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 Shengjie Sun;Jianwei Jiang;Shuyou Wang;Jianbing Men;Mei Li

作者机构：State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081PR China Tangshan Research InstituteBeijing Institute of TechnologyTangshan 063000HebeiPR China 

出 版 物：《Defence Technology(防务技术)》 (Defence Technology)

年 卷 期：2023年第25卷第7期

页      面：249-262页

核心收录：

学科分类：08[工学] 0826[工学-兵器科学与技术] 082603[工学-火炮、自动武器与弹药工程] 

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

主　　题：Fluted liner Spin-compensation SPH Structural optimization 

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.