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Abstract：
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When the vibration of cold rolling mill rolls appears, the rolling forces in vertical and horizontal directions affect each other and are in dynamic changes, and the concept of dynamic rolling force was introduced. At the same time, considering the nonlinear damping, nonlinear stiffness and external excitation of rolling mill roll system, the nonlinear coupling vibration model of cold rolling mill roll system was established, and the amplitude frequency response of the coupling vibration system was solved by the multiple scale method. The results show that the nonlinear high-order stiffness and external excitation have obvious influence on the amplitude of coupling system of rolling mill, and there are two resonance regions accompanied by jumping phenomenon. Further, the static bifurcation equation of the system was obtained by singularity theory. And it is found that the dynamical behavior of nonlinear coupling system can be predicted and controlled by changing the unfolding parameters. Finally, the chaotic characteristics of the system were analyzed and verified by nonlinear theory, and the critical point of chaos behavior was given to reduce and avoid the resonance of nonlinear coupling system of rolling mill rolls.
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Funds：
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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）
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AuthorIntro：
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彭荣荣（1987-），男，硕士，讲师
E-mail：15294476178@163.com
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Reference：
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