考虑变形/侵蚀耦合的弹体横截面积理论模型  

A Theoretical Model for the Cross-sectional Area of a Projectile Considering Deformation and Erosion Coupling

作　　者：徐恒威 卢永刚[1] 李军润 冯晓伟[1] 卢正操 XU Hengwei;LU Yonggang;LI Junrun;FENG Xiaowei;LU Zhengcao(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《兵工学报》2024年第S01期97-104,共8页Acta Armamentarii

基　　金：国家自然科学基金青年科学基金项目(12202424)。

摘　　要：弹体以中高速侵彻混凝土介质时,弹靶之间的高压作用导致弹体出现严重变形。同时,剧烈的摩擦作用使得弹体质量出现侵蚀,进一步导致侵彻性能显著下降。为深入研究中高速条件下弹体的侵彻行为,基于空穴膨胀理论和Alekseevskii-Tate模型,分别获得侵彻模式转变时对应的临界速度。在此基础上,考虑中高速侵彻下弹体变形和质量侵蚀的耦合效应,进而构建中高速侵彻下弹体横截面积的理论模型。为验证理论模型的合理性及可靠性,与文献实验数据进行对比分析。实验结果表明:临界速度理论模型的预测结果与文献[6,11]实验数据吻合较好,证明了模型的准确性。中高速侵彻下弹体在变形、侵蚀效应的共同作用下,侵彻后横截面积随初始撞击速度近似呈指数增大。变形效应导致弹体镦粗,侵蚀效应使得弹体表面材料被逐渐剥落。When a projectile penetrates a concrete target at medium-highspeed,the high pressure between projectile and target induces severe deformation of the projectile.Concurrently,the intense friction results in the erosion of the projectile's mass,further resulting in a significant decrease in penetration performance.To delve into the penetration behavior of projectile under medium-highspeed conditions,the critical velocities corresponding to the transition in penetration modes are determined using the cavity expansion theory and the Alekseevskii-Tate model.Subsequently,considering the coupled effects of deformation and mass erosion during medium-highspeed penetration,a computational model for the cross-sectional area of projectileunder these conditions is constructed.To verify the rationality and reliability of the theoretical model,the calculated results are compared with the experimental data in Ref.[6,11].The results indicate that the theoretical model's predicted results of critical penetration velocities are in good agreement with the experimental data.Under the combined effects of deformation and erosion during medium-highspeed penetration,the cross-sectional area of the recovered projectile increases approximately exponentially with the initial impact velocity.The deforming effect causes theradial upsetting of projectile,while the erosion effect gradually strips away the surface material of projectile.

关 键 词：中高速侵彻 弹体变形 质量侵蚀 临界侵彻速度 横截面积 

分 类 号：O385[理学—流体力学]