摘要本文以12.7毫米口径狙击步枪弹和制式枪为研究对象,调研大口径狙击步枪弹国内外的发展状况,并在现有的54式12.7毫米穿甲燃烧弹的基础上,进行结构上的优化设计,以满足给定的基本战术技术指标。然后将设计的弹丸进行强度校核与匹配分析计算,最后进行弹道计算,并按要求绘制二维工程图纸。本课题核心是弹丸结构的优化设计,采用了当今狙击步枪弹领域少见的全铜加铝帽的结构,尤其在弹内设计了一圆柱孔形式的空腔。该设计缩短了弹丸阻心—质心距,减小了转动惯量比B/A的值,提高了弹丸的飞行稳定性,进而提高了射击精度。60594
毕业论文关键词 狙击步枪弹 发展状况 设计 匹配 计算 射击精度
毕业设计说明书(论文)外文摘要
Title Matching Technology Research of The Large Caliber Machine Gun Bullets
Abstract Based on the 12.7 mm caliber sniper rifle cartridge and standard gun which as the research object, the article is written for researching large caliber sniper rifle cartridge development status at home and abroad, and on the basis of 12.7 mm armor—piercing incendiary bullets, doing the structural optimization design, in order to satisfy the given basic tactical technique index. Then checking the strength of the finished bullet and making matching analysis and calculation, finally the ballistic calculation, and drawing the 2 D engineering drawings according to the requirement. The core of this topic is projectile structure optimization design, it used the rare full copper and aluminum cap in the field of sniper rifle bullets, supplemented by a cylinder cavity in the whole structure. The design shortens the distance between the center of resistance and the heart of mass in the projectile, reduces the inertia ratio—B/A, and improves the flight stability of projectiles, the firing accuracy can be improved.
Keywords sniper rifle bullets development status design match calculation firing accuracy
1 引言··1
1.1狙击弹的研究背景及意义··1
1.1.1研究背景1
1.1.2新型弹的设计及研究意义·1
1.2狙击弹国内外发展状况·3
1.2.1狙击弹的发展历史3
1.2.2国外大口径狙击步枪弹介绍··5
1.2.3国内12.7mm口径狙击步枪弹·10
1.3课题任务要求12
2 大口径狙击步枪弹结构设计13
2.1设计思路·13
2.1.1狙击弹的战术技术要求··13
2.1.2设计方向选择·14
2.2 结构初选··15
3弹丸尺寸设计及计算·21
3.1弹丸整体质量确定·21
3.2弹丸外形尺寸设计·22
3.3弹丸内部结构设计·26
4匹配性计算·38
4.1弹丸强度计算·38
4.1.1导转侧力计算·38
4.1.2弹丸膛内性能38
4.1.3弹丸飞行稳定性计算·40
5弹道计算42
5.1内弹道计算42
5.2外弹道计算45
结论··49
致谢··50
参考文献·51
1 引言
1.1 狙击弹的研究背景及意义
1.1.1 研究背景
二十一世纪是信息化、数字化时代。狙击步枪作为单兵作战领域里的一项伟大发明,其在特殊作战任务中有着不可替代的作用,它的发展仍然紧密地随着时间的脚步前行。为满足战争的需要,狙击步枪经历了口径的一系列改变,从小口径到大口径,逐渐形成了以7.62、12.7毫米等口径为流行,多种口径百花齐放的发展新时期。几种远程狙击步枪弹