摘要
为准确模拟弹丸的膛内运动过程,考虑了玻-碳混杂纤维缠绕复合材料发射筒内火药燃气压力的二维瞬态分布特性,建立了以接触碰撞理论为基础并计及火药燃气强动态冲击作用的非线性弹-管耦合动力学数值分析模型。通过有限元用户自定义子程序再现了火药燃气压力随时间、空间的动态变化规律及其与弹丸运动相互关联的动力学过程。数值分析结果与实弹射击试验对比,结果表明,所建立的数值仿真模型能够再现实际发射过程中的物理场变化规律,真实地模拟复合材料发射筒的动态应力响应,为复合材料发射筒铺层设计、优化及发射安全性评估提供理论支持。
In order to simulate the motion process of projectile in bore accuracy,the two-dimensional transient distribution characteristics of the propellant gas pressure in a glass/carbon hybrid filament winding composite launch canister was considered.Based on the contact collision theory and considering the strong dynamic impact of propellant gas,a numerical analysis model for the nonlinear coupling problems between the projectile and the launch canister was built.A user-defined subroutine was used to reconstruct the correlation kinetic process between the temporal and spatial variation of propellant gas pressure and the projectile motion.Numerical analysis results were compared with test data.The results show that the established numerical analysis model can reproduce the physical field changes in the actual launching process and the dynamics stress response of launch canister can be simulated more actually,providing a theoretical support for the design,optimization,and launch safety evaluation of the fiber composite launch canister.
作者
孙同生
王琪
于存贵
SUN Tongsheng;WANG Qi;YU Cungui(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Jiangxi Changjiang Chemical Co.,Ltd.,Jiujiang 332006,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第24期74-80,共7页
Journal of Vibration and Shock
关键词
玻-碳混杂纤维
发射筒
用户自定义子程序
弹-管耦合
有限元分析
glass/carbon hybrid
launch canister
user-defined subroutine
projectile-barrel coupling
finite element analysis
