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采用爆轰波理论分析了由爆炸成形弹丸装药而成的三点起爆爆轰波的相互作用。运用LS-DYNA软件数值模拟了三点起爆方式下的爆轰波作用、超压形成、药型罩在非均衡爆轰作用下的变形过程,以及尾翼的形成机理等。研究结果显示药型罩表面受到非均衡爆轰载荷作用,发生翻转、变形,在有超压作用的药型罩区域的压合程度小,形成弹丸尾翼,其中起爆半径对弹丸长径比、头尾速度、动能以及尾翼成形有重要影响。模拟中,起爆半径应选在20~30mm之间。实验结果对理论分析和数值模拟研究进行了验证。
The detonation wave theory is used to analyze the three-point detonation wave interaction caused by the charge of explosive forming projectile. Using LS-DYNA software, the detonation wave effect, overpressure and the deformation process of the drug-type hood under unbalanced detonation were simulated numerically with three-point detonation method and the formation mechanism of the tail wing. The results show that the surface of the drug-coated cover is subjected to unbalanced detonation loading, and it overturns and deforms. The degree of lamination in the area of the cover with overpressure is small, forming the tail of the projectile, in which the initiation radius is proportional to the aspect ratio of the projectile, Tail velocity, kinetic energy and tail forming have a significant impact. Simulation, the initiation radius should be selected between 20 ~ 30mm. The experimental results verify the theoretical analysis and numerical simulation.