一种预估无限水域爆炸气泡脉动周期方法

A Method of Estimating the Bubble Oscillation Period of Underwater Explosion in Indefinite Water

为真实评估水中爆炸气泡能、准确计算气泡脉动周期,根据水中爆炸已有研究成果和相似理论提出了水中爆炸气泡脉动周期的预估方法。通过3次TNT海中爆炸标定试验,得到TNT炸药气泡脉动周期预估公式,用该公式算得水中TNT爆炸的气泡脉动周期值与实测值的误差为小于1.34%;通过3次Al/RDX/TNT海中爆炸标定试验,得到Al/RDX/TNT炸药气泡脉动周期预估公式,用该公式算得水中Al/RDX/TNT炸药的气泡脉动周期值与实测值的误差为小于1.45%。气泡脉动周期与炸药当量1/3次方成正比,与大气压力折算深度及爆炸深度之和的5/6次方成反比;气泡脉动周期受炸药种类严重影响。炸药的化学特征与脉动周期计算公式具有强关联。采用海中标定的方法,能够精确预估水中爆炸气泡脉动周期,预估值与实测值的误差为小于2.54%,适用于炸药水中爆炸的气泡脉动周期估算。

For the real evaluation of the bubble energy and the accurate calculation of bubble oscillation period of underwater explosion,according to the existing research payoffs of underwater explosion and the similarity law,a method of accurately estimating the bubble oscillation period of underwater explosion was presented. The formula estimating the bubble oscillation period of TNT explosive was obtained via three calibration experiments of TNT explosion in sea,and the error of calculated and the experimental one is smaller than-1. 34%. The formula estimating the bubble oscillation period of Al / RDX / TNTT explosive was obtained via three calibration experiments of Al / RDX / TNTT explosion in sea,and the error of calculated and the experimental one is smaller than 1. 45%. The bubble oscillation period is proportional to the1 /3 powers of explosive equivalent and is inversely proportional to the 5 /6 powers of summation of the converted water depth of atmospheric pressure and water depth over explosion. The bubble oscillation period is badly affected by the types of explosives. The chemical characteristics of explosive and formulas used to calculate the bubble oscillation period have strong correlation. Use of calibration method in sea can accurately estimate the bubble oscillation period of underwater explosion. The error of the estimated value and the experimented one is smaller than 2. 54%. The method is suitable for estimation of the bubble oscillation period value of underwater explosion of explosive.