Numerical simulation of the coupled dynamics model of the projectile engraving process  

作　　者：Shujun Zhang Xiaoting Rui Hailong Yu Xiaoli Dong 

机构地区：[1]Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing,China [2]National Key Laboratory of Complex Multibody System Dynamics,Nanjing,China

出　　处：《International Journal of Mechanical System Dynamics》2024年第2期188-201,共14页国际机械系统动力学学报（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:12372093。

摘　　要：The projectile engraving process directly influences the projectile motion in-bore and impacts the firing accuracy,firing safety,and barrel life of the gun.For this reason,attention has been focused on this research topic.To address the limitations of the“instantaneous engraving”hypothesis adopted in the classical interior ballistic theory,the VUAMP user subroutine,one of ABAQUS's secondary development interfaces,is utilized in this paper to realize the modeling and numerical simulation of a coupled dynamics model of the projectile engraving process.In addition to facilitating engineering applications,a polynomial fitting formula of the engraving resistance obtained by simulation is proposed and then used as a supplement to establish a closed and solvable interior ballistic model considering the projectile engraving process.By comparing with test data,the simulation accuracy of the coupled dynamics model is verified.Simulation results reveal that the engraving process takes 3.8 ms,accounting for 26%of the whole launch process,which takes 14.6 ms,demonstrating that the process is not instantaneous.The results of this paper can serve as a reference for future studies on the coupled solution of the projectile engraving process and interior ballistics of guns or gun-like equipment.

关 键 词：projectile engraving process engraving resistance finite element method polynomial fitting interior ballistic simulation 

分 类 号：TJ41[兵器科学与技术—火炮、自动武器与弹药工程]