Transactions of Materials and Heat Treatment

Title：Analysis on bifurcation behavior of cold rolling mill rolls influenced by rolling speed

Authors： Peng Rongrong Liu Fei Gong Changfen

Unit： Nanchang Institute of Technology Xi′an University of Science and Technology

KeyWords： rolling mill rolling speed dynamic rolling force nonlinear vibration bifurcation

ClassificationCode：O322；TH113

year,vol(issue):pagenumber：2018,43(1):129-134

Abstract：

A model of nonlinear dynamic rolling force effected by rolling speed was established by considering factors of rolling mill structure, actual dynamic rolling process of rolling mill, rolling speed changes and nonlinear characteristics of friction coefficient between rolling interfaces. Then, the dynamic equation of vibration system was solved by harmonic balance method, and the bifurcation response equations influenced by rolling speed were obtained. Furthermore, the transition sets and topological structure curve of the system were obtained by singularity theory, and the static bifurcation behavior of the system was researched under different parameters. At the same time, the dynamic bifurcation characteristics of the vibration system in the interconversion of periodic motion, period-doubling motion and chaotic motion were analyzed by the nonlinear methods of dynamic bifurcation diagram, phase trajectory and Poincare section, and the critical speed range and suppression measures of system vibration were given.

Funds：

江西省教育厅科学技术研究项目资助(GJJ151240)；2017年度南昌工学院校级课题（NGKJ-17-02）

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

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