20 GPa斜波压缩下PBX-14炸药的动力学响应

种涛; 莫建军; 傅华; 郑贤旭; 李涛; 张旭

doi:10.11858/gywlxb.20210877

20 GPa斜波压缩下PBX-14炸药的动力学响应

doi: 10.11858/gywlxb.20210877

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: 冲击波物理与爆轰物理重点实验室基金（6142A03192007）；挑战计划专题（TZ2018001）；基础加强项目（2019-JCJQ-ZD-203）

详细信息

作者简介:
种　涛（1986－），博士，助理研究员，主要从事动态加载实验技术和材料动力学特性研究.E-mail：maoda318@163.com

通讯作者:
张　旭（1972－），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: O345; TJ55
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出版历程
- 收稿日期: 2021-09-13
- 修回日期: 2021-10-10

Dynamic Response of PBX-14 under Ramp Wave Compression up to 20 GPa

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 利用磁驱动加载实验技术和激光干涉测速技术，开展了未反应固体TATB基PBX-14炸药的斜波压缩实验，获得了20 GPa峰值压力下PBX-14炸药的后表面速度波剖面实验数据。基于阻抗匹配修正的迭代Lagrange数据处理方法处理实验数据，获得了0～20 GPa压力范围内PBX-14炸药的压力-相对比容关系、高压声速-粒子速度关系等动力学特性参数。结合等熵状态方程和由实验获得的动力学参数，对PBX-14炸药的斜波压缩实验过程开展了一维流体动力学数值模拟，计算结果与实验结果吻合良好，验证了本实验方法、数据处理方法及选取的物理模型的正确性。
- PBX-14 /
- 状态方程 /
- 斜波压缩 /
- 声速
Abstract: The dynamic response of unreacted solid TATB-based explosive PBX-14 under ramp wave compression up to 20 GPa was obtained with the magnetically driven loading technique and laser interferometry technique. The pressure-relative specific volume relationship and dynamic parameters, such as the high-pressure sound velocity and particle velocity relationship c_L=2.53+3.12u_p of PBX-14 under ramp wave compression from 0 to 20 GPa were calculated by the iterative Lagrange data processing method based on impedance matching modification. The one-dimensional hydrodynamic numerical simulation of this experimental process was carried out with the isentropic equation of state and dynamic parameters obtained from the experiment. The calculation results agree well with the experimental results, which verifies the correctness of the experimental method, data processing method, and selected physical models in this work.
- PBX-14 /
- equation of state /
- ramp wave compression /
- sound velocity

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图 1 负载区结构示意图

Figure 1. Schematic of the loading area

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图 2 Shot948的界面速度波剖面

Figure 2. Interface velocity profiles of Shot948

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图 3 Shot948的压力边界

Figure 3. Pressure boundary of Shot948

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图 4 拉氏声速-原位粒子速度关系

Figure 4. Lagrange sound velocity-particle velocity relationship

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图 5 压力-相对比容关系

Figure 5. Pressure-relative specific volume relationship

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图 6 计算与实验速度波剖面

Figure 6. Calculated and experimental velocity profiles

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表 1 实验条件

Table 1. Experimental conditions

Shot No. Load voltage/kV Sample thickness/mm

Shot948 0.638
75 0.624
0.485

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表 2 数值模拟的动力学参数

Table 2. Dynamic parameters for simulation

Material $\;\rho $₀/(g∙cm⁻³) c₀/(km∙s⁻¹) s $\gamma $₀

PBX-14 1.905 2.530 3.120 1.15
Al^[15] 2.707 5.328 1.338 1.97
LiF^[15] 2.638 5.150 1.350 1.69

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