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Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 6: 8 - 13

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.06.002

Numerical Investigation on the Initiation Mechanism of Covered Charge with Variable Thickness Shell Impacted by Rod Jet

  • JIANG Wencan 1 ,
  • FU Dan 2 ,
  • LIANG Bin 1 ,
  • LU Yonggang 1
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  • 1 Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China
  • 2 Project Management Center of PLA Rocket Force Equipment Department,Beijing 100085,China

Received date: 2023-05-04

  Online published: 2024-12-30

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Abstract

Based on the arbitrary Lagrangian-Eulerian (ALE) fluid structure coupling algorithm, the initiation mechanism of covered charge with variable thickness shell impacted by a rod jet (the head velocity of the jet is 6 556 m·s-1) is studied. The results show that with the increasing of the thickness of the shell, the initiation mechanism of the covered charge changes from the preshock wave and compressional wave initiation mode to the jet directly impact initiation mode. The shell of the covered charge thickness is 1.4D(D is the caliber of charge). When the thickness of the covered charge exceeds 3.1D, the jet fails to initiate detonation of the covered charge. For thick-walled charges, as the thickness of the covered plate increases, the precursor shock wave generated by the jet impacting the covered plate may fail to initiate detonation of the shielding explosive, resulting in a change in detonation mode to direct penetration of the jet for initiating detonation. Additionally, variations in thickness of the covered plate significantly affect impact initiation distance for thick-walled charges with respect to covered charge.

Key words： K-charge; rod jet; impact initiation; covered charge; preshock

Cite this article

JIANG Wencan , FU Dan , LIANG Bin , LU Yonggang . Numerical Investigation on the Initiation Mechanism of Covered Charge with Variable Thickness Shell Impacted by Rod Jet[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(6) : 8 -13 . DOI: 10.15892/j.cnki.djzdxb.2023.06.002

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