Parametric study on mass loss of penetrators  

作　　者：Li-Ling He Xiao-Wei Chen Xiang He 

机构地区：[1]Department of Modem Mechanics, University of Science and Technology of China, 230027 Hefei, China [2]Institute of Structural Mechanics, China Academy of Engineering Physics, P.O. Box 919-401, 621900 Mianyang, China [3]Luoyang Institute of Hydraulic Engineering Technology 471023 Luoyang, China

出　　处：《Acta Mechanica Sinica》2010年第4期585-597,共13页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (10672152);the Science Foundation of China Academy of Engineering Physics (2009A0201009);the Innovation Fund of the Institute of Structural Mechanics,CAEP (09CXJ05)

摘　　要：Earth penetration weapon （EPW） is applicable for attacking underground targets protected by reinforced concrete and rocks. With increasing impact velocity, the mass loss/abrasion of penetrator increases, which significandy decreases the penetration efficiency due to the change of nose shape. The abrasion may induce instability of the penetrator, and lead to failure of its structure. A common disadvantage, i.e. dependence on corresponding experimen- tal results, exists in all the available formulae, which limits their ranges of application in estimating the mass loss of penetrator. In this paper, we conduct a parametric study on the mass loss of penetrator, and indicate that the mass loss of penetrator can be determined by seven variables, i.e., the initial impact velocity, initial nose shape, melting heat, shank diameter of projectile and density and strength of target as well as the aggregate hardness of target. Further discussion on factors dominant in the mass abrasion of penetrator are given, which may be helpful for optimizing the target or the projectile for defensive or offensive objectives, respectively.Earth penetration weapon （EPW） is applicable for attacking underground targets protected by reinforced concrete and rocks. With increasing impact velocity, the mass loss/abrasion of penetrator increases, which significandy decreases the penetration efficiency due to the change of nose shape. The abrasion may induce instability of the penetrator, and lead to failure of its structure. A common disadvantage, i.e. dependence on corresponding experimen- tal results, exists in all the available formulae, which limits their ranges of application in estimating the mass loss of penetrator. In this paper, we conduct a parametric study on the mass loss of penetrator, and indicate that the mass loss of penetrator can be determined by seven variables, i.e., the initial impact velocity, initial nose shape, melting heat, shank diameter of projectile and density and strength of target as well as the aggregate hardness of target. Further discussion on factors dominant in the mass abrasion of penetrator are given, which may be helpful for optimizing the target or the projectile for defensive or offensive objectives, respectively.

关 键 词：Penetrator Mass loss Depth of penetration Parametric study 

分 类 号：TJ413.2[兵器科学与技术—火炮、自动武器与弹药工程] TB114.2[理学—运筹学与控制论]