考虑约束条件的CL-20基PBX炸药装药非冲击点火反应特性

王佳敏; 李晓; 姚奎光; 陈鹏万; 王书记; 刘睿

doi:10.11883/bzycj-2025-0053

考虑约束条件的CL-20基PBX炸药装药非冲击点火反应特性

doi: 10.11883/bzycj-2025-0053

王佳敏^1,,
李晓²,
姚奎光²,
陈鹏万¹,
王书记^1, ,,
刘睿^1, ,

1.
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
2.
中国工程物理研究院化工材料研究所，四川绵阳 621999

基金项目: 国家自然科学基金（12272051）

详细信息

作者简介:
王佳敏（1998－　），男，博士研究生，3120245210@bit.edu.cn

通讯作者:
王书记（1992－　），男，博士，nucwsj@126.com

刘　睿（1985－　），男，博士，副教授，liurui1985@bit.edu.cn

中图分类号: O385
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- 被引次数: 0
出版历程
- 收稿日期: 2025-02-19
- 修回日期: 2025-04-14
- 网络出版日期: 2025-04-16
- 刊出日期: 2026-09-01

Experimental study on non-shock initiation reaction characteristics of CL-20-based PBX explosive charge considering constraint conditions

WANG Jiamin^1
,,
LI Xiao²,
YAO Kuiguang²,
CHEN Pengwan¹,
WANG Shuji^{1
, ,},
LIU Rui^{1
, ,}

1.
State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, China
2.
Institute of Chemical Materials, CAEP, Mianyang 621999, Sichuan, China

摘要

摘要: 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。
- CL-20 /
- 炸药装药 /
- 约束条件 /
- 压力演化 /
- 反应特性
Abstract: 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.
- CL-20 /
- explosive charge /
- constraint conditions /
- pressure evolution /
- reaction characteristics

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图 1 试验装置示意图

Figure 1. Diagram of test device

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图 2 试验现场布局照片

Figure 2. Photo of test site layout

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图 3 CL-20基PBX裸药柱

Figure 3. CL-20-based PBX bare explosive

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图 4 不同机械约束条件下壳体膨胀破碎与炸药反应演化过程

Figure 4. Evolution process of shell fragmentation and explosive reaction under different constraints

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图 5 不同约束装药反应后的壳体残骸及底座变形情况

Figure 5. Deformation of shells and bases after reaction of different constrained charge

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图 6 不同约束条件下壳体内部压力变化情况

Figure 6. Change of internal pressure of shell under different constraints

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图 7 CL-20裸药静爆试验现场布置

Figure 7. Layout of CL-20 bare powder static explosion test site

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图 8 不同约束条件下装药反应冲击波超压情况

Figure 8. Overpressure of shock wave under different constraint conditions

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图 9 不同机械约束下各距离处超压峰值

Figure 9. The overpressure peak at each distance under different mechanical constraints

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图 10 超压峰值拟合曲线

Figure 10. Overpressure peak fitting curve

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图 11 不同约束条件下装药的反应度

Figure 11. Reaction degree of charge under different constraint conditions

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表 1 试验约束条件

Table 1. Test constraints

编号	h/mm	p_s /MPa
1#	20	50
2#	20	2
3#	6	50
4#	6	2

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表 2 不同约束条件下各位置处的超压峰值

Table 2. The overpressure peak at each position under different constraints

试验	h/mm	p_s/MPa	R/m	超压峰值/MPa
试验	h/mm	p_s/MPa	R/m	通道1	通道2	通道3
1	20	50	0.75	−	−	−
			1.25	−	−	−
			1.75	0.134	0.091	0.113
2	20	2	0.75	0.480	0.517	0.499
			1.25	0.230	0.170	0.200
			1.75	0.082	0.092	0.087
3	6	50	0.75	0.319	−	0.319
			1.25	0.096	0.086	0.091
			1.75	0.043	0.044	0.0435
4	6	2	0.75	0.255	0.268	0.2615
			1.25	0.087	0.081	0.084
			1.75	0.042	0.041	0.0415

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