基于连续压导探针的水箱法测量爆压

李科斌; 李晓杰; 王小红; 闫鸿浩; 曹景祥

doi:10.11858/gywlxb.20180652

基于连续压导探针的水箱法测量爆压

doi: 10.11858/gywlxb.20180652

李科斌^1,,
李晓杰^{1, 2,*, ,},
王小红¹,
闫鸿浩¹,
曹景祥³

1.
大连理工大学工程力学系，辽宁大连　116024
2.
工业装备结构分析国家重点实验室，辽宁大连　116024
3.
大连船舶重工集团爆炸加工研究所有限公司，辽宁大连　116311

基金项目: 国家自然科学基金（11272081, 11672067, 11672068）

详细信息

作者简介:
李科斌（1988－），男，博士研究生，主要从事爆炸与冲击动力学及其测试技术研究. E-mail: lkbin1988@mail.dlut.edu.cn

通讯作者:
李晓杰（1963－），男，博士，教授，博士生导师，主要从事爆炸加工及爆炸冲击动力学研究. E-mail: robinli@dlut.edu.cn

中图分类号: O521.3; TJ55
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出版历程
- 收稿日期: 2018-10-15
- 修回日期: 2018-11-27

A Modified Aquarium Test Using a Continuous Pressure-Conducted Velocity Probe for Measurement of Detonation Pressure

1.
Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China
2.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024, China
3.
Dalian Shipbuilding Industry Explosive Processing Research Co., Ltd., Dalian 116311, China

摘要

摘要: 为了使爆压测定方法更加方便并且更适合于野外大药量的测量，利用自行研制的压导式连续电阻丝探针，设计了一种改进水箱法，可在单次试验中连续记录炸药爆轰波和水中冲击波波阵面的运动轨迹。同时，为了进一步简化实验装置和操作过程，设计了基于连续压导探针的简化水箱法。利用以上两种实验装置，对不同组分的ANFO炸药进行爆压测量，获得了爆轰波-冲击波波阵面时程曲线。通过对爆轰波段数据拟合，得到了各待测炸药的爆速；利用贴近炸药区域介质中的冲击波数据，拟合得到初始冲击波速度，再结合水和有机玻璃的冲击Hugoniot曲线以及阻抗匹配原理，求解得到各待测炸药的CJ压力和绝热指数。实验结果表明，基于连续压导探针的改进水箱法可准确快捷地测量炸药的爆速、爆压等参数，可作为炸药性能测试技术的重要补充。
- 爆轰压力 /
- 水箱法 /
- 连续压导探针 /
- 阻抗匹配
Abstract: In order to measure the detonation pressure of large mass explosive more convenient in the field work, a modified aquarium test has been designed by using a self-developed continuous pressure-conducted velocity probe (CPVP). The method can continuously record the trajectories of detonation and shock wave fronts in a single test. In addition, a simplified aquarium test method based on the novel velocity probe was designed to further simplify the experimental setup and operation process. By using the two type of devices, detonation pressure measurements for the different ammonium-nitrate/fuel-oil (ANFO) ratio explosives were performed and the time history curves of detonation-shock wave fronts were measured. The detonation velocity of each shot was then obtained by fitting the detonation wave data, and the initial shock velocity was determined based on the shock wave data of the medium adjacent to the explosive. Based on the shock Hugoniot curves of water and Plexiglas, we calculated the CJ pressures and adiabatic exponents of each test based on impedance matching principle. The experimental results show that the CPVP-based aquarium test can measure the detonation velocity and detonation pressure accurately and efficiently. The CPVP-based aquarium test method will be a significant supplement technique for explosive performance estimation.
- detonation pressure /
- aquarium test /
- continuous pressure-conducted velocity probe (CPVP) /
- impedance matching

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图 1 连续压导探针示意

Figure 1. Schematic illustration of CPVP

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图 2 基于连续压导探针的改进水箱法测量系统

Figure 2. Detonation pressure measuring system with modified aquarium test using CPVP

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图 3 爆轰产物-介质界面的相互作用曲线

Figure 3. Impedance match method for the explosive product-media interface

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图 4 采用不同测试方法时连续压导探针测得的电压信号

Figure 4. Output voltage profiles of CPVPs by different test methods

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图 5 不同测试方法得到的爆轰波-冲击波时程曲线

Figure 5. Time history curves of detonation and shock wave front by different test methods

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图 6 不同比例ANFO/RDX炸药的电压信号

Figure 6. Output voltage profiles for different ANFO/RDX ratios

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图 7 ANFO/RDX混合炸药的爆轰波-冲击波时程曲线

Figure 7. Time history curves of detonation and shock wave front for composite ANFO/RDX explosive

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表 1 不同试验装置测得的炸药爆压

Table 1. Measuring results of detonation pressure by different methods

Test method	Shot No.	Inert material	Explosive component	Density/(g·cm^–3)	Detonation velocity/(km·s^–1)	Detonation pressure/GPa	γ
Fig. 2(a)	DP-1	Water	ANFO	0.860	3.7187	3.600	2.304
Fig. 2(b)	DP-2	Water	ANFO	0.860	3.6482	3.535	2.238
	DP-3	PMMA	ANFO	0.860	3.6540	3.524	2.258
	DP-4	PMMA	ANFO	0.865	3.6336	3.539	2.227
	DP-5	PMMA	100%ANFO+0%RDX	0.880	2.8978	2.394	2.086
	DP-6	PMMA	85%ANFO+15%RDX	0.832	4.2209	4.469	2.317
	DP-7	PMMA	50%ANFO+50%RDX	0.875	4.9798	6.446	2.366
Note: The ANFO of DP-1–DP-5 are powdery while those of DP-6 and DP-7 are granular.

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