SUMMARY
Experiment impacting explosive sample with a drop weight is a standard approach in China. Pores in explosive have a significant effect on its sensitivity under impact of a drop weight. In the experiments impacting explosive samples with a drop weight, it is difficult to observe the dynamic responding and igniting process around a poreby using a measurement approach. This work developed an approach to predict the effect of pore in explosive onsensitivity under impact with drop weight. The effect of pore in composition-B explosive on the sensitivity under impact with a drop weight was investigated by using numeral simulation in this work. Through a series of numerica lcalculation, it was found that when the sizes of pore in composition-B explosive are less than 0.3 mm, its effect on sensitivity under impact of a drop weight can be ignored. This result agrees with the experimental data.Defence Science Journal, 2013, 63(1), pp.108-113, DOI:http://dx.doi.org/10.14429/dsj.63.2321