锻压技术

冷连轧机辊系参激刚度颤振特性研究

英文标题：Research on vibration characteristics of parametrically excited stiffness for cold rolling mill rolls

作者：彭荣荣

单位：南昌工学院

分类号：O322；TH113

出版年,卷(期):页码：2016,41(10):108-112

摘要：

考虑轧辊表面振纹对辊系间的刚度变化的影响以及动态轧制力对振动系统的影响，依据轧机垂直振动的产生机理，建立了冷连轧机单自由度非线性颤振动力学模型。应用多尺度法求解得到了系统发生1/2亚谐共振时的幅频特性响应方程，仿真分析得到了不同参数变化对振动系统幅值以及振动区域的影响，并运用奇异性理论讨论了系统在非自治情况下的分岔特性，得到在3种不同情形下系统的转迁集与分岔拓扑结构图，给出了系统失稳的参数区域，从而可以避免轧机剧烈振动的发生，这为抑制和减少冷连轧机系统的振动提供了技术支撑与理论参考。

Considering the influence of chatter marks of roll surface on the stiffness changes among the mill rolls and the influence of dynamic rolling force on the vibration system, the nonlinear dynamic model of cold rolling mill with single degree of freedom was established according to the mechanism of vertical vibration. Then, the equations of amplitude-frequency were obtained by multiple-scale method when the system happened 1/2 subharmonic resonance, and the influences of different parameters changes on the vibration amplitude and region of vibration system were obtained by simulation analysis. Furthermore, the bifurcation characteristics under the nonautonomous were discussed by the singularity theory, and the transition sets and bifurcation topology structure of system were obtained under three different situations. Finally, the parametric region of system instability was given so as to avoid the occurrence of violent vibration, which provided a theoretical reference to suppress vibration of rolling mil rolls.

基金项目：

江西省教育厅科学技术研究项目 (GJJ151240)；南昌工学院科技计划项目(GJKJ-15-32)

作者简介：彭荣荣（1987-），男，硕士，讲师 E-mail：15294476178@163.com

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