

CRITICAL SPEED AND UNBALANCE RESPONSE OF TRACTION MOTOR FOR RAILWAY LOCOMOTIVE

作　　者：陈聚龙 王俊国[1] 陈跃威 赵永翔[1] 

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《机械强度》2017年第6期1264-1270,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51475386;51175439;U1334204)资助~~

摘　　要：轴的抗弯刚度是影响转子动力学特性的重要因素,转子圆盘厚度对抗弯刚度影响较大。应用有限元软件Ansys建立某铁路机车牵引电机转子系统的一维和三维模型。分析圆盘厚度对临界转速的影响,随着圆盘厚度减少和圆盘质量集中,第一阶临界转速线性减小,且当圆盘质量集中到非常薄的圆盘上时,三维模型计算的临界转速趋近于一维梁单元集中质量法计算的结果,在此基础上讨论一维模型的适用范围。并进行三维模型不平衡响应分析,讨论不同圆盘厚度、不平衡质量、阻尼比对不平衡响应的影响。The bending stiffness of axis is an important influencing factor in the rotor dynamics. Rotor disc thickness has a great effect on the bending stiffness. The finite element software ANSYS is used to establish one-dimensional and threedimensional models of the traction motor rotor system for railway locomotive. The impact of the disc thickness on the critical speed is also analyzed. With the reduction of the disc thickness and concentration of disk mass,the first critical speed decreases linearly. In addition,when the disk mass is concentrated onto a very thin disk,the critical speed calculated by three-dimensional model is close to the calculation result of one-dimensional beam element method. Based on this way,the application range of a one-dimensional model is then discussed. Finally,unbalanced response analysis of three-dimensional model is given to discuss influence of different disc thickness,unbalance mass and damping ratio on the unbalance response.

关 键 词：抗弯刚度 圆盘厚度 临界转速 不平衡响应 

分 类 号：TH133.3[机械工程—机械制造及自动化] U264.2[机械工程—车辆工程]