不敏感弹药引信慢速烤燃热防护效能研究

在满足弹药作战效能需求的同时，避免受意外热刺激造成弹药的连环爆炸已经成为各国高度重视的技术难题.通常金属材质引信壳体的导热系数大，遭受到环境热刺激后热量传导速度快，严重危及了后续的导爆药和传爆药安全.为了研究引信防护壳体材质对热量的阻隔能力，进一步提升引信热防护效果，本文以典型舰载76 mm口径弹配引信为例，研制了基于石英灯阵列的可控烤燃系统，用于模拟热环境刺激；设计并实现了嵌入于引信的多路测温微系统，试验证实其具有高可靠嵌入测试、多路同步测试优点；通过配合使用有限元热仿真技术，分析了慢速烤燃条件下热防护层对引信体内导传爆药温度响应影响，确定了防护壳体材料可有效减少热量的传递；此外，在对聚四氟乙稀、铝镁质纤维、陶瓷隔热瓦材料（FRCI-12）、气凝胶毡4种防护添加材料的慢速烤燃仿真分析，证实了气凝胶毡的热防护效果最佳.

Research on Thermal Protection Efficiency of Insensitive Ammunition Fuze for Slow Cook-Off Environment

In order to meet the operational efficiency requirements of ammunition, many countries attach great importance to avoid the serial explosion of ammunition caused by accidental thermal stimulation. Usually, the thermal conductivity of metal fuze shell is large, and the heat conduction speed is fast after being stimulated by ambient heat, which seriously endangers the safety of subsequent detonators and explosives. In order to study the heat barrier ability of fuze protective shell material and further enhance the thermal protection effect of fuze, a controllable burning system based on quartz lamp array is developed for simulating thermal environment stimulation, and a multi-channel temperature measurement micro-system embedded in fuze is designed and implemented, which is proved to have high reliability and multi-channel embedding testing ablity. The advantages of synchronous test are analyzed. By using the finite element thermal simulation technology, the influence of thermal protection layer on the thermal response of the booster under slow cookoff condition is analyzed. The protective shell material can effectively reduce the heat transfer. In addition, numerical comparisons of four kinds of protective materials (PTFE, Al-Mg fiber, ceramic insulating tile material (FRCI-12) and aerogel felt) under slow cook-off conditions show that the thermal protection effect of aerogel felt is the best.