为研究热刺激强度对DNAN基熔铸炸药烤燃试验的热反应规律,利用自行设计的烤燃试验装置,采用多点测温烤燃试验,在升温速率0.055、1.0、2.0 K/min下对该炸药进行了烤燃试验.建立了炸药烤燃计算模型,分别模拟计算了升温速率0.055、0.5、1.0、2.0、3.0、5.0 K/min下的烤燃响应情况.结果表明,升温速率对DNAN基熔铸炸药的相变温度、响应温度、点火位置都有较大影响;升温速率为0.055 K/min时,炸药发生相变和响应时的温度较低,点火区域位于药柱中心;升温速率为5.0 K/min时,炸药发生相变和响应时的温度较高,而点火区域位于药柱上、下两端环状区域;随着升温速率的增大,炸药的响应温度不断升高,相变时的温度呈对数增加.%To study the thermal reaction law of thermal stimulation intensity on the cook-off test of DNAN based castable explosive,the cook-off tests of the explosive were carried out at three different heating rates of 0.055,1.0 and 2.0 K/min by using self-designed cook-off test apparatus and taking multipoint temperature measuring method.The calculation model of cook-off for the explosive was established and the response situations of cook-off at six heating rates of 0.055,0.5,1.0, 2.0,3.0 and 5.0 K/min were simulated and calculated,respectively.The results show that the heating rate has a greater influence on the phase change temperature,response temperature and ignition position of the DNAN based castable explo-sive.When the heating rate is 0.055 K/min,the temperature occurring the phase transition and response of explosive is lower,the ignition area is located in the center of the grain.When the heating rate is 5.0 K/min,the temperature occur-ring the phase transition and response of explosive is higher,and the ignition area is located in the annular area of the upper and lower ends of the grain.With the increase of the heating rate,the response temperature of the explosive increases con-stantly and the phase change temperature of the explosive increases logarithmically.
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