聚能射孔弹粉末药型罩本构参数反演研究  

Constitutive parameters for powder liner in shaped charge:An inversion study

作　　者：叶贵根[1] 孟康 YE Guigen;MENG Kang(School of Pipeline and Civil Engineering,China University of Petroleum,Qingdao 266000,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266000

出　　处：《实验技术与管理》2024年第9期92-100,共9页Experimental Technology and Management

基　　金：国家自然科学基金项目(11972376);山东省自然科学基金项目(ZR2019MA007);中央高校基本科研专项(22CX03014A)。

摘　　要：为了获得能够准确描述聚能射孔弹中粉末药型罩在高温、高压、大变形条件下力学行为的Johnson-Cook(J-C)本构参数,使其适用于射孔的数值模拟,该文提出了一种基于有限元仿真的药型罩本构反演方法。搭建了地面射孔实验,并使用ANSYS/LS-DYNA对聚能射孔弹侵彻钢靶的过程进行动态仿真,系统分析了各本构参数对射孔深度和射孔孔径的影响规律,再利用响应曲面法和多目标遗传算法结合实验数据对粉末药型罩的J-C本构参数进行反演,最后基于反演得到的粉末药型罩本构参数开展射孔过程数值模拟,并与实验结果进行对比验证。结果表明:模拟得到的射孔深度、射孔孔径与实验数据间的误差均小于5%,并且射流形态和射流速度与实验结果具有很好的吻合度,表明反演所得的粉末药型罩本构参数能够较为可靠地反映其在射孔过程中的变形流动行为。[Objective]Powder liners,a new type of liner with superior performance compared with conventional liners,have been recently widely used in perforation operations.However,accurately determining the constitutive parameters that reflect the behavior of powder liners under perforating detonation conditions remains challenging.This limitation hinders the optimization of perforating charge structures and further study of the perforating process.The complex fabrication processes(pressing and sintering)and high strain rates of metal jets during perforation make conventional material property experiments unsuitable for this application.To precisely depict the mechanical behavior of powder liners under elevated temperatures,intense pressures,and substantial deformations and to render them suitable for numerical simulations of perforation,herein,we propose a constitutive parameter inversion method based on ground perforating experiments,finite element simulation,and multiobjective optimization.[Methods]First,a shooting experiment using 45 steel was conducted to provide data support for subsequent parameter inversion and to verify the effect of parameter inversion through projectile flow imaging in a shaped charge.Subsequently,a dynamic simulation using ANSYS/LS-DYNA was conducted to analyze the process of shaped charge penetration into a steel target.Building upon this foundation,we systematically examined the influence of constitutive parameters on perforation depth and perforation aperture.Through this comprehensive analysis,three parameters were identified as having the most substantial impact on the perforation simulation results.To improve inversion efficiency,this study fixed the values of other constitutive parameters with insignificant effects according to the literature.Only three main control parameters were selected as inversion variables,with perforation depth and aperture as target variables.The response surface method was used to derive a reliable representation of the target variable concerning the inversion

关 键 词：射孔实验 射孔数值模拟 Johnson-Cook本构 响应曲面法 多目标遗传算法 

分 类 号：TJ510[兵器科学与技术—军事化学与烟火技术] TD235[矿业工程—矿井建设]