Numerical simulation of the influence of different liner structures on the formation and penetration performance of annular EFP

DOI:	10.11809/bqzbgcxb2024.10.011
Keywords:	annular EFP; shaped charge liner; penetration; numerical simulation
Abstract:	To investigate the effects of different liner structures on the formation and penetration performance of annular EFP, numerical simulation and comparative analysis were conducted on the annular liner using LS DYNA dynamic analysis software. Firstly, three typical types of propellant liner structures were designed: annular conical liner, annular hemispherical liner, and annular sub hemispherical liner. Numerical simulations showed that the annular EFP formed by annular sub hemispherical liner had the best forming effect and penetration effect, but the attitude of the annular EFP during the forming process still showed a tendency to deviate outward. Further adopting the concept of variable wall thickness design, an optimized design was carried out for the annular sub hemispherical cover. When the wall thickness offset is 0.15, the formed annular EFP not only has excellent flight stability, but also has the best forming and penetration effects. This study has certain guiding significance for the structural design of annular shaped charge covers.
Issue:	Vol. 45 No. 10 (2024)
Published:	2024-10-31
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