TNT空中爆炸冲击波的工程和数值计算  

Empirical Formula and Numerical Simulation of TNT Explosion Shock Wave in Free Air

作　　者：辛春亮[1] 王俊林[1] 余道建[1] 李通[2] 宋师军[1] Xin Chun-liang;Wang Jun-lin;Yu Dao-jian;Li Tong;Song Shi-jun(Beijing Institute of Space Long March Vehicle,Beijing,100076;China Academy of Launch Vehicle Technology,Beijing,100076)

机构地区：[1]北京航天长征飞行器研究所,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《导弹与航天运载技术》2018年第3期98-102,共5页Missiles and Space Vehicles

摘　　要：针对TNT空气中爆炸冲击波压力,建立了空气自由场爆炸冲击波工程计算模型,并采用AUTODYN和LS-DYNA软件中的一维计算模型对TNT空气自由场爆炸冲击波压力衰减过程进行了数值模拟研究。为了捕捉峰值,数值计算模型中采用细密的网格和很小的人工粘性系数。数值模拟结果与工程计算结果大致吻合,但AUTODYN计算耗时远高于LS-DYNA。Empirical formula of blast waves in free air is presented in the paper. Calculation and numerical simulation of TNT explosion in air are analyzed using these empirical formula, AUTODYN and LS-DYNA software respectively. Fine meshes and small hourglass coefficient are used in one-dimensional simulation model to capture peak pressure of shock wave. Simulated pressure profiles agree approximately with these calculated by empirical formula. The computational CPU time by AUTODYN is much longer than that by LS-DYNA.

关 键 词：冲击波 工程计算模型 数值模拟 TNT 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O383[理学—流体力学]