摘要25mm无引信撞击起爆榴弹是一类特殊的榴弹，因为不使用引信，单纯依靠高速撞击使燃烧剂上的应力达到临界起爆应力，使燃烧剂产生爆轰并传递至猛炸药，最终使猛炸药起爆完成爆炸过程。60970

对于25mm无引信撞击起爆榴弹，由于是单纯依靠高速撞击使起爆弹丸，因此存在着一对天生的矛盾：既要保证在勤务处理时在弹丸不慎跌落的情况下不会起爆，也要保证在以不同速度（即在弹丸飞行过程中的不同时刻）、不同角度撞击目标目标能够可靠起爆。

本文首先讨论了榴弹的外形尺寸和结构特点，通过计算确定出较为合适的25mm榴弹的各部分零件的尺寸，并且对弹丸各部分零件进行强度校核。随后利用LD-DYNA软件建立弹丸和靶板模型，然后对弹丸和靶板模型进行网格划分。之后利用已建立的模型对弹丸在勤务处理时不同角度的跌落过程进行仿真，根据结果讨论弹丸在勤务处理的安全性；对弹丸以不同速度、不同角度撞击目标过程进行仿真，根据结果讨论弹丸弹丸撞击目标的可靠性。

毕业论文关键词：撞击起爆  弹丸结构  LS-DYNA仿真  勤务处理安全性  撞击目标可靠性

毕业设计说明书（论文）外文摘要

Title  The explosive projectile charge simulation research of impact initiation technology

25mm no fuze impact detonating grenade is a special kind of grenade, because they do not use fuses, relying solely on high-speed crash on the combustion agent render it  reaches critical initiation stress, then the combustion agent generate and deliver explosive detonation to the high explosive, Eventually make high explosive detonation and complete the explosion process.

  25mm no fuze impact detonating grenade,because it is simply relying on high-speed crash that detonating projectile, so there is a pair of innate contradiction: it is necessary to ensure that in the case of accidentally dropped in the service processing , the projectile will not detonate, but also to ensure that the at different speeds (that is , during the different phases of the flight of the projectile) and different angles, striking the target goal can be reliably detonate.

   This paper first discusses the dimensions and structural characteristics of the grenade, determined by calculating a more appropriate size of the various parts of the 25mm grenade, and check the strength of the various parts of the projectile. Then using the LD-DYNA software to establish the plate model of the projectile and target, and then mesh the projectile and target plate model. And then use the model established to simulate the process that the projectile drop in different angles in the service processing, based on the results, discusse the security of projectile in the service processing; And simulate the process that the projectile strik the target at different speeds and different angles, according to the results, discusse the reliability of the projectile when striking the target.

Key words: impact detonation  projectile structure LS-DYNA simulation  Security of service processing  reliability when striking the target

1 绪论 1

1.1 弹药爆炸序列中直列爆炸元件火药装药概况 1

1.2 榴弹25mm系列发展过程 1

1.3 小口径榴弹的研究意义 3

1.4 本文研究内容 3

2 25mm无引信榴弹外形设计 5

2.1 弹丸外形尺寸计算 5

2.2 材料选取 9

2.3 强度校核