柱状炸药水下冲击波连续测量研究

通过自制的压导探针,对柱状装药水下爆炸过程进行连续测量,获得了柱状炸药的爆轰波和水下近场冲击波头的时间历程演化曲线。由此计算出柱状炸药的爆速、水的冲击波速度随时间的变化曲线;进一步由水的冲击雨果尼奥关系式和界面压力、速度连续方程,计算得到了炸药爆压、水下近场冲击波超压变化曲线。结果表明,水下爆炸近场的冲击波速度近似以指数形式衰减,最初阶段衰减很快,随时间推移,衰减越来越慢,最终水中冲击波速度趋于声速。近场冲击波超压的衰减形式与冲击波速度的衰减形式相似。

STUDY ON CONTINUOUS MEASUREMENT OF UNDERWATER SHOCK WAVE OF CYLINDRICAL EXPLOSIVE

By using self-made pressure-conduction probe,the continuous measurement of cylindrical charge underwater explosion was realized,the time history curve of cylindrical explosive detonation wave and near-field shock wave head of underwater were recorded.Detonation velocity of cylindrical explosive and the time history curve of underwater shock wave were obtained.Cylindrical explosive detonation pressure and time history curve of underwater near-field shock wave overpressure were calculated according to the impact Hugoniot relationship of water,continuous equation of interface pressure and velocity.The results showed the speed of the underwater shock wave became attenuated approximately in index form,decreased quickly in the initial stage,reduced more and more slowly after this,and finally tended to the sound velocity in water.The propagation of underwater near-field shock wave overpressure was same with the speed of the underwater shock wave.