内膛损伤枪管对内弹道性能和弹头出膛状态的影响研究

doi:10.3969/j.issn.1000-1093.2019.04.006

兵工学报 ›› 2019, Vol. 40 ›› Issue (4): 718-727.doi: 10.3969/j.issn.1000-1093.2019.04.006

内膛损伤枪管对内弹道性能和弹头出膛状态的影响研究

沈超¹，周克栋¹，陆野¹，乔自平²

(1.南京理工大学机械工程学院，江苏南京 210094； 2. 中国兵器工业第208研究所，北京 102202)

收稿日期:2018-07-04 修回日期:2018-07-04 上线日期:2019-06-10
通讯作者: 周克栋（1964—），男，教授，博士生导师 E-mail:zkd81151@126.com
作者简介:沈超（1992—），男，博士研究生。E-mail: shenchao@njust.edu.cn
基金资助:
国家自然科学基金项目（11802138）；中国博士后科学基金项目（2018T110503）；中央高校基本科研业务费专项资金项目（30918011302）

Research on the Influence of Damaged Barrel on Interior Ballistic Performances and Muzzle-leaving State of Bullet

SHEN Chao¹, ZHOU Kedong¹, LU Ye¹, QIAO Ziping²

(1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; 2.No.208 Institute of China Ordnance Industry, Beijing 102202, China)

Received:2018-07-04 Revised:2018-07-04 Online:2019-06-10

摘要/Abstract

摘要： 为研究大口径机枪内弹道性能和弹头出膛状态受内膛损伤的影响规律，探究内膛损伤导致枪管寿终的关键因素，对某12.7 mm重机枪进行了系统的寿命试验。分析获得了该枪枪管内膛损伤的主要形式及其随射弹数增加在枪管轴向的分布及演化规律，在此基础上建立了精确的不同寿命阶段内膛损伤枪管的弹-枪热力耦合有限元模型。采用Fortran子程序实现了内弹道过程与显式有限元方法的迭代数值求解，获得了12.7 mm弹头内弹道性能及出膛状态等随内膛损伤发展的变化规律，将数值模拟结果与寿命试验数据进行对比验证了弹-枪耦合模型的准确性。仿真结果表明:弹头出膛时的扰动量、转速的下降量以及表面形貌的改变量等随枪管射弹数增加而增加，在身管寿命后期表现尤为明显；弹头出膛状态的改变是导致该枪枪管寿终的主要原因。研究结果对进一步分析内膛损伤引起的弹头外弹道性能退化行为，实现从内到外完整地分析枪管寿终机理具有重要意义。

关键词: 枪管寿命试验, 内膛损伤, 内弹道性能, 出膛状态, 有限元方法

Abstract: The influence of bore damage on interior ballistic performance and muzzle-leaving state of bullet is studied, and the mechanism of how bore damage leads to the end of barrel's life is explored. The accurate thermo-mechanical coupling finite element analysis (FEA) models of barrels with bore damage at different life periods are established based on the distribution and evolution rule of bore damage obtained through systematic life tests. The changing rules of interior ballistics performances and muzzle-leaving states of 12.7 mm bullet with the evelopment in bore damage are obtained through numerical simulation which combines the interior ballistics process and the explicit finite element method through Fortran subroutines. The coupling model of bullet and gun barrel is proved to be effective by comparing the calculated results of interior ballistic parameters with experimental results. The simulated results show that the initial disturbances of bullet at muzzle, the reduction in rotational velocity and the variation in bullet's surface topography increase as the firing cycle increases, especially in barrel's later lifetime. Variation in muzzle-leaving state of bullet is the key factor for barrel's life end. Research results have important significance on further studying how bore damage degrades bullet's exterior ballistics performance and the end-of-life mechanism of barrel. Key

Key words: barrellifetest, boredamage, interiorballisticsperformance, muzzle-leavingstate, finiteelementmethod

中图分类号:

TJ203⁺.1

沈超，周克栋，陆野，乔自平. 内膛损伤枪管对内弹道性能和弹头出膛状态的影响研究[J]. 兵工学报, 2019, 40(4): 718-727.

SHEN Chao, ZHOU Kedong, LU Ye, QIAO Ziping. Research on the Influence of Damaged Barrel on Interior Ballistic Performances and Muzzle-leaving State of Bullet[J]. Acta Armamentarii, 2019, 40(4): 718-727.

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内膛损伤枪管对内弹道性能和弹头出膛状态的影响研究

Research on the Influence of Damaged Barrel on Interior Ballistic Performances and Muzzle-leaving State of Bullet

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