基于DYTRAN软件的三维水下爆炸气泡运动研究

应用国际上通用的有限元程序MSC．DYTRAN模拟在重力影响下水下爆炸气泡的脉动规律。通过引入新的流场边界处理技术对不同TNT药量在同一水深、相同TNT药量在不同水深等多种工况下气泡脉动的过程进行了数值计算。分析和总结了球形TNT药包在不同装药量下气泡的半径及脉动的周期，得出了气泡脉动时气泡半径的时间历程曲线，并将计算结果与经验公式进行了对比分析。结果表明：计算结果与经验公式具有较好的一致性，有限元模型正确、有效，结果准确。计算模型、方法及结果对相关的工程研究和计算具有一定参考价值。

Research on the Motion of Three-dimensional Underwater Explosion Bubble with Dytran Software

The underwater explosion bubble motion under the gravitation was simulated and analyzed using MSC. DYTRAN finite element analysis software. The bubble impulse process was numerically calculated by the introduced technique of processing flow field boundary at different TNT charges with same depth and different depths with same TNT charge. The radial displacement histories of the bub?ble were acquired by analyzing and sumarizing the radius and the impulse period of the bubble at the above operating conditions. The computational results of the radius and the impulse period were com- parea with the experimental results ? The compared results show that the former is consistent with the latter, the finite element model is correct and effective. The research has value to correlative theory re?search and engineering calculation.