高祥涛;陈程;
GAO Xiang-tao;CHEN Cheng;Guizhou Public Security Bureau;School of Mechanics & Civil Engineering,China University of Mining & Technology(Beijing);

• 1:贵州省公安厅治安总队
• 2:中国矿业大学(北京)力学与建筑工程学院

摘要(Abstract)：

为了研究切缝药包定向断裂效应,采用纹影实验方法研究了无限空气自由场中切缝药包爆炸波传播规律,采用动态焦散线实验方法研究了切缝药包在固体介质中产生定向裂纹的过程,并用AUTODYN数值分析对实验结果进行了验证和补充。研究结果表明:切缝药包特殊结构使得爆炸波和爆生气体优先沿切缝方向定向释放,是形成定向裂纹的关键;在爆轰波未传播至切缝管壁阶段,爆轰产物压力从爆轰波阵面向炮孔中心呈先增大后减小的梯度分布规律,同时第一次压力峰值随距炮孔中心距离的增大而增大;合理的空气不耦合装药系数决定着切缝药包产生定向裂纹的效果。
In order to study the directional fracture effect of split-tube charge holder,the schlieren method was used to study the propagation law of blast wave in the split-tube charge holder in an infinite air free field,the dynamic caustics experiment method was used to study the process of directional cracking in the solid medium.The experimental results were verified and supplemented by AUTODYN numerical analysis.The results show that the special structure of the split-tube charge holder makes the blast wave and the explosive gas preferentially released along the slitting direction,which is the key to the formation of directional cracks.When the detonation wave is not propagated to slit pipe wall,the pressure of the detonation product increases from the detonation wave array toward the center of the blast hole and then decreases.At the same time,the first pressure peak increases with the distance from the center of the blast hole.A reasonable air decoupling charge coefficient determines the effect of directional cracks produced by the split-tube charge holder.

关键词(KeyWords)： 切缝药包;定向断裂;爆炸波;不耦合装药
split-tube charge holder;directional fracture;blast wave;decouple charge

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 高祥涛;陈程;
GAO Xiang-tao;CHEN Cheng;Guizhou Public Security Bureau;School of Mechanics & Civil Engineering,China University of Mining & Technology(Beijing);

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