自锻破片形成过程的二维数值模拟方法

NUMERICAL METHODS FOR SIMULATING SHAPE FORMATION IN SELF-FORGING-FRAGMENTS

本文研究用于自锻破片装药计算机辅助设计的二维Lagrange数值模拟方法。对于弹性-理想塑性-流体模型,讨论了其动力学方程的有限差分格式,着重介绍了在人为粘性、滑移面计算和重分网格等计算方法上的处理技巧。对于一种结构的自锻破片形成过程进行了数值模拟,并且同实验的X光照相作了比较,二者符合得较好。

In this paper two-dimensional numerical methods for simulating shape formation of self-forging-fragments are studied. The dynamical equations are based on an perfectly-elastic, ideally plastic-fluidmodel. The emphasis is put on the processing techniques of different calculating methods such as the artificial viscosity, the calculation of sliding surface, and regionalization (re-netting). A numerical example for the shape formation process of the self-forging-fragment is given and compared with experimental X-ray photos, showing good agreement, between them.