锥形端部弹体在岩石(混凝土)介质层中侵彻实用计算方法  

The method of calculation for penetrationof conical-nosed projectile in rock (concrete) layers

作　　者：陈士林[1] 王明洋[1] 潘越峰[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《爆炸与冲击》2004年第1期7-15,共9页Explosion and Shock Waves

基　　金：国家安全重大基础研究基金项目 (5 1 30 9 1 7) ;国家自然科学基金项目 (5 0 1 790 38)

摘　　要：采用刚塑性不可压缩的介质模型 ,用极限分析理论的上限方法 ,通过建立动力学许可速度场得到介质对弹体侵彻的静阻力分量 ,通过破碎介质动量守恒条件得到弹体侵彻的动阻力分量 ,在模型中还考虑了介质的尺度关系和弹体的弹头形状两种影响因素。侵彻过程中的速度、加速度、阻力和经历时间通过弹体的运动方程增量计算得到。Rigid perfectly plastic model in incompressible medium is used in this paper. By setting kinematically admissible velocity field, static resistance of medium to projectile is analyzed with upper bound theorem of limit analysis. Kinematical resistance of medium to projectile is considered in terms of the law of conservation of momentum. Dimensional effect of structure and the shape of projectile are also considered. Through adopting incremental calculation about the equation of projectile’s motion, the velocity,acceleration,resistance and time in the process of penetration are obtained. By comparing the result of calculation with experimental formulas, the reliability and practicality of the method are proved.

关 键 词：固体力学 刚塑性极限分析 侵彻计算 锥形弹 有限厚度介质 侵彻深度 冲击速度 

分 类 号：O385[理学—流体力学]