摘要
利用SPH算法给出战斗部对混凝土先侵彻后爆炸的数值分析 .在侵彻阶段弹体划分成Lagrangian标准有限元网格 ,而混凝土则划分成光滑粒子 .在启动炸药爆轰计算前将弹体材料的有限元网格也转换成光滑粒子 .给出了中止爆炸计算的准则 .通过侵彻与爆炸耦合的二维计算给出了弹坑的最终体积和战斗部壳体膨胀速度的历史曲线及爆轰产物的压力过程曲线 ,其中最大压力与C J爆轰压力一致 。
Using SPH algorithm the numerical analysis of the projectile penetrating and subsequently detonating in a concrete was documented. In the penetrative stage the projectile was divided into standard Lagrangian finite elements, but the concrete was divided into SPH nodes. The finite elemental meshes of the projectile were converted into smooth particles before the calculation of the detonations. The criterion for stopping off the explosive computations was presented. Through the 2-D computations the final volume of the crater at the concrete target, the curve of pressure vs time of the explosive products, and the curve of expanding velocity vs time of the projectile shell were obtained. It is noted that the computational maximum pressure of the explosive products is consistent with the C-J explosive pressure.
出处
《弹道学报》
EI
CSCD
北大核心
2004年第4期23-28,47,共7页
Journal of Ballistics
关键词
侵彻
爆轰
混凝土
SPH算法
penetration, detonation, concrete, SPH algorithm
