Transactions of Materials and Heat Treatment

Title：Analysis on horizontal vibration behavior of hot rolling mill based on dynamic fiction and piecewise stiffness

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ClassificationCode：O322；TH113

year,vol(issue):pagenumber：2022,47(4):200-206

Abstract：

Considering the change state of friction force between rolling interfaces when the work roll vibrates and the condition of horizontal bearing block of work roll hitting against mill housing, the corresponding dynamic friction model and piecewise stiffness model were established, and the horizontal nonlinear vibration model of hot rolling mill was established. Then, the amplitude frequency characteristics of horizontal vibration system for hot rolling mill under linear damping term, cubic nonlinear term of dynamic friction force, piecewise stiffness term and external disturbance amplitude variation were studied. Finally, the bifurcation behavior of the vibration system for hot rolling mill under the change of external disturbance force was studied. It is found that the change of external excitation amplitude can make the vibration system enter into a chaotic state, and there are obvious phenomena such as period doubling bifurcation leading to paroxysmal chaos and chaotic motion, which is one of the reasons for the light and dark stripes on strip steel. Thus, the above research provides a theoretical basis for the suppression of roll system vibration and parameter optimization of hot rolling mill.

Funds：

河北省教育厅高等学校科学研究计划项目(QN2019803)

作者简介：王运涛（1991-），男，硕士，讲师 E-mail：wangyunt1991@163.com

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