为研究不同热环境下隔热涂层结构对引信热防护性能的影响,以JHX-1装药的典型中大口径榴弹引信为研究对象,对无隔热涂层、单隔热涂层和复合隔热涂层引信体进行慢速烤燃与快速烤燃仿真分析。结果表明:在快速烤燃与慢速烤燃条件下,隔热涂层的设计均能延长引信热响应时间,其中在快速烤燃环境下的延时效果最明显为69.1%;相同热环境且整体隔热涂层厚度不变的情况下,单涂层隔热防护结构对响应时间的延时效果优于复合涂层隔热结构,其中在外壳涂覆阻燃隔热材料的防护性能最佳,快烤下延时效果为51.6%;对于涂覆厚度受限的引信体,可以考虑内/外复合隔热涂层结构,并在满足功能要求的基础上,通过增加外层材料涂覆厚度来提高复合涂层结构的热防护效果。

In order to study the effect of heat insulation coating structure on the thermal protection performance of fuzes in different thermal environments,the typical large-caliber grenade fuze of JHX-1 charge was taken as the research object,and the slow burning and fast burning simulation of fuzes with no heat insulation coating structure,single heat insulation coating structure and composite heat insulation coating structure were carried out.The simulation results show that the design of the thermal insulation coating structure can prolong the response time of the fuze under both fast and slow burning conditions,and the delay effect is the most obvious in the fast burning environment,the delay effect is 69.1%.Under the same thermal environment and the same thickness of the overall thermal insulation coating of the fuze,the delay effect of the single-coating thermal insulation structure on the response time is better than that of the composite coating thermal insulation structure,and the thermal protection performance is the best when the shell is coated with flame retardant thermal insulation material,and the delay effect is 51.6% under the fast burning ring.According to the comprehensive analysis,the inner/outer composite thermal insulation coating structure can be considered for the fuze body with limited coating thickness,and the thermal protection effect of the composite coating structure can be improved by increasing the coating thickness of the outer material on the basis of meeting the functional requirements of the fuze.