双动力源作用下热连轧机工作辊非线性水平振动特性研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 133-137.

论文

双动力源作用下热连轧机工作辊非线性水平振动特性研究

凌启辉1，闫晓强1，张清东1，张义方1,2

作者信息 +

Research on hot rolling mill work rolls nonlinear level vibration characteristics under the action of dual power source

LING Qi-hui1，YAN Xiao-qiang 1，ZHANG Qing-dong1，ZHANG Yi-fang1, 2

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文章历史 +

摘要

建立双动力源作用的热连轧机工作辊非线性水平振动动力学模型，利用平均法求解系统主共振解析解近似表达式。以某厂热连轧机组为例，分析带钢刚度线性项、非线性二次项、阻尼线性项及双动力源总激励幅值对系统主共振幅频响应曲线影响。据水平振动微分方程求解主传动系统扭振、液压的系统垂振共同作用响应；以加速度有效值描述振动强弱，对比分析获得垂振对水平振动贡献量大于扭振贡献量；改变扭振、垂直两激励间相位角，两者相位约180°时水平振动最小，此可为抑制轧机水平振动提供理论依据。

Abstract

The nonlinear horizontal vibration dynamics model was built up about the hot strip mill top working roll, which based on the action of dual power source. The averaging method has been used to solve the system analytical solution approximate expression in the case of primary resonance. Taking a hot strip mill for example, the system primary resonance of amplitude-frequency response curve have been analyzed about the effects of the strip stiffness linear terms, stiffness nonlinear quadratic, damping linear terms and dual power source total excitation amplitude. Through the establishment of horizontal vibration differential equations, the system responses can be solved under the combined actions, which are the main drive system torsional vibration and hydraulic screwdown system vertical vibration. To describe the vibration intensity with acceleration RMS, it obtains that the vertical vibration contribution on the horizontal vibration is greater than the amount of torsional vibration contribution. When the phase angle changes between the torsional vibration excitation and vertical vibration excitation, the conclusion is that the horizontal vibration is minimal while the phase is about 180 °, which provides a theoretical basis for the inhibition of the mill horizontal vibration.

导出引用

凌启辉;闫晓强;张清东;张义方;. 双动力源作用下热连轧机工作辊非线性水平振动特性研究[J]. 振动与冲击, 2014, 33(12): 133-137

LING Qi-hui;YAN Xiao-qiang;ZHANG Qing-dong;ZHANG Yi-fang;. Research on hot rolling mill work rolls nonlinear level vibration characteristics under the action of dual power source[J]. Journal of Vibration and Shock, 2014, 33(12): 133-137