热连轧过程机架间运动板带动特性研究  

DYNAMIC CHARACTERISTICS OF MOVING STRIP BETWEEN HOT ROLLING MILLS

作　　者：崔金星 孙建亮 彭艳 邢建康 CUI Jin-xing;SUN Jian-liang;PENG Yan;XING Jian-kang(National Engineering Research Center for Equipment and Technology of Cold Rolled Strip,School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;Beijing Xinghang Electro-mechnical Co.,Ltd,Beijing 100074,China)

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004 [2]北京星航机电装备有限公司,北京100074

出　　处：《工程力学》2024年第5期234-246,共13页Engineering Mechanics

基　　金：国家自然科学基金区域创新发展联合基金重点支持项目(U20A20289);河北省中央引导地方科技发展资金项目(206Z1601G);河北省研究生创新资助项目(CXZZBS2020054)。

摘　　要：研究了热轧过程机架间运动板带动力学特征及其影响因素。基于热轧过程板带张力形成机理,考虑机架间板带张力建立了动态张力模型;同时,考虑热轧机活套辊对运动板带的支撑作用,基于Hamilton理论建立了运动板带等效运动梁模型,并基于四阶Galerkin截断法对偏微分方程进行离散化,得到系统四阶常微分方程组。仿真分析机架间板带张力、速度和活套辊支承刚度对运动板带动力学特性的影响,以及运动板带在辊系振动引发的速度摄动下振动特征和影响规律。结果表明:张力、板带速度和活套支撑辊刚度均影响板带动力学模态特征,且活套辊支撑作用可降低板带振动幅值;在热轧工艺范围内,调整板带张力和速度对运动板带的稳定性影响不大;辊系振动造成板带运动速度呈摄动特征,且摄动频率和幅值与板带振动强度关系密切。该研究对热轧过程机架间运动板带稳定性分析和活套控制设计提供参考。The dynamic characteristics and influencing factors of the moving strip between two hot rolling mills are studied.Considering the supporting effect of looper roll on the moving strip,an equivalent moving beam model is established based on Hamilton theory.At the same time,the partial differential equations are discretized based on the fourth-order Galerkin method,and the ordinary differential equations of the system are obtained.The effects of the strip tension,the rolling speed and the looper roll support stiffness on the dynamic characteristics of the moving strip are explored,and the midpoint position vibration state of the strip is simulated and analyzed.The vibration of roll system causes the perturbation of the strip speed,whose frequency and amplitude are closely related to the vibration intensity of the strip.This study provides a reference for the stability analysis of moving strip between stands and the design of looper control in hot rolling process.

关 键 词：热轧 运动板带 Galerkin离散法 张力 板带振动 混沌 

分 类 号：TH113.1[机械工程—机械设计及理论] TG333.7[金属学及工艺—金属压力加工]