椭圆截面弹体侵彻多层混凝土靶的数值仿真  

Numerical Simulation of Elliptical Cross‑Section Projectile Penetrating into Multi‑Layer Concrete Target

作　　者：薛颖杰 陈智刚[2] 杨芮 崔晋 康彦姝 付建平[2] XUE Yingjie;CHEN Zhigang;YANG Rui;CUI Jin;KANG Yanshu;FU Jianping(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;National Defense Key Laboratory of Underground Target Damage Technology,North University of China,Taiyuan 030051,China;No.803 Factory,Xi’an 710043,China;Jinxi Industries Group Co.,Ltd.,Taiyuan 030027,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中北大学地下目标毁伤技术国防重点学科实验室,山西太原030051 [3]国营803厂,陕西西安710043 [4]晋西工业集团有限公司,山西太原030027

出　　处：《中北大学学报(自然科学版)》2025年第1期35-44,共10页Journal of North University of China(Natural Science Edition)

摘　　要：为研究椭圆截面弹体侵彻多层间隔混凝土靶的稳定性是否优于传统等截面的圆截面尖卵形弹体,采用优化后的椭圆截面弹体与对照弹(圆截面尖卵形弹体)以初速为700~1100 m/s侵彻5层混凝土靶板,分析其过载与弹体所受的应力大小,并提取两种弹形的出靶姿态角与攻角以及速度变化作为判据。结果表明:两种弹形在各工况下的应力均未超过弹体材料的强度极限,弹体未发生弯曲变形。各工况下圆截面尖卵形弹体在Z轴方向上的侵彻过载均大于椭圆截面弹体,其峰值过载约为椭圆截面弹体的1倍。两种弹形在各个初速下,出5层靶的速度均相近。弹体初始速度为700和800 m/s时,两种弹的姿态角、攻角相近,侵彻多层混凝土靶的能力相当。初始速度为900,1000和1100 m/s时,椭圆截面弹体比圆截面弹体的出靶姿态角减小63.59%,攻角减小75.29%。在900~1100 m/s的速度下,弹体质量侵蚀率小于5%,椭圆截面弹体侵彻多层混凝土靶的稳定性优于圆截面弹体,侵彻性能较好。最后通过计算公式验证了仿真结果的准确性。In order to investigate whether the stability of the elliptical cross-section projectile penetrating a multi-layer spaced concrete target is better than that of the traditional sharp ogival-nose projectile with equal cross-section,the optimized elliptical cross-section projectile and the control projectile(sharp ogivalnose projectile)were used to penetrate a five-layer concrete target plate with an initial velocity from 700 m/s to 1100 m/s,and the overloads and the stresses of the projectile were analyzed.Meanwhile,the target attitude angle,angle of attack and the velocity change of two kinds of projectile were extracted as the judgement.The results show that the stresses of two kinds of projectile shapes do not exceed the strength limit of the projectile material under each working condition,and the projectile body does not undergo bending deformation.The penetration overload in the Z-axis direction of the sharp ogival-nose projectile is larger than that of the elliptical projectile under all working conditions,and its peak load is double that of the elliptical projectile.The velocities of two kinds of projectile shapes out of the five-layer target are similar at all initial velocities.When the initial velocities of the projectile are 700 m/s and 800 m/s,the attitude angle and angle of attack of two kinds of projectile are similar,and the ability to penetrate the multilayer concrete target is comparable.At initial velocities of 900 m/s,1000 m/s and 1100 m/s,the elliptical cross-section projectile′s attitude angle out of the target decreases by 63.59%and the angle of attack decreases by 75.29%compared with that of the circular cross-section projectile.At the velocity from 900m/s to 1100m/s,the mass erosion rate of the projectile is less than 5%,and the stability of the elliptical cross-section projectile penetrating the multi-layer concrete target is better than that of the circular cross-section projectile,which verifies the better penetration performance of the elliptical cross-section projectile.And the accu

关 键 词：侵彻弹药 多层混凝土靶 椭圆截面弹体 姿态角 攻角 

分 类 号：O385[理学—流体力学]