摘要
为研究射弹材料对冲击起爆带壳炸药临界速度的影响规律,以期为射弹武器设计提供数据依据,采用LS-DYNA软件,应用冲击起爆Lee-Tarver点火增长模型,对相同质量的三种材料射弹撞击带壳炸药分别进行了数值仿真,分析了冲击起爆过程,得出了不同长径比下三种材料射弹对带壳炸药的临界起爆速度,并建立了理论计算模型,采用冲击起爆理论判据验证了数值仿真结果的准确性。计算结果表明:三种射弹材料对带壳炸药的引爆能力有明显差异;冲击起爆点并不位于炸药和壳体的交界面,冲击速度越大,起爆点越接近交界面;射弹长径比越大临界起爆速度越高。
To study the influence rules of the critical initiation speeds that the projectiles impact initiation shelled explosive with different materials and L/D ratios, so as to offer data reference for the armament design of projectiles, by using LS -DYNA software and the Lee -Tarver ignition and growth model, the numerical simulation of shelled PBX - 9404 explosive is researched when it is impacted respectively by three different materials of projectiles with the same mass, the initiation process is analyzed, the critical initiation speeds of the projectiles of three different materi- als with different L/D ratios are acquired, theoretical calculation model is established, and the results of numerical simulation are validated by detonation criteria. The results indicate that, among the three different projectiles, there are obvious differences in ability to initiate the shelled explosive. When the initiation point is not on the interface of shell and explosive, the faster of the impacting velocity is, the closer initiation point to the interface is. Besides, the bigger of the L/D ratio of projectile is, the higher of the critical initiation speed is.
出处
《计算机仿真》
CSCD
北大核心
2015年第2期11-14,296,共5页
Computer Simulation
关键词
射弹
带壳炸药
冲击起爆
临界起爆速度
爆炸力学
Projectile
Shelled explosive
Impact initiation
Critical initiation speed
Explosion mechanics
