摘要
基于弹性碰撞的恢复系数,提出一种重点考虑弹丸设计参数的弹丸膛内运动模型,分析了弹丸的主要结构参数对膛内运动的影响。模型中没有采用把恢复系数看作常数的近似方法,而是对弹炮系统的简化模型进行有限元仿真,得到恢复系数随前定心部径向速度变化的函数关系。以155 mm榴弹的特征参数为计算量,对影响弹丸膛内运动的各因素进行了实例计算和分析。结果表明:弹丸结构参数的变化与膛内运动特性之间存在一般规律性,对选用合理的弹丸结构来保证膛内运动的正确性有一定的应用价值。
Based on the restitution coefficient of elastic collision, the projectile in-bore motion model was proposed with design parameters mainly considered. Analyze the influence of projectile＇s main structural parameters on the motion. The approximate method that the restitution coefficient was seen as constant wasn＇t used. Through the finite element simulation on the simplified model of gun-projectile system, the functional relation between the restitution coefficient and the radial velocity of the front bourrelet was acquired. The characteristic parameters of the 155mm shrapnel were used as the calculation parameters. Calculation and analysis about the various factors influence on the motion. The results show that there is general regularity between the projectile＇s structural parameters and its in-bore motion characteristics. It is useful for selecting a reasonable structure for the projectile to ensuring the regular in-bore motion.
出处
《兵工自动化》
2013年第3期35-38,共4页
Ordnance Industry Automation
关键词
弹丸
结构参数
膛内运动
恢复系数
projectile
structural parameter
in-bore motion
restitution coefficient
