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Shock and Vibration
Volume 2014, Article ID 543793, 11 pages
http://dx.doi.org/10.1155/2014/543793
Research Article

Analysis of Vertical-Horizontal Coupling Vibration Characteristics of Rolling Mill Rolls Based on Strip Dynamic Deformation Process

1School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066004, China
2Institute of Information Technology and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China

Received 26 October 2013; Revised 21 March 2014; Accepted 21 March 2014; Published 6 April 2014

Academic Editor: Valder Steffen

Copyright © 2014 Dongxiao Hou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nonlinear dynamic rolling forces in the vertical and horizontal directions are, respectively, established, considering the impact of vertical and horizontal directions vibration of rolls. Then a vertical-horizontal coupling nonlinear vibration dynamic model of rolling mill rolls is proposed, based on the interactions between this dynamic rolling force and mill structure. The amplitude-frequency equations of the main resonance and inner resonance are carried out by using multiple-scale method. The characteristics of amplitude frequency under nonlinear stiffness, damping, and amplitude of the disturbance are obtained by adopting the actual parameters of 1780 rolling mills. Finally, the bifurcation behavior of the system is studied, and it is found that many dynamic behaviors such as period, period-3 motion, and chaos exist in rolling mill, and this behavior could be restrained effectively by choosing proper system parameters.