用PVDF压力计研究未反应JB-9014钝感炸药的Grüneisen参数

刘俊明; 张旭; 赵康; 覃双; 裴红波; 张蓉

doi:10.11858/gywlxb.20180524

用PVDF压力计研究未反应JB-9014钝感炸药的Grüneisen参数

doi: 10.11858/gywlxb.20180524

刘俊明^1,,
张旭^2,*, ,,
赵康¹,
覃双¹,
裴红波²,
张蓉²

1.
中国工程物理研究院研究生部, 四川绵阳 621999
2.
中国工程物理研究院流体物理研究所, 四川绵阳 621999

基金项目:

国防科工局技术基础科研项目 JSZL2016212C001

科学挑战专题 TZ2018001

详细信息

作者简介:
刘俊明(1990-), 男, 硕士研究生, 主要从事炸药状态方程研究.E-mail:13521934162@163.com

通讯作者:
张旭(1972-), 男, 博士, 研究员, 主要从事流体动力学研究.E-mail:caepzx@sohu.com

中图分类号: O521.3
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出版历程
- 收稿日期: 2018-03-12
- 修回日期: 2018-03-23

Using PVDF Gauge to Study Grüneisen Parameter of Unreacted JB-9014 Insensitive Explosive

1.
The Graduate School of CAEP, Mianyang 621999, China
2.
Institute of Fluid Physics, CAEP, Mianyang 621999, China

摘要

摘要: 为了获得未反应JB-9014炸药的Grüneisen参数Γ，在火炮加载平台上对JB-9014炸药进行一维平面冲击实验。实验中，将炸药样品安装于两个铜板之间，两个PVDF压力计分别安装在炸药样品前表面和中部，记录两个位置处的压力随时间的变化历程；将圆形铜板作为飞片安装于弹托前表面，利用火炮加速弹托，使飞片以一定速度撞击样品装置前铜板，前铜板中产生右行冲击波对炸药样品形成一次压缩；随后冲击波在炸药样品/后铜板交界面发生反射，产生左行冲击波对炸药样品形成二次压缩。假设炸药样品的Grüneisen参数Γ为常数，计算不同Γ值下炸药样品前表面和中部压力随时间的变化历程，将不同Γ下的计算值与实验值进行对比，获得了JB-9014钝感炸药Grüneisen参数的最优值，为1.7。
- JB-9014炸药 /
- PVDF压力计 /
- Grüneisen参数 /
- 最优值
Abstract: In order to obtain the Grüneisen parameter Γ of unreacted JB-9014 insensitive explosive, we carried out the one-dimensional plane impact experiment on JB-9014 explosive using a gun.In the experiment, the explosive sample was mounted between two copper plates, and two PVDF gauges were installed at the front and the middle of the explosive sample to record the variations of pressure versus time.The copper flyer was accelerated by a gun and then impacted the front copper plate at a certain speed.The right row shock wave was formed in the front copper plate, resulting in the first compression of the explosive sample and then reflected at the interface of the explosive sample and the rear copper plate, causing the second compression of the explosive sample.Supposing the Grüneisen parameter of the explosive sample was constant, we calculated the variations of pressure versus time at the front and the middle of the explosive sample with different Grüneisen parameters.Comparing these calculated values with the experimentally determined parameters enabled optimum values of the Grüneisen parameter to be identified.
- JB-9014 explosive /
- PVDF gauge /
- Grüneisen parameter /
- optimum value

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图 1 实验装置示意

Figure 1. Illustration of experimental setup

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图 2 位置-时间关系

Figure 2. x-t relation

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图 3 压力-粒子速度关系

Figure 3. p-u relation

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图 4 第1发实验中示波器记录的结果

Figure 4. Results recorded by oscilloscope in the first experiment

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图 5 不同撞击速度下炸药的压力-时间曲线

Figure 5. Pressure-time curves of explosive under different impact velocities

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图 6 未反应JB-9014炸药的D-u关系

Figure 6. D-u relation of unreacted JB-9014 explosive

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图 7 d_av-Γ关系

Figure 7. d_av-Γ relation

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表 1 压力计2记录的压力-时间关系

Table 1. Pressure-time relation recorded by Gauge 2

Exp.No.	Experimental data				Calculation data with Γ=1.7				d
Exp.No.	t_A/μs	t_B/μs	p_A/GPa	p_B/GPa	t_A/μs	t_B/μs	p_A/GPa	p_B/GPa	Point A	Point B
Shot 1	1.467 0	3.833 0	3.512 7	5.720 0	1.403 0	3.772 8	3.617 5	5.719 9	0.053 9	0.021 9
Shot 2	1.324 0	3.423 6	4.880 0	8.130 0	1.283 0	3.469 3	5.102 8	8.125 0	0.054 1	0.006 6
Shot 3	1.250 0	3.222 0	6.064 0	10.511 0	1.200 0	3.243 7	6.580 0	10.494 5	0.091 5	0.003 1
Shot 4	1.209 0	3.046 0	6.750 0	14.421 3	1.201 0	3.162 9	7.217 0	11.514 3	0.076 9	0.255 2^*
Note:Asterisk represents incorrect data which would be ignored.

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表 2 冲击波速度-粒子速度关系

Table 2. Shock-wave velocity vs.particle velocity

Exp.No.	u/(km·s^-1)	D/(km·s^-1)
Shot 1	0.574 0	3.647 4
Shot 2	0.735 0	3.990 2
Shot 3	0.913 0	4.369 3
Shot 4	1.084 0	4.740 0
Shot 5^[28]	0.480 0	3.433 0
Shot 6^[28]	0.618 0	3.788 0
Shot 7^[28]	0.779 0	4.028 0
Shot 8^[28]	0.963 0	4.501 0
Shot 9^[28]	0.481 0	3.408 3
Shot 10^[28]	0.604 0	3.776 5
Shot 11^[28]	0.639 0	4.000 0
Shot 12^[28]	0.813 0	4.135 7

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表 3 Γ和d_av数据

Table 3. Γ and d_av

Γ	d_av
1.0	0.057 81
1.1	0.055 14
1.2	0.052 44
1.3	0.049 82
1.4	0.047 65
1.5	0.046 03
1.6	0.044 60
1.7	0.044 01
1.8	0.045 92
1.9	0.049 05
2.0	0.052 44
2.1	0.055 95
2.2	0.059 55
2.3	0.063 22
2.4	0.066 97
2.5	0.070 79
2.6	0.074 67
2.7	0.078 61
2.8	0.082 61
2.9	0.086 66

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