DNAN基熔铸炸药成型过程数值仿真  

Simulation of Solidification Process for DNAN-based Melt-cast Explosives

作　　者：蒙君煚[1] 张向荣[1] 周霖[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《兵工学报》2013年第7期810-814,共5页Acta Armamentarii

摘　　要：为模拟DNAN基熔铸炸药成型过程,采用结构网格计算流场和温度场、非结构网格计算应力场的方法,得到DNAN基熔铸炸药冷却凝固时清晰的固液界面以及合理的缩孔缩松及热应力分布。通过对比研究,在一定模具和装药尺寸条件下,提出减少DNAN基熔铸炸药装药缩孔缩松、降低热应力极值以及缩短凝固时间的优化方案,方案为模具上表面保温1 h,模具下表面30℃恒温水浴。In order to simulate the pouring and solidification process of DNAN based melt-cast explo- sives, flow and thermal fields were calculated using structured mesh, and stress field was calculated using unstructured mesh. This numerical scheme can obtain an accurate interface between solid and liquid, reasonable shrinkage and stress data. By comparison research, on the condition of certain mould and charge size, the optimized scheme for DNAN-based melt-cast explosives is that thermal insulation on up- per mould surface for an hour with 30 ~C water on lower mould surface, in order to decrease shrinkage, thermal stress value and solidification time by overall consideration.

关 键 词：兵器科学与技术 流变学 熔铸炸药 结构与非结构网格 装药缺陷 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TG244[金属学及工艺—铸造]