摘要
板带连轧机组是由多个工作机座及其辅助设备组成的复杂工作系统,其中每个工作机座都是一个多变量、非线性动态系统,并通过板带与其相邻的工作机座相互作用。板带轧机系统可视为由机架、液压装置、辊系、运动板带等多个刚体和可变形体组成的柔性多体机械系统。轧制过程中,轧机辊系发生振动的同时还与其接触的轧件存在相对运动。因此在动力分析中,轧机辊系与机架间板带的弹性变形和刚性运动相互耦合作用。综合考虑辊系的垂直运动、轧辊的转动以及板带刚性运动和弹性变形,通过动力学分析,实现柔性多体机械系统中刚体和可变形体位移场的描述,进而确定由于系统构件刚性运动与弹性变形同时作用引起的强非线性惯性耦合与刚度耦合作用规律,建立板带连轧机柔性多体系统耦合振动机理模型,分析耦合作用下辊系的动态响应和轧机工作稳定性,为实现轧件厚度动态控制提供理论依据。
Tandem strip mill is a complex system composed of a plurality of working frames and auxiliary equipments,each frame is a multi-variable,nonlinear dynamic system,and interacts with the adjacent one by the moving steel strip. The strip mill system can be seen as a flexible multi-body mechanical system composed of multiple rigid and deformable bodies such as：frames,hydraulic equipment,roller system,moving strip et al. During the rolling process,relative movement occurs between the roll system and stock which contacting with each other at the same time. With the comprehensive consideration of roll system‘s vertical movement and work roll＇s rotation,also with the rigid movement and elastic deformation of moving strip,this paper realizes the displacement field＇s description of rigid body and deformable body in flexible multi-body mechanical system through dynamic analysis,and then determines the law of strong nonlinear inertial coupling and stiffness coupling effect caused by the system structural elements＇ rigid motion and elastic deformation occurred simultaneously. Finally,the flexible multi-body system of tandem strip mill‘s coupling vibration mechanism model was established which can be used to analyze the roller system＇s dynamic response and working stability.
出处
《机械强度》
CAS
CSCD
北大核心
2016年第3期429-434,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(11202128)资助~~
关键词
板带轧机
柔性多体系统
运动板带
耦合振动
Strip rolling mill
Flexible multi-body mechanical system
Moving strip
Coupling vibration
