中文摘要：

通过分析轧制过程中轧辊振动对轧件弹塑性变形状态的影响,研究不同轧辊振动方向下轧制力的变形特点及其表达形式,建立一种具有不对称滞后变形作用的动态轧制力模型。基于不对称动态轧制力模型,通过以某厂1780轧机实际参数进行数值仿真,得到轧辊半径、轧辊转速、前张力、后张力及入口厚度等因素变化下动态轧制力与轧辊振动位移之间的滞后关系曲线。从仿真结果中可以得出,随着轧辊半径的不断增大,滞后区域会逐渐增大,导致系统的耗散能量增大;减小轧辊的转速、板带的入口厚度都会使滞后区域减小,从而减少耗散的能量;同时还通过前、后张力对滞后曲线的影响规律验证热连轧机的微张力控制特点。以上结论为进一步研究和抑制轧机振动问题提供了理论基础。

英文摘要：

By the analysis of the effects caused by the roller vibration on the elastic-plastic deformation state of workpiece, the changing characteristics and the quantic of the rolling force under different directions of vibration are discussed, and a dynamical rolling force model with asymmetric hysteresis deformation impact is established. By taking the 1780 roiling mill for example, the simulation of the dynamical rolling force is performed, then the hysteresis variation characteristic between the rolling force and the vibration amplitude of roller under the change of the factors such as roller radius, roller speed, forward tension, backward tension, entry thickness and so on. It can be indicated from the simulation results that the incessant accretion of the roller radius will lead to the enlargement of the hysteresis region, which means that the increment of the energy dissipation of the system. However, minishing the roller speed and the entry thickness of the steel plate can narrow the hysteresis region, reducing the energy dissipation. Besides, the characteristic of micro-tension manipulation of hot tandem mill is verified by analysing the disciplinarian of the hysteresis curves under the variation of the forward tension and the backward tension. The results can be used to study and inhibit the rolling mill vibration.