利用脉冲Ｘ光实验，获得了一组膛内火药床在底部点火条件下撞击弹底及在弹底处形成堆积与挤压状况的照片，并测出了药床前沿药粒撞击弹底时的运动速度．进一步的动态模拟实验，取得了与膛内实际环境相近的药粒撞击和挤压实验结果．通过对实验结果的定性和定量分析，给出了火药颗粒在承受撞击和挤压两种不同力学状态下所引起的火药破碎及破碎程度，从而为进一步研究火药由破碎诱发膛炸提供了重要的实验依据． By using pulsed X-ray experiments, a series of pictures of the gunpowder bed in the bore firing at the bottom and the pile-up and squeeze at the bottom of the bomb were obtained. Movement speed. Further dynamic simulation experiments, obtained with the actual environment similar to the particle impact and squeeze the experimental results. Through the qualitative and quantitative analysis of the experimental results, the degree of broken and crushing of gunpowder particles caused by two different mechanical states of impacting and extruding are given, which provides important information for further research on the powder explosives induced by crushing. Experimental basis.