扁平装药对钢管贯穿破坏的数值模拟  

Simulation of Perforation Effect of Flat Charge on Steel Pipe

作　　者：孙杰[1] 方向[1] 谢立军[1] 郭方[1] 

机构地区：[1]解放军理工大学野战工程学院,南京210007

出　　处：《爆破》2014年第4期5-10,共6页Blasting

基　　金：爆炸科学与技术国家重点实验室开放基金(KFJJ12-18M);中国博士后科学基金(20100471823);江苏省博士后科研基金(1102147c)

摘　　要：为了分析炸药对钢管的贯穿破坏情况,首先进行相关理论计算,并用不同药量和尺寸的TNT进行实爆试验。基于Auto Dyn动力分析软件及Langrange-Euler耦合方法,模拟了外接触爆炸载荷作用下扁平TNT装药对大口径钢管的破坏过程。最后结合试验和模拟结果,剖析了不同TNT装药量和装药尺寸的条件下,钢管发生贯穿破坏特征以及破片形成和速度大小,并与理论计算的破片速度进行比较。结果表明:大药量的炸药作用于钢管上,在接触部位会发生贯穿破坏,产生飞片;贯穿破坏属于剪切破坏,与装药量、装药尺寸等因素有关;产生的破片具有较大动能,其速度与装药高度及装药接触面积有关;只有合理的设置装药高度和装药与管道的接触面积,才能达到较好的贯穿破坏效果。In order to analyze the explosive destruction effect on the steel pipe,the theoretical calculations were conducted. Meanwhile,the TNT explosive with different doses and sizes was applied to the real explosion experiment. Based on the numerical simulation method of coupling AutoDyn and Langrange-Euler,the failure process of large-di-ameter pipe under contact explosion of flat TNT charge was discussed. Finally,combined with TNT test and simula-tion results,the main features of pipe damage were discussed,including the fragment formation process and the frag-ment velocity,which was also compared with the fragments velocity through theoretical calculations with different loading dose size and charge condition. Results showed the steel pipe penetration and fragment produced near the contact area under big charge. Perforation was shear failure,which was related with loading dose and charge size. The fragment momentum was big enough and the speed was affected by charge height and contact area. By reasonable charge size,better destruction effect could be obtained.

关 键 词：扁平装药 接触爆炸 贯穿 数值模拟 破片 

分 类 号：O383[理学—流体力学]