火炮内弹道挤进过程导转侧力特性  

Mechanical Property of Rifling s Steering Side DuringEngraving for Interior Ballistics of Gun

作　　者：梁林 李翔 彭松江 王炳哲 LIANG Lin;LI Xiang;PENG Songjiang;WANG Bingzhe(rd Research Institute of China Shipbuilding Industry Co.,Zhengzhou 450015,China)

机构地区：[1]中国船舶第七一三研究所,河南郑州450015

出　　处：《弹道学报》2024年第3期12-18,共7页Journal of Ballistics

摘　　要：为研究弹丸挤进过程膛线导转侧与弹带的力学响应,基于能量法推导弹丸挤进过程弹带运动、变形及其与膛线相互作用的力学机理,根据经典内弹道理论分析了弹带挤进后与膛线导转侧受力关系,分别得到挤进过程和挤进后导转侧受力的一般表达式,并分析了挤进过程及挤进后导转侧受力的主要影响因素。采用弹塑性有限元方法模拟弹丸膛内运动过程,获取多种工况下导转侧受力动态响应,分析导转侧受力变化特性,以及挤进过程中导转侧力受挤进速度和坡膛角的影响规律。研究表明:弹丸挤进过程导转侧受力与挤进速度、坡膛角正相关,挤进后导转侧受力与弹底压力变化趋势一致;在一定速度范围内,弹丸挤进过程的导转侧受力远大于最大膛压时刻,且随着速度增加,挤进过程导转侧受力与最大膛压时刻的比值有明显增大的趋势;对于弹丸启动后自由行程较长的埋头弹火炮,挤进过程受力更为恶劣,需加强装药结构及优化坡膛结构为提高身管寿命创造条件。研究结果可为弹丸结构设计及弹炮匹配性分析提供理论参考。To study the mechanical response about rifling s steering side and band in engraving process,the motion,deformation of band and its mechanical mechanism during projectile engraving process were deduced based on the energy method,and the force relation between the rifling s steering side and band after engraving was analyzed according to the classical interior-ballistics theory,and the general expressions of the force on rifling s steering side during engraving process and after engraving were obtained.The influencing factors of the force on rifling s steering side were analyzed.Interior ballistics was simulated by using an elastic-plastic finite-element-method,and dynamic responses of the force on rifling s steering side were obtained under various operating conditions.The force on rifling s steering side,influence law of engraving velocity and angle of forcing cone were analyzed.The researches show that the force on rifling s steering side is positively correlated with engraving velocity and angle of forcing cone,and its trend of change is consistent with the bottom pressure of the projectile after engraving in.Within a certain range of velocity,the peak of the force on rifling s steering side during projectile engraving is much larger than that at the moment of maximum chamber-pressure,and the ratio of them shows a significant increasing trend as the engraving velocity increases.For the cased telescoped ammunition with longer free-travel-distance,the force is more complex in engraving process,so it s necessary to strengthen charge structure and optimize forcing cone to improve the barrel life.The calculation methods and conclusions mentioned can provide theoretical reference for projectile structure design and analysis of projectile-barrel matching.

关 键 词：内弹道 导转侧受力 挤进速度 坡膛角 弹炮匹配 

分 类 号：TJ391[兵器科学与技术—火炮、自动武器与弹药工程]