约束方式和强度对HMX基压装含铝炸药慢烤响应特性的影响  

Effects of Restraint Mode and Strength on Slow Cook-off Response Characteristics of HMX-based Pressed Aluminized Explosive

作　　者：董泽霖 屈可朋[1] 胡雪垚 沈飞[1] 肖玮[1] DONG Ze-lin;QU Ke-peng;HU Xue-yao;SHEN Fei;XIAO Wei(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《火炸药学报》2023年第10期897-904,I0009,共9页Chinese Journal of Explosives & Propellants

基　　金：国防重大基础研究专项。

摘　　要：为了获取不同约束方式和强度下HMX基压装含铝炸药慢速烤燃响应特性,以典型超音速钻地/侵爆战斗部为背景,设计了装药长径比为5∶1的缩比烤燃弹;开展了无约束和不同约束强度下HMX基压装含铝炸药慢速烤燃实验;获取了无约束条件下HMX基压装含铝炸药的反应过程,以及不同壳体壁厚(4、10、16和20mm)与端盖螺纹长度(10、12和14mm)时装药反应烈度的变化规律。结果表明,慢速烤燃条件下该HMX基压装含铝炸药反应包括生成气体、端面燃烧、火焰熄灭3个阶段;烤燃弹约束强度影响装药烤燃时间和点火温度,进而影响烤燃弹内部反应压力增长,最终导致不同的反应等级;当螺纹长度(L)为14mm时,壳体厚度(δ)由4mm增加至20mm,反应等级由爆燃发展为爆炸而后降低为燃烧;当壳体壁厚(δ)为10mm时,螺纹连接长度(L)由10mm增加至14mm,烤燃弹反应等级由燃烧转变为爆炸;当壳体壁厚(δ)与等效壳体壁厚(δe)相当时,烤燃弹约束强度较为均匀,有利于反应压力的不断增长,最终导致烤燃弹发生更为剧烈的爆炸反应。In order to obtain the slow cook-off response characteristics of HMX-based pressed aluminized explosives under different restraint modes and strengths,a scaled cook-off bomb with charge length-diameter ratio of 5∶1 was designed based on a typical supersonic ground penetration warhead.The slow cook-off experiments of HMX-based aluminized explosives under unrestrained and different restrained strengths were carried out.The reaction violence of HMX-based pressed aluminized explosives under unconstrained conditions,and the variation of charge reaction violence with different shell thickness(4,10,16 and 20 mm)and end cover thread length(10,12 and 14 mm)were obtained.The results show that under the condition of slow cook-off,the HMX-based aluminized explosive reaction includes three stages:gas generation,combustion at the end cap and flame extinguishment.The restraint strength of the slow cook-off bomb affects the ignition time and temperature of the charge,and then affects the increase of the internal reaction pressure of the bomb,and finally leads to different reaction violence.When the thread length(L)is 14 mm,with the shell thickness(δ)from 4 mm to 20 mm,the reaction violence develops from deflagration to explosion and then weakens to combustion;when the shell wall thickness(δ)is 10 mm,with the thread connection length(L)increases from 10 mm to 14 mm,the reaction violence changes from combustion to explosion.When the shell wall thickness(δ)is equal to the equivalent shell wall thickness(δe),the restraint strength of the slow cook-off bomb is more uniform,which is beneficial to the continuous growth of the reaction pressure,and finally leads to a more violentexplosion reaction of the slow cook-off bomb.

关 键 词：爆炸力学 HMX基压装含铝炸药 慢速烤燃 约束强度 响应特性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O389[理学—流体力学]