摘要
为了研究铝氧比对含铝炸药在混凝土介质中爆炸性能的影响,采用数值模拟与实验相结合的方法,针对铝氧比分别为0、0.257、0.632的含铝炸药,利用AUTODYN有限元程序建立计算模型,计算了柱形装药在混凝土介质中的爆炸破坏过程,并且得到了在比例距离为2.5-10的范围内,3种含铝炸药爆炸形成的冲击波压力时程曲线。计算结果表明：冲击波峰值压力的衰减指数随炸药的铝氧比增大而减小,衰减指数分别为2.1、1.71、1.60;另外,当含铝炸药的铝氧比为0.257时比冲击波能最大。
Aluminum to oxygen Al/O ratio is very important to the performance of aluminized explo- sives. In order to study the influence of the ratio on the performance of explosives in concrete, three kinds of aluminized explosives are taken into account, and their Al/O ratio are 0, 0. 257 and 0. 632, respectively. In this paper, the damaging process of concrete medium under explosion of cylindrical charge is numerically simulated using AUTODYN program. Meanwhile, within the range of relative distance from 2.5 to 10, shock wave pressure-time curve are obtained by means of numerical simulation and experiment. The numerical study shows that shock wave attenuation exponents are 2.10, 1.71 and 1.60, the exponents decrease with the increasing of Al/O ratio. In addition, shock wave energy is maximum when the Al/O ratio equals 0. 257.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2015年第4期513-519,共7页
Explosion and Shock Waves
基金
国家自然科学基金项目(11172042)
关键词
爆炸力学
铝氧比
衰减指数
混凝土
冲击波能
mechanics of explosion
Al/O ratio
attenuation exponent
concrete
shock wave energy
