Structure optimization of linear shaped charge based on different explosives

Abstract

AbstractIn order to improve the damage ability of traditional shaped charge, a special linear shaped charge is designed. The driving characteristics of B explosive, HMX based explosive (JO‐8) and CL‐20 based explosive on linear explosively formed projectile (LEFP) are compared. The forming effect of LEFP is analyzed, the structural parameters of LEFP are designed, and the structure of shaped charge is optimized by combining genetic algorithm (NSGA‐II) and sequence quadratic programming (NLPQL). The Pulsed X‐ray experiment of scale LEFP is carried out. The results show that: (1) under the same structure, the LEFP formed by the shaped charge using CL‐20 explosive has better performance; (2) the LEFP formed by optimized B explosive is superior to that formed by unoptimized JO‐8 explosive, while LEFP formed by optimized JO‐8 explosive is superior to that formed by CL‐20 explosive, which indicates that explosives with lower energy density can also produce better LEFP after optimization; (3) The experimental results are consistent with the numerical results, which verifies the reliability of the numerical simulation and the effectiveness of the optimization method.