多源激励下CSP轧机主传动扭振问题研究

发布时间：2018-05-31 09:30

  本文选题：扭振 + CSP轧机　； 参考：《机械工程学报》2017年10期

【摘要】：为研究薄板坯连铸连轧CSP轧机在轧制高强薄带钢时出现强烈振动这一普遍难题,利用轧机在线监测系统获取振动信号,分析得出CSP轧机存在电气驱动、机械传动及辊系压下耦合振动且振动信号表现出非线性谐波特征。以F3轧机主传动扭振问题为研究对象,通过建立传动等效非线性2自由度系统模型,将电气驱动谐波和轧制力谐波作为外扰激励施加到模型求解,结果显示轧机主传动在多源激励下存在超谐、亚谐及组合共振等多态特征。以w_1-w_2≈w-n型组合共振为例求解获得振动响应幅值随阻尼一次、三次项减小和刚度三次项、初始加载及谐波激励增大而增大的结论。由此制定利用抑制电气驱动电流谐波和轧制力谐波来抑制轧机传动扭振方案,试验结果表明振动幅值降低75%,取得显著效果。本文研究内容对深入认识传动非线性动力学特性与轧机系统耦合振动机理以及振动抑制提供参考。
[Abstract]:In order to study the strong vibration of thin slab continuous casting and rolling CSP mill when rolling high strength thin strip, the vibration signal was obtained by on-line monitoring system of rolling mill, and the electric drive of CSP mill was analyzed. The coupling vibration of mechanical transmission and roll system under pressure and the vibration signal shows nonlinear harmonic characteristic. Taking the torsional vibration of the main drive of F3 mill as the research object, the electric drive harmonic and rolling force harmonic are applied to the model by establishing the drive equivalent nonlinear two-degree-of-freedom system model. The results show that the main drive of rolling mill has the characteristics of superharmonic subharmonic and combined resonance under multi-source excitation. Taking w_1-w_2 鈮，

本文编号：1959153