轧制界面非稳态润滑过程系统动力学模型的建立及其数值模拟

运用轧机辊缝动力学的基本理论结合非稳态润滑理论，建立了基于非稳态工作界面的动力学模型。该模型考虑了界面上金属塑性流动过程、界面上部分流体润滑与干摩擦并存的混合摩擦学过程以及工作辊的运动等多重耦合作用。塑性流动过程分析中考虑了界面摩擦状态的动态变化，界面摩擦特性分析中考虑了工作辊运动的动态耦合，因此工作界面上的轧制力模型、界面摩擦模型、工作辊运动模型构成了界面的薄膜约束多重耦合模型。对某大型公司2800轧机垂直系统的自激振动进行了仿真，定量地分析了一些主要参数对轧机垂直自激振动临界速度的影响。

System Dynamics Research and Numerical Simulation on Unsteady Lubrication Based on the Interface of Rolling

By using the basic theory of roll gap dynamics together with the theory of unsteady lubrication,a dynamic model based on the unsteady work interface was developed, in which the coupling interactions based on the metal plastic fluid process, the mixed friction process of the co-existent fractional fluid lubrication and dry friction, and the process of work roll movement etc. were taken into account. In the analysis of plastic fluid process, the dynamic changes of interface friction regime was considered, and the dynamic coupling of work roll movement was taken into account in the interface friction analysis, therefore the rolling force model, interface friction model and work roll movement model constituted the interface coupling model of thin film binding. A numerical simulation of vertical self-excited vibration for some high speed rolling mills was made, The corresponding simulation software has been developed and it is found that some parameters have a great impact on critical speed of vertical vibration.