CAJ | 학술논문

以四辊板带轧机为例，分析液压压下缸及弯辊缸在轧机辊系振动时表现出的分段弹性力和摩擦力两种非线性约束，建立液压缸非线性约束作用下的轧机辊系振动模型，并采用平均法求得振动系统的幅频响应。通过比较两种非线性作用下辊系振动速度和振动幅值的仿真曲线，研究辊系受分段弹性力和摩擦力影响时的行为特性。取不同分段弹性力和摩擦力，仿真分析两种非线性因素分别对轧机辊系幅频特性的影响规律。结果表明，轧机辊系振动速度受分段弹性力大小影响，系统不稳定频率区域随分段弹性力增大而变宽；摩擦力较小时，对辊系振动行为影响表现为阻尼特性，较大时，摩擦力的非线性成为影响辊系振动行为的主要特性。该结论为轧机辊系振动控制提供了理论参考。
이사곤판대알궤위례，분석액압압하항급만곤항재알궤곤계진동시표현출적분단탄성력화마찰력량충비선성약속，건립액압항비선성약속작용하적알궤곤계진동모형，병채용평균법구득진동계통적폭빈향응。통과비교량충비선성작용하곤계진동속도화진동폭치적방진곡선，연구곤계수분단탄성력화마찰력영향시적행위특성。취불동분단탄성력화마찰력，방진분석량충비선성인소분별대알궤곤계폭빈특성적영향규률。결과표명，알궤곤계진동속도수분단탄성력대소영향，계통불은정빈솔구역수분단탄성력증대이변관；마찰력교소시，대곤계진동행위영향표현위조니특성，교대시，마찰력적비선성성위영향곤계진동행위적주요특성。해결론위알궤곤계진동공제제공료이론삼고。
With four-high plate mill as an example, two nonlinear constraints that are segmented elastic force and friction force of hydraulic screw-down cylinders and bending cylinders in rolling mill roll system vibration are analyzed, the model that nonlinear roll system vibration under the nonlinear constraint action from hydraulic cylinder is established, and amplitude-frequency response of the vibration system is obtained by using average method. The behavior characteristic of roll system under the action of segment elastic force and friction force is studied by analysis of vibration curves under the function produced by two kinds of nonlinear factors. The law of amplitude-frequency characteristics of roll system influenced by two kinds of nonlinear factors respectively is studied by taking different segmented elastic force and friction force. The results show that vibration speed is affected by the magnitude of elastic force, the instability frequency area is wider with increases of segmented elastic force increasing, and the influence on the vibration behavior of the roll system turns damping into nonlinear with friction force increasingly. This conclusion provides a theory reference for roll system vibration control.