In order to study the influence of pressing density on impact safety, some explosive charges with different densities were pressed utilizing A-IX-II explosive, composition B, and HMX-based aluminized explosive. The charges of A-IX-II explosive with density distribution in some order in the radial direction were pressed. The impact load test was carried out using a 400 kg weight drop. Results show that, with density increasing, the detonation threshold of A-IX-II explosive, composition B and HMX-based aluminiferous explosive increases. When the density of A-IX-II explosive is more than 1.680 g ? Cm -3, its detonation threshold has no obvious change, whereas the detonating thresholds of three kinds of explosive have a little difference. When the density of A-K-II explosive distributes irregularly, its detonation threshold is decreased a little, lower than that of symmetrical density,indicating that pressing density and its asymmetry of charge are two principal factors affecting impacting safety.%为了研究装药密度对撞击安全性的影响,针对A-Ⅸ-Ⅱ炸药、B炸药、HMX基含铝炸药压制了不同密度的药柱.用A-Ⅸ-Ⅱ炸药压制了径向呈一定密度分布的药柱,利川400 kg落锤进行了撞击加载试验.结果显示,随着密度的增大,A-Ⅸ-Ⅱ炸药、B炸药、HMX基含铝炸药的起爆阈值增加.对于A-Ⅸ-Ⅱ炸药,当装药密度达到1.680 g·cm-3以上时,起爆阈值没有明显差别.三种炸药的起爆阈值相差不大.当A-Ⅸ-Ⅱ炸药密度分布不均匀时,其起爆阈值有所下降,低于密度相对均匀的药柱.表明装药密度及密度均匀性是影响撞击安全性的两个主要因素.
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