水下爆炸冲击波的近场特性  

Short-range characters of underwater blast waves

作　　者：师华强[1] 宗智[1,2] 贾敬蓓[1] 

机构地区：[1]大连理工大学船舶与海洋工程学院,辽宁大连116024 [2]工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《爆炸与冲击》2009年第2期125-130,共6页Explosion and Shock Waves

摘　　要：通过求解球形一维流体动力学方程,模拟了水下爆炸冲击波的产生和传播过程。在数值模拟中,对TNT炸药采用标准的JWL状态方程,对水采用Two-phase状态方程。应用Level Set方法确定爆炸产物和水的交界面的位置。对裸药球在无限水域爆炸进行了数值计算,考察了网格大小对结果收敛性的影响,分析了水下爆炸冲击波压力和比冲量的近场特性。最后通过数值拟合得到了冲击波压力峰值、比冲量和时间衰减常数的近似回归公式。Blast wave produced by an outer-sphere charge exploding in water of infinite depth was numerically simulated by solving the one-dimensional hydrodynamic equations for an inviscid and non-heat-conducting flow. In the simulation calculation, a Jones-Wilkins-Lee equation of state for TNT and a two-phase equation of state for water were adopted. The interface between the explosion products and water was determined by using the level set method. Firstly, grid-size effects on the convergence of the calculated results were explored. And the characters of pressure and impulse of underwater blast wave in the short range were investigated in detail. Finally, the approximate formulas for the peak pressure, specific impulse and attenuation constant were obtained by curve fitting.

关 键 词：爆炸力学 近场特性 数值计算 冲击波 水下爆炸 

分 类 号：O382.1[理学—流体力学]