中心引爆破片战斗部产生的近区空气爆炸波的计算

本文提出一种计算中心起爆有限装药尺寸破片战斗部产生的近区空气爆炸波超压的近似方法。战斗部壳体碎片除受爆轰产物的推力及空气反压外,还考虑了碎片形状等因素引起的形阻修正。适当选取形阻修正系数及修正项引入时刻,计算数据与数十公斤装药战斗部近区实验结果十分接近。本文结果表明,爆破战斗部近区空气爆炸波的计算不能采用强爆炸波理论,应当考虑飞片驱动冲击波的模型。

CALCULATION OF THE AIR BLAST WAVE NEAR A FRAGMENTATION WARHEAD INITIATED AT ITS CENTER

An approximation method is proposed in this paper to calculate the overpressure of the air blast wave near a framentation warhead with finite size and initiated at its center. For the fragments of the warhead case driven by detonation products and damped by the raction of the air shock wave. an additional factor known as shape drag should be taken into account. By properly determining the coefficient of the shape drag and its beginning time of action the calculated results could agree well with the experimental data. The conclusion of this paper is that the air blast wave near the warhead should be calculated with the fragment-driven shock wave model rather than the ordinary blast wave theory.