水下爆炸中水面效应以及药包形状对冲击波的影响

Effect of water surface and shape of charge on shock wave in underwater explosion

为研究水下爆炸中水面效应和药包形状对冲击波的影响,通过理论分析和浅水实验研究水面的截断效应,分析水面对冲击波的影响,得到关于截断距离与药包位置之间的关系。通过数值模拟和经验公式的对比,验证经验公式的合理性以及适用场景。实验结果表明:在近场条件下,柱形药包压力峰值相较于经验公式较低,需要对经验公式乘以一个在0.65~0.97之间的修正系数;远场条件下,柱形药包与球形药包接近的较好,可以用球形药包的经验公式进行近似。

In order to study the effect of water surface and shape of the charge on the shock wave in underwater explosion,the theoretical analysis and shallow water experiment were conducted to study the truncation effect of the water surface.The influence of water surface on shock wave was analyzed and the relationship between the cutoff distance and the position of the charge was obtained.Through the comparison of numerical simulation and empirical formula,the rationality of the empirical formula and the applicable scenarios were verified.The experimental results show that in the near-field conditions,the peak pressure of the cylindrical charge is lower than that which got from the empirical formula,and needs to be multiplied by a correction coefficient between 0.65 and 0.97.In the far field conditions,the closeness of the cylindrical charge and the spherical charge is better,which can be approximated by empirical formulas of spherical charge.