两类不同侵彻阻应力公式对比及其对侵彻弹道计算的影响分析  

Comparison of two different penetration resistance stresses and analysis of the influence on the calculation of penetration trajectory

作　　者：余双洋 彭永[1] 赵建军 YU Shuangyang;PENG Yong;ZHAO Jianjun(National University of Defense Technology,Changsha 410073,China;Defense Engineering Institute,AMS,PLA,Beijing 100850,China)

机构地区：[1]国防科技大学,湖南长沙410073 [2]军事科学院国防工程研究院,北京100850

出　　处：《防护工程》2023年第3期33-40,共8页Protective Engineering

基　　金：国家自然科学基金资助项目(11902355)

摘　　要：合理的侵彻阻应力描述是准确进行弹体结构设计和侵彻弹道计算的前提,针对Forrestal侵彻阻应力半经验公式基于垂直侵彻试验数据建立,却广泛用于斜侵彻弹体受力和弹道计算的实际情况,对两类物理机理差异较大的侵彻阻应力公式-Forrestal阻应力公式和BC阻应力公式,在应力分布、垂直侵彻受力、斜侵彻受力以及垂直侵彻深度、斜侵彻弹道等方面进行了综合对比研究。研究表明:BC公式在斜侵彻中对弹身的阻应力描述比Forrestal阻应力公式更为合理,在描述斜侵彻弹道角度偏转方面也比Forrestal阻应力公式更为稳定。Reasonable description of penetration resistance stress is a prerequisite for accurate design of projectile structure and calculation of penetration trajectory.In view of the fact that Forrestal's semi-empirical formula of pen⁃etration resistance stress is established on the basis of vertical penetration test data while it is widely used to calcu⁃late the force and trajectory of oblique penetration projectile,two kinds of penetration resistance stress formulas with different physical mechanisms are described as follows:The Forrestal resistance stress formula and BC resistance stress formula are studied in the aspects of stress distribution,vertical penetration force,oblique penetration force,vertical penetration depth and oblique penetration trajectory.The results show that BC formula is more reasonable than Forrestal formula in describing the resistance stress of projectile in oblique penetration,and more stable than Forrestal formula in the angle deflection of oblique penetration trajectory.

关 键 词：弹体 侵彻 阻应力 混凝土 终点弹道 

分 类 号：TJ06[兵器科学与技术—兵器发射理论与技术] TU37[建筑科学—结构工程]