基于动力学分析软件AUTODYN，对柱形装药水下爆炸进行数值模拟。采用无限水域下的二维计算方法， RDX柱形装药，仿真得到在药包径向，轴向间相隔22.5°的5个方向上不同位置的冲击波压力峰值，据此先定性分析了作用方位和长径比对远场压力峰值分布的影响。为避免对柱形装药冲击波直接量化分析，假设其压力峰值分布对于等量球形装药存在映射关系，进而得到映射系数，再结合球形装药经验公式得到压力峰值近似分布。最后用TNT水下起爆数值模拟初步验证了假设和分布式。
Abstract
Based on dynamics analysis software AUTODYN, numerical simulation on underwater explosion of cylindrical charges is completed. Using 2D calculation method under unlimited water and RDX cylindrical charges, shock wave pressure peaks of different positions on 5 directions between axial and radial directions (interval 22.5°) are obtained, and the effects resulted from action direction and aspect ratio on far-field pressure peak distribution are qualitatively analyzed. Then, for avoiding direct quantitative analysis on shock wave of cylindrical charges, the hypothesis that mapping relationship exists between peak pressure distribution of cylindrical charge explosion and that of spherical one with same dose is made. Then, the mapping coefficient is obtained, and the far-field pressure peak distribution is developed combining empirical formulas. Finally, numerical simulation of the TNT charge is done, and the previous hypothesis and distribution formula are preliminarily verified.
关键词
水下爆炸 /
柱形装药 /
作用方位 /
长径比 /
压力分布
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Key words
underwater explosion /
cylindiral charge /
action direction /
aspect ratio /
pressure distribution
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参考文献
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