中文摘要：

首先简要介绍了对轧制过程进行数值模拟的基本理论，阐述了影响计算精度和效率的关键因素．通过分析材料密度对显式动力学方法稳定性极限的影响，引出“质量放大”这一概念．针对单板建立了三维的有限元模型，运用显式动力学方法实现了轧制过程的有限元模拟，并验证了结果的正确性．考察了不同质量放大因子对计算所得工件轧制后尺寸、轧辊与工件接触压力以及工件内能和动能的影响，确定了质量放大因子的合理区间．分析了质量放大因子对计算效率的影响．研究结果表明：在不影响计算精度的情况下，可以通过适当放大质量因子提高工件轧制模拟的计算效率，同时也给出了轧制后工件的几何形状变化规律．本工作为弥散核燃料板的轧制复合模拟研究奠定了基础．

英文摘要：

Firstly, the basic theory of numerical simulation for the rolling process was chiefly introduced, and the key factors that influence computation accuracy and efficiency were given. A concept of＂mass scaling＂ was put forward by analyzing the effect of material density on the stability limit of the dynamic explicit algorithm. A three-dimensional finite element model was established for a single strip, and the finite element simulation for the rolling process was realized by the dynamic explicit algorithm. The accuracy of the results was also verified. The effects of various mass scaling factors on the strip sizes after processing, the contact pressure between the strip and the roller as well as the internal energy and kinetic energy during processing were investigated, and a reasonable series of mass scaling factors were determined. The effect of mass scaling factors on computation efficiency was also studied. The research results indicate that the computation efficiency of rolling simulation can be raised by properly increasing the mass scaling factors without affecting the computation accuracy. Meanwhile, the deformation characters of the strip after processing were revealed. This research lays a foundation for the rolling process simulation of dispersion nuclear fuel plates.