车削过程中工件模态时变特性的数值模拟  

Numerical Simulation of Time-dependent Model of Work-piece During Turning

作　　者：李顺才[1] 卓士创[2] 蒋红旗[1] 孟华[1] 

机构地区：[1]徐州师范大学机电工程学院,江苏徐州221116 [2]徐州师范大学物电学院,江苏徐州221116

出　　处：《噪声与振动控制》2012年第4期60-62,72,共4页Noise and Vibration Control

基　　金：江苏省"333"工程;江苏省"青蓝工程(10QLD006);徐州师范大学研究生科研创新计划项目(2011YLA008)

摘　　要：建立车削工件的力学模型及其弯曲振动的时变微分方程,指出车削过程中工件的自振频率及振型具有时变特性。利用ABAQUS软件对车削工件进行了有预应力的模态分析,得到了工件在不同车削长度时各阶模态的自振频率及振型。计算表明随着车削长度的增加,工件的一阶自振频率先增大后减少,一阶自振频率-车削长度曲线呈近似的抛物线分布。The mechanical model and the time-varying differential equation of bending vibration was established. It was pointed out that the natural frequency and vibration modes have a time-dependent feature. Using the ABAQUS software the pre-stress effect modal analysis of the turning work-piece on the lathe was analyzed and the natural frequencies and vibration modes at different turning length were obtained. The calculation indicates that with the increase in turning length, the first-order natural frequency increased, then it decreased and curve of the natural frequency-turning length displayed as a parabolic distribution.

关 键 词：振动与波 车削工件 模态分析 自振频率 ABAQUS 

分 类 号：TH161[机械工程—机械制造及自动化]