【作者】 蔡吉生；

【导师】 沈瑞琪；

【作者基本信息】 南京理工大学 ， 军事化学与烟火技术， 2006， 硕士

【摘要】 本文应用Hopkinson压杆实验装置，对压装B／BaCrO₁硼系延期药的延期装置进行了高加速度过载加载实验研究，分析了高加速度过载加载时延期药的抛射机理，提出两种提高延期装置抗过载加速度能力的加固方法。研究的具体内容如下： 应用Hopkinson压杆实验装置对延期装置进行高加速度过载加载实验。实验结果表明，在高加速度过载加载条件下从延期装置端口抛射出部分延期药颗粒，且延期药抛射量随过载加速度的增大而增加。根据实验现象及实验数据分析了延期药的抛射机理。 本文提出通过改变延期装置壳体尺寸及增加外部缓冲热垫片两种方法，对高加速度过载加载下的延期装置进行加固。实验结果表明：增加管壳直径能够明显减小过载加速度对延期药燃速造成的影响，而且延期药抛射量也明显减小；改变管壳长度对提高延期装置抗过载能力的作用很小；在延期装置两端加垫纸垫可以明显减小延期药的抛射量，而且其加固效果优于在延期装置一端加垫纸垫。 应用ANSYS／LS-DYNA软件仿真模拟了管壳尺寸改变前后及加垫纸垫前后延期装置高加速度过载加载过程。仿真模拟结果表明高加速度过载加载时延期药有抛射现象，管壳加固和纸垫加固模拟结果与实验结果基本一致。更多还原

【Abstract】 A Hopkinson pressure bar technique was used to test the burning performance of boron type delay charge pressed into the delay unit under overload with a high acceleration in this dissertation, in which the theoretical invalidation of the delay unit was analyzed, and two methods were used to improve the antioverload performance. The main works and achievements are presented as follows:The delay unit was tested under overload with a high acceleration. The results indicated that a portion of the delay charge was projected from the end of the delay unit during the course of the experiment, and the projecting quantity increased with the acceleration. The projecting mechanism was analyzed on the basis of the phenomena and data.Two methods, namely changing the dimension of the delay unit and adding exterior buffer spacers, were utilized to reinforce the delay unit under overload with a high acceleration. Increasing the diameter of the shell tube decreased remarkably the effect of high acceleration on burning rate of the delay charge and the projecting quantity. Change in the length of the shell tube had very little effect on the antioverload performance. Adding paper spacers at the ends of the delay unit decreased remarkably the projecting quantity and had better reinforcing effect than adding a paper spacer at only one end of it.Before/after changing the dimension of the delay unit or adding exterior buffer spacers, the burning process of boron type delay charge pressed into the delay unit under overload with a high acceleration was simulated with ANSYS/LS-DYNA. The simulation indicated that the delay charge was projected under overload with a high acceleration, and accorded with the experimental data.更多还原