异形截面侵彻体垂直侵彻半无限金属靶试验研究  

Experimental study on the vertical penetration of novel-section projectiles into a semi-infinite metal target

作　　者：袁焘 赵斌 高光发[1] 杜忠华[1] 王晓东 YUAN Tao;ZHAO Bin;GAO Guangfa;DU Zhonghua;WANG Xiaodong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;No.52 Institute of China North Industry Group,Yantai 264003,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]中国兵器工业第五十二研究所,山东烟台264003

出　　处：《振动与冲击》2020年第22期228-233,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11772160,11472008,11202206);国防科技创新特区项目。

摘　　要：异形弹是一种弹芯截面为非圆截面的杆式穿甲弹。为探究截面形状对杆式穿甲弹侵彻效率的影响,设计了圆形、三角形、正方形、十字形和刻槽形五种截面形状的穿甲弹芯(其质量、截面面积、杆长均相等)。在不同着靶速度条件下,利用25 mm弹道炮开展了异型弹垂直侵彻半无限金属靶的试验。结合靶板的弹坑深度和形貌,分析了不同截面形状弹芯垂直侵彻半无限厚靶板的侵彻规律,并初步讨论了其侵彻机制。结果表明,在试验速度区间(1273~1747 m/s),三角形、正方形、十字形截面侵彻体相对于圆形截面侵彻体的无量纲侵深增加量及增加率均随着靶速度的提高而增大,而刻槽形截面侵彻体相对于圆形截面侵彻体的无量纲侵深增加量无明显变化;由于异形截面弹芯易发生剪切破坏,导致侵彻过程中其弹芯头部面积要小于圆形截面弹芯的,从而降低异形截面侵彻体的侵彻阻力,因此三种异形截面(三角形、正方形和十字形)弹芯相对于圆形截面弹芯均有更高的侵彻效率,其中十字形截面弹芯最高。The novel-section projectile is a rod armour-piercing projectile with non-circular penetrating section.Five armour-piercing projectiles with equal mass,cross-section area and rod length in the shapes of circular,triangle,square,cruciform and grooved circular respectively were designed to explore the influence of cross-section shape on the penetration efficiency of rod armour-piercing projectiles.The experiments of five kinds of projectiles impacting a semi-infinite metal target vertically at different velocities were carried out by using a 25 mm ballistic gun.Integratedly considering the crater depth and target-plane appearance,the penetration of different cross-section shaped projectiles impacting the semi-infinite metal target vertically was analyzed,and the penetration mechanism was preliminarily discussed.The results show that in the test velocity range(1273—1747 m/s),the dimensionless penetration depth increment and increment rate of triangule,square and cruciform cross-section projectiles relatively to circular penetrators increase with the increase of target velocity,but those of grooved circular penetrators are not significant.The shear-failure of novel-section projectiles is easy to occur,leading to make the head area of novel-section projectiles smaller than that of circular section projectiles during the process of penetration,thus,reduce the penetration resistance.As a result,the penetration efficiency of the three novel-section(triangle,square,cruciform cross-section)projectiles is higher than that of circular projectiles,among them the cruciform cross-section projectile has the highest penetration efficiency.

关 键 词：异型截面侵彻体 垂直侵彻 半无限厚靶板 试验研究 

分 类 号：TJ012.4[兵器科学与技术—兵器发射理论与技术]