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为了提高熔铸炸药块铸装药质量,以质量比DNAN/RDX/Al:55/20/25的基础配方为研究载体,采用两种不同装药工艺进行装药对比试验,并对样品的内外部质量、装药密度及其均匀性进行分析.结果表明,与常规块铸工艺相比,采用预整形同步块铸技术所装填的药柱,其装药密度达到了1.726g/cm3,相对密度为95.8%,与常规块铸工艺相比分别提高了0.041 g,/cm3和2.2%;同时减少了装药的缺陷,使装药内外部质量获得提高,并改善了装药的密度及其均匀性. 相似文献
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为确保混合炸药在压滤装药工艺过程中的安全性,通过工艺过程安全性分析,获得了工艺安全性风险因素及其分类;利用试验测试和数值仿真手段,对一种DNAN基熔铸混合炸药(MCX-D)的本质安全性、相容性、机械和热刺激等装药工艺安全性影响因素进行了分析与研究。结果表明,炸药本质上是安全的,压滤工艺过程中组分变化和热损伤导致炸药本身感度的升高有限(机械感度≤40%),符合使用要求;装药在温度和压力双重作用下的内部温升仅为0.3℃左右,不存在热爆炸的可能性。由此证明DNAN基熔铸炸药压滤装药工艺是安全可靠的。 相似文献
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A large-scale experimental system for multiphase combustion and explosion study was developed and manufactured.The explosion tank consists of a 2 m diameter,3.5 m long tube and ellipsoidal domes on both ends.The volume of the experimental tank is 10 m3.Pressure histories of the explosion pressure can be measured at different locations in the tank.High pressure glass windows of 200~300 mm were used to have access to the visualization of the explosion process.The explosion process of methane/air mixture and methane/coal dust/air mixture initiated by a 40 J electric spark at the center of the tank was studied in the large-scale experimental system.Five pressure sensors were arranged in the tank with different distances from the ignition point.Ten dust dispersion units were equipped to eject dust into the tank.A high-speed camera system was used to visualize the flame propagation during the explosion process.The characteristics of the pressure wave and flame propagated in methane/air mixtures and methane/coal dust/air mixtures have been studied and analyzed. 相似文献