In this paper,the influences of bore damage on the bullet-barrel interaction process and the mechanism of how bore damage results in the end of a machine gun barrel’s service life were studied,which had seldom been paid attention to in the past several decades.A novel finite element mesh generation method for the damaged barrel and a new transient coupled thermo-mechanical finite element（FE）model,which were based on the damage data obtained through barrel life tests,were developed to simulate the interior ballistics process of a coupled bullet-barrel system.Additionally,user subroutine VUAMP was developed in the FE model in order to take the bullet base pressure brought by propellant gas into account.Good consistency between the simulation results and the experimental results verified the preciseness of the proposed mesh generation method and the FE model.The simulation results show that the increase of bullet’s initial disturbance at the muzzle and the variation of its surface morphology caused by bore damage are primarily responsible for the life end of this 12.7 mm machine gun barrel.
类型: 期刊论文
作者: Chao Shen,Ke-dong Zhou,Ye Lu,Jun-song Li
来源: Defence Technology 2019年06期
年度: 2019
分类: 工程科技Ⅱ辑
专业: 武器工业与军事技术
单位: School of Mechanical Engineering,Nanjing University of Science and Technology,No.Institute of China Ordnance Industry
基金: supported by the National Natural Science Foundation of China(grant number 11802138),the China Postdoctoral Science Foundation(grant number 2018T110503),the Fundamental Research Funds for the Central Universities(grant number 30918011302)
分类号: TJ41;TJ203.1
页码: 972-986
总页数: 15
文件大小: 3788K
下载量: 9
本文来源: https://www.lunwen66.cn/article/970c2f04417348364dc32be8.html