浅层水中爆炸直达波压力峰值计算方法探讨

探讨了浅层水中爆炸直达波压力峰值的计算方法。通过理论研讨，提出了浅层水中直达波压力峰值相对无限场中下降的临界时刻。临界时刻之后直达波压力峰值降低的程度用下降系数描述，应用相似理论推导出了该系数随试验设置参数变化的公式模型，用该系数修正库尔压力公式，得出了浅层水中爆炸直达波压力峰值的计算公式。对试验数据进行回归，得到了试验条件下公式模型中各参数的取值范围。计算值与实测值的比较表明，该公式具有一定的精度。

Discussion on Calculation Method of Peak Pressure Subjected to Shallow-layer Water Explosion

The purpose of this paper is to examine the calculation method of direct shock wave' peak pressure. By theoretical researches, with a critical moment is presented at which the peak pressures of direct waves in shallow layer water begin to lower in comparison that in infinite water space. The dropping degree can be described with drop coefficient. Using scaling theory, the formula model that the coefficient varies with setting parameters of the tests is deduced. Multiplying this coefficient by Cole's pressure formula, the formula to calculate peak pressures of direct shock waves in shallow layer water is obtained. By regression of the data, the ranges of values of the parameters of the formula are obtained. The comparison of the tested data and calculated data indicates that the formula is precise.