锻压技术

轧制速度影响下冷连轧机辊系分岔行为分析

英文标题：Analysis on bifurcation behavior of cold rolling mill rolls influenced by rolling speed

作者：彭荣荣刘飞巩长芬

单位：南昌工学院西安科技大学

分类号：O322；TH113

出版年,卷(期):页码：2018,43(1):129-134

摘要：

在考虑轧机结构、轧机的实际动态轧制过程、轧制速度的变化以及轧制界面间摩擦系数的非线性特性等影响因素的基础之上，建立了一种受轧制速度影响的非线性动态轧制力模型。运用谐波平衡法求解振动系统的动力学方程，得到了受轧制速度影响的分岔响应方程，运用奇异性理论得到了系统的转迁集和拓扑结构曲线，研究了系统在不同参数下的静态分岔行为。同时，采用动态分岔图、相轨迹以及Poincare截面等非线性方法，分析了振动系统在周期运动、倍周期运动以及混沌运动之间相互转换的动态分岔特性，给出了系统发生振动的临界速度范围以及抑制措施。

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.

基金项目：

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

参考文献：

[1]Sun J L, Peng Y, Liu H M, et al. Vertical vibration of moving strip in rolling process based on beam theory[J]. Chinese Journal of Mechanical Engineering, 2009, 22(5): 680-687.

[2]孙建亮，谷尚武，刘宏民，等. 非对称轧制参数对厚板轧制力偏差的影响[J]. 塑性工程学报, 2016, 23(6):94-100.

Sun J L, Gu S W, Liu H M, et al. Influence of rolling parameters of cold rolling mill on vibration critical speed[J]. Journal of Plasticity Engineering, 2016, 23(6):94-100.

[3]陈晓军. 冷轧机轧制参数对振动临界速度的影响[J]. 锻压技术, 2017, 42(7):92-96.

Chen X J. Influence of rolling parameters of cold rolling mill on vibration critical speed[J]. Forging & Stamping Technology, 2017, 42(7):92-96.

[4]Tlusty J, Critchley S, Paton D. Chatter in cold rolling[J]. Annals of the CIRP, 1982, 31(1):195-199.

[5]郜志英,臧勇,曾令强.轧机颤振建模及理论研究[J].机械工程学报,2015,15(16):87-105.

Gao Z Y, Zang Y, Zeng L Q. Review of modelling and theortical studies on chatter in the rolling mills[J]. Chinese Journal of Mechanical Engineering,2015,15(16):87-105.

[6]Adam Bar, Andrzej S＇wiatoniowski. Interdependence between the rolling speed and non-linear vibrations of the mill system[J]. Journal of Materials Processing Technology, 2004, 155(30): 2116-2121.

[7]刘浩然,张莹,时培明,等.基于动态轧制力的四辊冷轧机七自由度振动特性研究[J].振动与冲击,2015,34(22):98-102.

Liu H R, Zhang Y, Shi P M, et al. Vibration characteristics of a cold rolling mill with a model of seven degrees of freedom and their influence on dynamic rolling force[J]. Chinese Journal of Vibration and Stock, 2015,34(22):98-102.

[8]王桥医，陈娟，高瑞进，等. 高速轧机工作界面非稳态润滑过程界面动力学特征[J]. 中南大学学报: 自然科学版,2013,44(2):546-551.

Wang Q Y, Chen J, Gao R J, et al. Interface dynamic characteristics of high-speed rolling mill work interface based on unsteady lubrication process [J].Journal of Central South University: Science and Technology,2013,44(2):546-551.

[9]侯东晓，彭荣荣，刘浩然. 变摩擦力下板带轧机辊系垂直-水平耦合振动特性[J]. 东北大学学报:自然科学版,2013,34(11):1615-1619.

Hou D X, Peng R R, Liu H R. Vertical-horizontal coupling vibration charactistics of strip mills rolls under the variable frication[J]. Journal of Northeastern University: Natural Science, 2013, 34(11):1615- 1619.

[10]彭荣荣. 冷连轧机辊系参激刚度颤振特性研究[J]. 锻压技术,2016,41(10):108-112.

Peng R R. Research on vibration characteristics of parametrically excited stiffness for cold rolling mill rolls[J]. Forging & Stamping Technology, 2016, 41 (10):108-112.

[11]彭荣荣. 轧机辊系垂直-水平耦合振动控制机理模型与特性研究[D]. 秦皇岛：燕山大学，2014.

Peng R R. Study on Vertical-horizontal Coupling Vibration Control Mechanism Model and Characteristic of Rolling Mill Rolls [D]. Qinhuangdao: Yanshan University, 2014.

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