大当量TNT装药爆轰的远场数值模拟及超压预测  

Simulation of Thousands Kilograms of TNT Explosion Shock Wave in Air at Distance Far Away and Forecast of the Peak Overpressure

作　　者：汪维[1] 张舵[1] 卢芳云[1] 唐俭 荆松吉[1] 

机构地区：[1]国防科学技术大学理学院,长沙410073 [2]解放军空军第八研究所,北京100070

出　　处：《弹箭与制导学报》2010年第1期127-130,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：利用AUTODYN-2D软件对1000kg TNT装药在空气中爆炸的情况,分别进行无限空气中一维数值模拟与有一定地面爆高高度二维数值模拟,结果表明:超压峰值的计算结果与经验公式的计算结果具有较好的一致性,在一定的范围内数值模拟很好的模拟了爆炸冲击波传播过程。在此基础上分析了爆高高度的影响,研究表明:在一定爆高高度情况下较触地爆炸,近场(水平距离S<10m)时超压峰值在随着h的增大而减小;远场(S>30m)冲击波峰值到达时间较晚,在炸高与水平距离之比h/S=0.1时超压峰值达到最大值。By using software of AUTODYN-2D, a thousand kilograms of TNT exploding in air is simulated, and the computed results are compared with experience formula, good agreements are got. The result implies that the shock wave propagation is simulated well in certain range. Base on the research, the influence of the explosion height is analyzed. The peak overpressure of a certain height of explosion arrives later than on the ground, the value decreases with the increasing of explosion height when horizon distance S below 10 meters and reaches highest when the ratio of explosion height verse S equal 0. lin far away （S〉30m）. It can be used to forecast of shock wave peak overpressure of large amount of TNT in air at distance far away from the explosion center and will be useful for reference in evaluating the damage effect on target.

关 键 词：空中爆炸 冲击波 超压峰值 数值模拟 爆高高度 

分 类 号：O382[理学—流体力学]