弹体攻角侵彻混凝土靶的工程计算模型  

Engineering calculation model for a projectile's penetrating into a concrete target with attack angle

作　　者：薛建锋[1] 沈培辉[1] 王晓鸣[1] 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,南京210094

出　　处：《振动与冲击》2017年第13期238-244,共7页Journal of Vibration and Shock

基　　金：国家973计划(61314302)

摘　　要：为了研究倾角、攻角等参数的变化对侵彻过程的影响,基于表面层裂机理和刚体运动学方程,建立了用于分析弹体斜侵彻混凝土靶的工程计算模型。利用该计算模型得到弹体侵彻过程中的受力和过载的变化情况,获得侵彻弹道随倾角、攻角等参数变化的规律:负攻角对斜侵彻的弹道偏转具有一定的抑制作用,正攻角对斜侵彻的弹道偏转具有放大作用。计算结果与试验数据吻合较好,表明该计算模型能准确地预估弹体斜侵彻混凝土的动力学过程。该方法可以为弹体对混凝土靶的斜侵彻弹道分析,尤其开坑、初始偏转预估提供一种实用手段。; In order to study influences of changes of oblique angle and attack one on a projectile ^ s penetrating process, the engineering calculation model was established based on the surface splitting mechanism and rigid kinematic equations. Using this calculation model, changes of forces and overloads of the projectile ^ s penetrating process were observed, and the varying laws of the penetrating ballistic trajectory with the variation of oblique angle and attack angle were obtained. It was shown that a negative attack angle has a certain ability to reduce ballistic deflection of oblique penetration,but a positive attack angle has an ability to enlarge this deflection ; the calculated results agree well with the test data, so the calculation model can correctly predict the dynamic process of the projectile ^ s penetrating into a concrete target; this method can provide a applicable means for ballistic trajectory analysis of oblique penetration, especially, for those in cases of opening a pit and initial deflection prediction.

关 键 词：侵彻力学 攻角 层裂机理 弹道轨迹 过载 

分 类 号：TJ012.4[兵器科学与技术—兵器发射理论与技术]