不同长径比药柱的空气冲击波参数特性研究

摘要

为了研究爆破实践中常采用的不同长径比的柱状药包空气冲击波参数特性.根据动力模型实验的相似关系,设计制作了6组不同长径比的RDX(黑索今)药包,并完成了爆炸冲击波参数的测试实验.实验结果表明:药包长径比对冲击波性质有一定影响,冲击波最大压力上升时间随长径比的增大总体上表现为增大趋势；冲击波峰值超压随长径比的增大表现为减小趋势；冲击波正压和负压作用时间随长径比的增大基本保持不变.此研究的结果可作为进一步了解冲击波的参数特性和防爆安全的参考.%To study the shock wave structure of column charge in blasting engineering with different length-diameter ratio,according to the similar relationship of dynamic model test,six groups of different length-diameter ratio RDX column charges were designed. The explosion shock wave parameters testing were also performed. The results show that the length-diameter ratio played role in the shock wave structure. The time up to peak pressure increases and the peak pressure decreases with the length-diameter ratio increasing. While the action duration of shock wave pressure and negative pressure remains unchanged with the length-diameter ratio increasing.