考虑约束条件的CL-20基PBX炸药装药非冲击点火反应特性OA
Experimental study on non-shock initiation reaction characteristics of CL-20-based PBX explosive charge considering constraint conditions
为研究约束条件对 CL-20 基高聚物粘结炸药(polymer bonded explosive,PBX)非冲击点火后反应特性的影响,设计了一种可变约束的点火试验装置,结合高速摄像机和压力传感器,对不同约束条件下 CL-20 基 PBX 炸药反应剧烈程度、反应压力增长和空气冲击波超压进行分析.进一步与其完全爆轰空气超压峰值对比,分析了约束条件与炸药装药反应度之间的关系.研究结果表明,CL-20 基 PBX 炸药在约束条件下的非冲击点火反应过程分为反应压力缓慢增长和反应压力快速增长两个阶段,随着约束强度增大,两个反应阶段区分逐渐不明显.约束条件对炸药装药的反应度影响显著,当壳厚为 6 mm、约束片强度为 2 和 50 MPa 时,炸药反应度分别为 0.11 和 0.14;当壳厚为 20 mm,约束片强度为 2 MPa 时,装药反应度为 0.31.由此可见,通过减弱机械约束强度,能够有效降低 CL-20 基 PBX 炸药装药反应剧烈程度.
In order to study the influence of constraint conditions on the non-shock ignition reaction process of CL-20-based polymer bonded explosive(PBX)explosives,an ignition test device with adjustable mechanical constraints was used to study the reaction evolution behavior of PBX explosives under different constraints.Based on the high-speed camera image and the recovered shell wreckage,the influence of constraint conditions on the reaction rate and reaction intensity of the charge was analyzed respectively.The pressure change in the process of charge reaction was recorded by pressure sensor,and the evolution behavior of non-shock ignition reaction of explosive was analyzed.The overpressure time history of air shock wave at different positions was measured by overpressure sensor,and the detonation test of PBX was carried out.Based on the overpressure peak at the same position of the two types of tests,the relationship between constraint conditions and charge reactivity was further analyzed.The results show that weakening the mechanical constraint strength can reduce the reaction rate and the reaction intensity of the explosive.According to the pressure growth rate,the non-shock ignition reaction process under the constraint condition is divided into two stages.As the constraint strength increases,the distinction between the two reaction stages is gradually not obvious,and the first stage quickly transitions to the second stage.The parameters determined in the calculation formula of detonation overpressure peak of CL-20-based PBX explosive are A=0.289,B=-1.041,and C=2.224.The constraint conditions have a significant effect on the reactivity of the explosive charge.When the shell thickness is 6mm and the strength of the constraint plate is 2 MPa and 50 MPa,the reactivity of the explosive is 0.11 and 0.14,respectively.When the shell thickness is 20 mm and the strength of the constraint plate is 2 MPa,the charge reactivity is 0.31.It can be seen that the reaction intensity of CL-20-based PBX explosive can be effectively reduced by weakening the mechanical constraint strength.
王佳敏;李晓;姚奎光;陈鹏万;王书记;刘睿
北京理工大学爆炸科学与安全防护全国重点实验室,北京 100081中国工程物理研究院化工材料研究所,四川 绵阳 621999中国工程物理研究院化工材料研究所,四川 绵阳 621999北京理工大学爆炸科学与安全防护全国重点实验室,北京 100081北京理工大学爆炸科学与安全防护全国重点实验室,北京 100081北京理工大学爆炸科学与安全防护全国重点实验室,北京 100081
数理科学
CL-20炸药装药约束条件压力演化反应特性
CL-20explosive chargeconstraint conditionspressure evolutionreaction characteristics
《爆炸与冲击》 2026 (9)
53-63,11
国家自然科学基金(12272051)
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