锻压技术

热连轧机辊系非线性水平振动特性

英文标题：Nonlinear horizontal vibration characteristics of hot rolling mill rolls

作者：彭荣荣

单位：南昌工学院

关键词：轧制热连轧机水平振动非线性幅频

分类号：TH113

出版年,卷(期):页码：2016,41(8):89-92

摘要：

考虑热连轧机振动时非线性阻尼、非线性刚度、轧机结构及轧制力的动态变化对轧机水平颤振的影响，建立轧机辊系非线性水平振动模型。应用多尺度法求解了系统的幅频特性方程，分析了不同轧制参数变化时对轧机水平振动幅频特性的影响，研究表明，可以通过减小阻尼、外扰力来降低轧机水平振动幅值，通过减小非线性刚度，增大非线性阻尼来缩小轧机水平振动区域。同时运用奇异性理论讨论了系统在非自治情况下的分岔特性，得到了系统的转迁集和分岔拓扑结构，给出了系统发生振动的临界条件。以上研究结果为抑制和控制轧机非线性水平振动系统提供了理论参考和借鉴。

Considering the influences of nonlinear damping, nonlinear stiffness, rolling mill structure and dynamical change of rolling force on horizontal vibration of the rolling mill when the hot rolling mill vibrated, a nonlinear horizontal vibration model of the rolling mill rolls was established. The amplitude frequency characteristics equation of the system was obtained by the multiple-scale method, and the influences of different rolling parameters on amplitude frequency characteristics of horizontal vibration were analyzed. At the same time, it was discussed the bifurcation characteristics under the nonautonomous according to the singularity theory, and the transition sets and bifurcation topology structure were obtained. Furthermore, the critical condition was obtained when the system vibrated, which provided a theoretical reference for suppressing and controlling the horizontal vibration of the rolling system.

基金项目：

江西省教育厅科学技术研究项目（GJJ151240）；南昌工学院科技计划项目（GJKJ-15-32）

彭荣荣（1987-），男，硕士，讲师

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