某引信及其等效构件的慢速烤燃研究

为研究引信传爆序列的烤燃特性，建立简化的等效模型，以装填1,1-二氨基-2,2-二硝基乙 烯（FOX-7）导爆药和传爆药的某引信为研究对象，进行升温速率为3.3 ℃/h的烤燃试验。设计两种等效方案，对两种等效构件进行相同的烤燃试验。在试验基础上建立等效构件的烤燃模型，通过数值模拟研究了传爆序列的点火顺序。运用传热学理论分析点火机理，解释了传爆药先点火的原因。结果表明：外壁底部温度为177.1 ℃时发生点火；两种等效构件响应结果与全引信响应结果相同，均为爆燃反应，且破片状态基本一致，等效方案可行；点火点在传爆药中心，传爆药燃烧引起导爆药发生爆燃反应；当导爆药与传爆药为同一炸药时，引信烤燃过程中一般为传爆药先点火。

Study of Cook-off of a Fuze and Its Equivalent Components

A simplified equivalent model is established to study the cook-off characteristics of detonation train of fuze. The cook-off test with a heating rate of 3.3 ℃/h was carried out for a fuze filled with FOX-7 lead and booster explosoves. Two equivalent schemes were designed for the same cook-off test of the equivalent components. On the basis of the experiment, a cook-off model of the equivalent components is established, and the ignition sequence of the detonation train is studied through numerical simulation. The heat transfer theory is used to analyze the ignition mechanism, and explain the ignition cause of booster explosive. The results show that the ignition occurs when the temperature at the bottom of the outer wall is 177.1 ℃. The responses of two equivalent components are the same as that of the full fuze. They are all deflagration reactions, and the fragmentation status is basically the same. The equivalent scheme is feasible. The ignition point is in the center of booster explosive, and the combustion of booster explosive causes the deflagration reaction of lead explosive. The lead explosive is generally ignited firstly during cook-off when the lead and booster explosives are the same.