杀爆战斗部破碎形态及破片飞散特性数值模拟研究  

Numerical simulation research on warhead fragmentation shapeand fragments scattering characteristics

作　　者：胡亚峰[1] 张海林 陈战旗 李文博[1] 宁小磊[1] HU Yafeng;ZHANG Hailin;CHEN Zhanqi;LI Wenbo;NING Xiaolei(Huayin Ordance Test Center of China,Huayin 714200,China)

机构地区：[1]中国华阴兵器试验中心,陕西华阴714200

出　　处：《兵器装备工程学报》2024年第5期72-78,共7页Journal of Ordnance Equipment Engineering

基　　金：国防科研计划项目(1700010127)。

摘　　要：针对战斗部威力与毁伤效能评估需求,采用FEM和SPH方法基于相同的结构尺寸和材料参数构建了某型杀爆战斗部的数值模型,研究了杀爆战斗部的弹体破碎形态及破片飞散速度沿轴线分布规律,同时对爆炸能量在各物质之间的传递及分配情况进行了计算。研究结果表明:SPH方法可以较好的模拟弹体裂纹扩展和破片生成,但在破片初速计算上,SPH方法忽略了爆轰产物加载过程,而FEM方法无法计算破片速度牵连作用,两者与试验结果相比分别偏低4.4%和7.5%,SPH方法可以更加准确反映爆炸能量在各物质之间的传递及分配规律,其中破片动能占爆炸总能量的36%,壳体拉伸、断裂的塑性变形能占爆炸总能量的5.7%。For warhead damage effectiveness evaluation needs,FEM(finite element method)and SPH(smoothed particle hydrodynamics)were used to build the numerical model of warhead based on the same structure dimensions and material parameters,and the warhead fragmentation shape and fragments scattering velocity distribution along the casing axis were studied.The transmission and distribution of explosive energy in each material were calculated.The results show that the SPH method can better simulate the crack propagation and fragments generation of the warhead.However,in the calculation of the initial velocity of fragments,the SPH method ignores detonation product loading process,while the FEM method cannot calculate the effect of fragmentation velocity involvement.Compared with the experimental results,the FEM method and the SPH method are 4.4%and 7.5%lower,respectively.SPH method can more accurately reflect the transmission and distribution rules of explosive energy in each material.The kinetic energy of fragments accounts for 36%of the total explosion energy,and the plastic deformation energy of shell stretching and breaking accounts for 5.7%of the total explosion energy.

关 键 词：杀爆战斗部 数值模拟 有限元 光滑粒子 

分 类 号：O384[理学—流体力学]