一种PETN基超薄片炸药的爆轰性能及比冲量特性

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中图分类号：0381 国标学科代码：13035 文献标志码：A

Abstract：The sheet explosive loading technology is acrucial method for evaluating thedynamic response of the space structureundertheX-rayradiationinlaboratory.Toachievetheultra-lowspecificimpulseexplosiveloadingrequired forthe structuralassssmentofnew space vehicles，asheet explosivehasbeendeveloped，primarilyomposedofPETNas the main explosive and polymer rubber as the binder.The mass fraction of PETN is 9 0 % 9 2 % ，the thickness range is 0 . 1 5-0 . 2 0 m m ，the density range is ， and the explosive velocity range is 7 . 4 4-7 . 7 1 k m / s ：Toverify the high-impact initiation sensitivityof thesheet explosive，threeroundsofverificationexperiments weredesignedbasedontheblastmarketingmethod. Inthe experiment，the shet explosive was directly applied to the effect plate ora certain air gap reserved betweenthe sheet explosiveandtheefect plate.Thedetonationof the explosive was confirmedby examining the explosive marks lefton the effect plate post-explosion. The experimental results show that the sheet explosive with a thickness of 0 . 1 5-0 . 5 0 m m can be reliably detonated by a mild detonating fuse with a charge line density of ，and the explosive strips with a thickness of canreliably transmit detonation.The specific impulse characteristics of the sheet explosives with different diameters and thicknesses were measuredand studiedbythe impact pendulum measurement device. Combined with theoretical analysis，the specificimpulsecalculationmodelof thesheet explosive wasused toperformpolynomial ftingonthe specific impulse direct measurement data of the sheet explosives with the thicknesses of 0.20， 0.30， 0.40 and ，respectively.

Thespecific impulse values of shet explosives with four thickness were linearly fitted.Theresults showthatthe specific impulse of the sheet explosive is proportional to the thickness and the ratio coefficient is 3 4 1 8 . 5 6 P a ⋅ s / m m The development of ultra-thin sheet explosive with a thickness of 0 . 2 m m and a specific impulse of about 6 8 0 P a ⋅ s was successfully realized.

Keywords：ultra-thin sheet explosive; PETN; mild detonating fuse; detonation performance; specific impulse

当强脉冲X射线作用到空间飞行器结构表面时，会导致表层材料熔化、汽化，产生物质反冲喷射现象，继而形成作用在飞行器结构表面的反向喷射冲量载荷，引起结构的动态响应[1-2]。（剩余12669字）