Transactions of Materials and Heat Treatment

Title：Research on vibration characteristics of parametrically excited stiffness for cold rolling mill rolls

Authors： Peng Rongrong

Unit： Nanchang Institute of Technology

KeyWords： cold rolling mill rolling vibration flutter dynamic rolling force parametrically excited stiffness bifurcation

ClassificationCode：O322；TH113

year,vol(issue):pagenumber：2016,41(10):108-112

Abstract：

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.

Funds：

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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