水下爆炸冲击波的数值模拟与试验研究  

Numerical Simulation and Experimental Study of Underwater Explosion Shock Wave

作　　者：钟冬望[1,2] 黄小武[1,3] 殷秀红[1] 李琳娜[1,2] 何理[2] 

机构地区：[1]武汉科技大学理学院,武汉430065 [2]中铁港航-武汉科技大学爆破技术研究中心,武汉430065 [3]武汉爆破有限公司,武汉430023

出　　处：《爆破》2015年第4期17-20,共4页Blasting

基　　金：国家自然科学基金资助项目(51174147,51574184);湖北省科技支撑计划项目(2014BEC058)

摘　　要：采用ANSYS/LS-DYNA有限元分析软件,对小当量TNT炸药在无限水域内爆炸进行数值模拟,并将数值计算结果与实验室内实测数据以及传统的经验公式计算结果进行对比。分析发现:用传统的经验公式计算小当量TNT炸药在水下爆炸时的爆炸冲击波压力峰值,与实测值相比存在较大误差;运用有限元显式动力分析方法计算得到的水下爆炸冲击波压力峰值与实测值相吻合,并且水下爆炸冲击波波形相近。对数值计算值进行拟合得到水下爆炸冲击波压力峰值的计算公式,可以对同等条件下的水下爆炸试验进行估算。Performed numerical simulations for small equivalent TNT explosive blasted in infinite waters by finite element software ANSYS/LS-DYNA, and then compared the numerical calculation results with the data measured in laboratory as well as the results calculated by traditional empirical formula. According to analysis, we found the error is large when calculating the peak pressures of underwater explosive shock wave caused by small equivalent TNT ex- plosive by traditional empirical formula compared with measured data. The peak pressures of underwater explosive shock wave calculated by the explicit dynamic finite element analysis method coincide with measured data, and the underwater explosive shock waves are approximated. Fitting calculation formula of the peak of underwater explosive shock wave pressure and J t can be used to estimate the underwater explosion experiment on the same condition.

关 键 词：爆炸动力学 水下爆炸 数值模拟 

分 类 号：O389[理学—流体力学]