冷轧机主传动系统组合谐波动力学特性  

Combined harmonics dynamics characteristics for main drive system of cold rolling mill

作　　者：李丽[1] 范岩松 钟琛豪 Li Li;Fan Yansong;Zhong Chenhao(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《锻压技术》2023年第11期133-140,共8页Forging & Stamping Technology

基　　金：内蒙古自治区直属高校基本科研业务费项目(0406082305)。

摘　　要：针对冷轧机主传动系统运行时的失稳振动现象,建立了主传动系统扭振模型。综合考虑系统阻尼及刚度,应用多尺度法求解冷轧机主传动系统在组合谐波作用下的动力学特性方程。采用数值方法,通过幅频响应曲线、相平面图和系统振动分岔图等研究外扰激励幅值、系统阻尼和系统刚度对冷轧机主传动系统的影响。仿真结果表明:系统阻尼、系统刚度和外扰激励幅值的变化会对冷轧机主传动系统的幅值、共振区域以及脊骨线位置产生影响。系统状态也会随着系统参数的变化呈现出不同的周期性运动规律,产生失稳分岔和混沌现象。研究为冷轧机主传动系统的设计提供了参数域选择与理论指导。For the unstable vibration phenomenon of main drive system of cold rolling mill during operation,the torsional vibration model of the main drive system was established.Then,taking system damping and stiffness into consideration comprehensively,the dynamic characteristic equation of the main drive system for rolling mill under the action of combined harmonics was solved by the multi-scale method.Furthermore,through numerical methods,the influences of external disturbance excitation amplitude,system damping and system stiffness on the main drive system of cold rolling mill were studied by means of amplitude-frequency response curve,phase plane diagrams and system vibration bifurcation diagrams.The simulation results show that the amplitude,resonance area and spine line position of the main drive system for cold rolling mill are affected by the changes in system damping,system stiffness and external disturbance excitation amplitude,and the system state also shows different periodic motion rules with the changing of the system parameters,resulting in unstable bifurcation and chaos phenomena.Thus,the research provides parameter domain selection and theoretical guidance for the design of the main drive system for cold rolling mill.

关 键 词：冷轧机 组合谐波 系统阻尼 系统刚度 外扰激励幅值 

分 类 号：TH113.1[机械工程—机械设计及理论] TG335.1[金属学及工艺—金属压力加工]