Optimal design of spherical segment liners in a new shaped charge

DOI:	10.11809/bqzbgcxb2023.05.005
Keywords:	spherical segment liner; structural parameters; shaped charge; optimization design; numerical simulation
Abstract:	In view of complex and diverse military targets in modern battlefields, this paper proposes a new shaped charge warhead with multiple damage modes, which can cause damage in the best way according to the type of the targets. LSDYNA 2D finite element simulation software is used to conduct numerical simulation of the new shaped charge, explore the specific influence of the material and structural parameters (curvature and wall thickness) of the liner on the performance of the new shaped charge, and optimize the design of the spherical segment liners. The results show that the numerical simulation results are in good agreement with the experimental data in literature ［17］. The auxiliary device in the new shaped charge structure can convert EFP (explosive forming projectile) into JPC or JET to realize the conversion of damage elements. The spherical segment curvature R=2D (charge diameter) is the critical value of the new shaped charge structure to form JPC or JET. The new shaped charge will form JPC when the curvature R is less than 2D (charge diameter), and will form JET when the curvature R is or more than 2D. The optimized material and structural parameters of the spherical segment liners are as follows: spherical segment curvature R= 2.5D , thickness h=0.033D, and the material is copper. Under these conditions, the penetration depth S reaches the maximum 292.1 mm, which is about 5 times of the charge diameter.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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