In the process of cold tandem rolling, chatter instability leads to serious impacts on enhancing rolling speed, improving product quality, reducing production cost and realizing intellectualization. Chatter occurs with the rolling speed up to a certain threshold value, but the critical speed is determined by both product specifications and rolling schedules. A 5-stand cold tandem rolling mill whose first three stands and subsequent two stands, respectively, have four and six rolls was investigated by formulating its dynamic equations with the corresponding structure–process coupling. By applying the stability-based calculation model about the critical rolling speed in each stand, the system dynamic responses around the critical rolling speed were simulated, and the system eigenvalues which represent instability and characteristic frequencies were figured out. Thereafter, via combining the critical rolling speeds with the system dynamic behavior, a dynamics-based optimization model of rolling schedule for the 5-stand cold tandem system was proposed for the purposes of both the chatter suppression and rolling speed increase. In the optimization model, eight rolling technique parameters (four strip thicknesses and four tensions between the upstream and downstream stands) were taken as design variables, and the constraint conditions were set as no chatter instability in all five stands, and the optimization goal was to maximize the outlet speed of the final stand. The pattern search method was introduced to solve the optimization model. By applying such a dynamics-based optimization model for the 5-stand cold tandem rolling process, the chatter instability was suppressed effectively and the rolling efficiency was improved considerably; therefore, such an optimization model is expected to be valuable for intelligent manufacturing of rolling process.

在冷连轧过程中，颤振的不稳定性会对提高轧制速度，提高产品质量，降低生产成本和实现智能化产生严重影响。轧制速度达到一定阈值时会发生震颤，但临界速度由产品规格和轧制计划决定。通过建立具有相应结构-过程耦合的动力学方程，研究了五机架冷连轧机，其前三个机架和随后的两个机架分别具有四个和六个辊。通过应用基于稳定性的关于每个机架的临界轧制速度的计算模型，模拟了围绕临界轧制速度的系统动态响应，得出了代表不稳定性和特征频率的系统特征值。此后，通过将临界轧制速度与系统动态行为相结合，为抑制颤振和提高轧制速度，提出了基于动力学的五机架冷连轧系统轧制计划优化模型。在优化模型中，将八个轧制工艺参数（四个钢带厚度和四个上游机架和下游机架之间的张力）作为设计变量，并将约束条件设置为在所有五个机架中均不发生颤动不稳定性，并且优化目标是最大化最终机架的出口速度。引入了模式搜索方法来求解优化模型。通过将这种基于动力学的优化模型应用于五机架冷连轧过程，可以有效地抑制颤动不稳定性，并显着提高轧制效率。因此，预期这种优化模型对于轧制过程的智能制造将是有价值的。