刚性椭圆截面弹体侵彻性能理论研究  

Theoretical Study on Penetration Performance of Rigid Elliptical Cross-section Projectile

作　　者：戴湘晖[1] 王可慧[1] 周刚[1] 李明[1] 沈子楷 李鹏杰[1] 段建[1] 吴海军[1] 杨慧[1] DAI Xianghui;WANG Kehui;ZHOU Gang;LI Ming;SHEN Zikai;LI Pengjie;DUAN Jian;WU Haijun;YANG Hui(Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西北核技术研究所,西安710024

出　　处：《现代应用物理》2024年第6期130-139,共10页Modern Applied Physics

基　　金：国家重点研发基金资助项目(YF-20230309)。

摘　　要：为获取椭圆截面弹体对半无限混凝土靶的侵彻性能,开展了理论建模及侵彻深度随长短轴比的变化规律研究。建立了椭圆截面弹体的通用几何模型,获得了弹体头部曲面方程,将靶体阻应力二次多项式函数在头部曲面积分得到了弹体的轴向阻力表达式,并基于运动学求解得到了弹体半无限侵彻深度的解析解。采用实验数据对理论模型进行验证,理论模型预测侵彻深度与实验数据的相对偏差不超过16.4%,验证了理论模型的准确性。采用理论模型研究发现,椭圆截面弹体相对等效圆截面弹体存在侵彻深度增益现象,且增益随长短轴比增大而增大;速度越高,侵彻深度增益越显著;当弹体头部长度较大时,等效圆截面弹体自身侵彻性能已足够优越,椭圆截面弹体的侵彻深度增益逐渐减小。研究成果可为椭圆截面弹体实际工程设计提供参考。To investigate the penetration performance of elliptical cross-section projectile into semi-infinite concrete target,the theoretical modeling and the variation of penetration-depth with the major-minor axis ratio is studied.A general geometric model of the elliptical cross-section projectile is established,and the projectile nose surface equation is obtained.The resistance stress quadratic polynomial function of the target is integrated on the nose surface to obtain the expression of the axial resistance of the projectile,then the semi-infinite penetration-depth formula is presented by solving the motion process.The penetration-depths predicted by the proposed theoretical model are compared with the experimantal data,and the relative deviation between them does not exceed 16.4%,which verified the accuracy of the proposed theoretical model.According to the theoretical model,it is found that the elliptical cross-section projectile has penetration-depth increment relative to the equivalent circular-section projectile,and the penetration-depth increment increased with the major-minor axis ratio.In addition,the higher the velocity,the more significant the penetration-depth increment.However,if the nose length is sufficient,the penetration performance of the equivalent circular-section projectiles is adequate;thus,the penetration-depth increment became insignificant.This preliminary study provides guidance for the engineering design of the elliptical cross-section projectile.

关 键 词：椭圆截面 弹体 侵彻 混凝土 侵彻深度增益 

分 类 号：O385[理学—流体力学] TJ760[理学—力学]