CHINESE JOURNAL OF ENERGETIC MATERIALS
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孔内空气间隔对有/无金属罩聚能装药定向侵彻效果的影响
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1.北京理工大学爆炸科学与技术国家重点实验室,北京 100081;2.河南城建学院土木与交通工程学院,河南 平顶山 467036

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爆炸科学与技术重点实验室青年基金(QNKT23-09)


Effect of Air Gap in Borehole on Directional Penetration of Shaped Charge with/without Metal Liner
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Affiliation:

1.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology,Beijing 100081, China;2.School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036, China

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    摘要:

    为了探究孔内径向空气间隔对有/无金属罩聚能装药定向侵彻效果和炸药爆轰能量传递过程的影响,采用ANSYS/LS-DYNA软件,开展孔内装药空气间隔为6,8,10,12,14 cm时的数值模拟研究,分析了聚能装药中有药型罩形成EFP和无药型罩形成聚能气流的能量集中释放过程,以及对孔壁的定向侵彻深度。结果表明空气间隔小于10 cm时,聚能气流对孔壁的侵彻深度相对于EFP平均侵深分别提高了53%(6 cm)和29%(8 cm)。空气间隔大于10 cm时,EFP平均侵彻深度相比于聚能气流均增加了26%(12 cm和14 cm)。计算聚能轴线上EFP和聚能气流单位面积通过孔壁的动能,发现空气间隔较小时,聚能气流在空气中衰减耗散的能量小于EFP塑性变形耗能,此时聚能气流对孔壁的侵彻效果较优;空气间隔较大时,爆轰产物空间膨胀造成聚能气流轴线处的密度和动能显著降低,而EFP由于具有高密度和不可压缩性,能量分散小,动能衰减缓慢,此时EFP对孔壁的侵彻效果优于聚能气流。

    Abstract:

    In order to explore the influence of the radial air gap in the hole on the directional penetration effect of shaped charge with/without metal liner and the detonation energy transfer process of explosive, ANSYS/LS-DYNA software was used to carry out the numerical simulation study when the air gap of the charge in the hole was 6, 8, 10, 12, 14 cm. The process of centralized release of energy from the shaped charge with metal liner forming an EFP and without metal liner forming concentrated detonation product flow as well as the depth of directional penetration into the borehole wall, was analyzed. The results show that when the air gap is less than 10 cm, the penetration depth of concentrated detonation product flow into the hole wall is increased by 53% (6 cm) and 29% (8 cm), respectively, compared with the average penetration depth of EFP. When the air gap was greater than 10 cm, the average penetration depth of EFP increased by 26% (12 cm and 14 cm) compared with the concentrated detonation product flow. The kinetic energy of EFP and concentrated detonation product flow per unit area through the hole wall on the shaped energy axis was calculated, it is found that when the air gap is small, the energy dissipation of concentrated detonation product flow in the air is less than that of EFP plastic deformation, and the penetration effect of concentrated detonation product flow on the hole wall is better. When the air gap is large, the density and kinetic energy at the axis of the concentrated detonation product flow are significantly reduced due to the spatial expansion of detonation products, while the EFP has high density and incompressibility, small energy dispersion and slow decay of kinetic energy, so the penetration effect of EFP on the hole wall is better than that of the concentrated detonation product flow.

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引用本文

蔡静静,徐轩,陈占扬,等.孔内空气间隔对有/无金属罩聚能装药定向侵彻效果的影响[J].含能材料, 2024, 32(7):726-736. DOI:10.11943/CJEM2023196.
CAI Jing-jing, XU Xuan, CHEN Zhan-yang, et al. Effect of Air Gap in Borehole on Directional Penetration of Shaped Charge with/without Metal Liner[J]. Chinese Journal of Energetic Materials, 2024, 32(7):726-736. DOI:10.11943/CJEM2023196.

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历史
  • 收稿日期: 2023-09-11
  • 最后修改日期: 2023-12-10
  • 录用日期: 2023-12-04
  • 在线发布日期: 2023-12-07
  • 出版日期: 2024-07-25