Structural design of the fluted shaped charge liner using multi-section optimization method  

作　　者：Shengjie Sun Jianwei Jiang Shuyou Wang Jianbing Men Mei Li 

机构地区：[1]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,PR China [2]Tangshan Research Institute,Beijing Institute of Technology,Tangshan 063000,Hebei,PR China

出　　处：《Defence Technology（防务技术）》2023年第7期249-262,共14页Defence Technology

基　　金：supported by the project of National Natural Science Foundation of China (NSFC, Grant No. 12032006)。

摘　　要：Spin effect of the small diameter shaped charge results in the centrifugal stress during the jet stretching process. Consequently, the jet scatters, which deceases the jet penetration capability. In the present study, a multi-section method was proposed to design the spin-compensation liner. The spincompensation rate(SCR) of the liner was defined as the specific angular velocity that a fluted liner can offset. Based on the plain stress theory, SPH numerical method was applied to study the converging process of the 2D fluted structure. The spin-compensation mechanism of the fluted structure was illustrated. Then, nine cross sections were chosen along the liner axis equidistantly. On each of the section, a 2D fluted structure was designed to offset a given initial angular velocity. After, the optimized fluted structures were integrated into a 3D fluted liner. Jet appearances of the normal liner and the fluted liners under different initial angular velocities were compared, which verifies the practicality of the multi-sectional method. The multi-section optimization method provides a new efficient method of designing the shaped charge liner for a specific usage.

关 键 词：Fluted liner Spin-compensation SPH Structural optimization 

分 类 号：TJ410.34[兵器科学与技术—火炮、自动武器与弹药工程]