椭圆截面弹体贯穿有限厚金属靶特性研究  

Study on perforation of elliptical cross-section projectile into finitethick metal targets

作　　者：魏海洋 刘均伟 张先锋 刘闯 李鹏程 乔良 Haiyang Wei;Junwei Liu;Xianfeng Zhang;Chuang Liu;Pengcheng Li;Liang Qiao(School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China;Beijing Institute of Space Long March Vehicle,Beijing 100074,China)

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China [2]Beijing Institute of Space Long March Vehicle,Beijing 100074,China

出　　处：《Acta Mechanica Sinica》2023年第6期93-107,共15页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12141202 and 12202205);Fundamental Research Funds for the Central Universities(Grant No.30919011401).

摘　　要：本文结合弹性衰减-塑性衰减-开裂三阶段贯穿模型及椭圆截面弹体形状函数,建立了椭圆截面弹体贯穿有限厚金属靶侵彻模型.随后,开展了两种椭圆截面弹体及一种圆截面弹体以230~570 m/s的撞击速度对铝合金靶板的贯穿试验,且试验覆盖了弹道极限速度.在此基础上,采用本文及文献中的试验数据对模型进行了验证,模型的计算结果与试验结果吻合较好.此外,对比分析了椭圆截面弹体与圆截面弹体对有限厚金属靶的贯穿特性.结果表明,当椭圆截面弹体与圆截面弹体的质量、弹体头部长度、任意弹体截面面积及弹体长度相等时,二者可视为等效弹体.其次,确定了无量纲靶体临界厚度与弹体撞击因子间的关系.计算结果表明,无量纲靶体临界厚度与弹体撞击因子呈线性关系,同时,进一步分析了椭圆截面弹体头部形状因子对其贯穿特性的影响规律.The model of the elliptical cross-section projectile perforating finite-thick metal targets was developed by combining with the shape function of the elliptical cross-section projectile,where the elastic-decay,plastic-decay,cracking three-stage perforation model was employed.Then,experiments of projectile perforating finite-thick aluminum alloy targets were conducted,including two kinds of elliptical cross-section projectiles and one kind of circular cross-section projectile.The striking velocity of the projectile ranged from 230 m/s to 570 m/s,in which the ballistic limit velocity(BLV)was included.The existed and current experimental results were used to validate the model and agreed well with the calculation results.Besides,the perforation performance of elliptical cross-section projectile and circular cross-section projectile was analyzed.The results showed that the two can be regarded as equivalent projectiles when the mass,head length,any cross-sectional area,and length of projectiles were equal.Next,the critical non-dimensional target thickness was clarified under the different striking factors of the projectile.Calculation results showed that the critical non-dimensional target thickness had a linear relation with the striking factor of the projectile.Furthermore,the influences of the head shape factor of elliptical cross-section projectile on perforation characteristics were studied.

关 键 词：椭圆截面 临界厚度 金属靶 形状因子 截面面积 撞击速度 弹道极限速度 线性关系 

分 类 号：O3[理学—力学]