炸药爆炸变形和首次破碎的研究

 利用纹影技术研究了炸药爆轰后驱动物质的变形过程。为了便于观察，待测物质选取为变形比较大的介质水。实验观察表明，在炸药爆轰作用下，筒状水的膨胀首先由雷管起爆端开始，形成了倾斜状、波浪形的界面。结果表明：阵面的波动破裂均从外界面开始，界面的不稳定性可能是导致其失稳并破碎的主要原因。实验还观察到炸药爆轰后不同延迟时间的物体从大块变成小块的发展过程。研究中克服了炸药爆轰产物发光对图像的影响，以及爆炸振动对光路的影响。研制了一种简易的触发探针，解决了外光源和炸药爆轰的同步问题。

Studies on Explosion Distortion and First Breakdown under Explosive Detonation

The distortion process of the charge envelope and first breakdown is studied in order to understand the formation process of explosion breakdown.The distortion process driven by explosive detonation is observed by means of schlieren technique.A large distortion medium-water is chosen as the sample for observation.The experimental observations show that the expansion of water in cylinder starts from the end of initiation for initiator,then forms a slant and wave interface.The results indicate that the breakdown of the wave interface starts with an outside. It is an important reason that the instability of interface may make it to destabilize and to break.It is observed experimentally that the matter dimension becomes smaller and smaller at different delay time after the explosive detonated.The influences of explosive detonation light on figure and of explosion vibration on light path were overcomed.A simple trigger was developed,and the problem of synchronization of outside light source with explosive initiation was resolved.