摘要
针对大长径比智能弹药发射过程可靠性与安全性要求高、影响因素复杂、参数设计难度大等特点,采用SPH光滑粒子算法建立某舰炮弹炮耦合模型,对关键结构采用有限元与关键参数化相结合的方法,考虑挤进、膛内运动弹炮耦合过程,结合Vuamp子程序,实现了挤进过程中内弹道计算与弹炮耦合有限元仿真联合求解。以弹丸出膛姿态,身管炮口振动输出参数表征,构建载荷、边界等与响应输出的映射关系,通过参数灵敏度分析获得各个输入参数对炮口状态的影响程度。得出大长径比弹丸质心在轴线上的偏移是占比最高的影响因素。该过程与结果为进一步提升火炮可靠性提供方法与依据,以便获得最优弹炮参数设计区间。
In view of high launch reliability and safety requirements,complex influencing factorsand the difficulty in parameter design of theintelligent ammunition with large length-to-diameter ratio,a projectile-barrel coupling model for a certain naval gun was established based on the SPH(Smoothed Particle Hydrodynamics)algorithm.The finite element model with key parameterization of key structures was studied,as well thesqueezing-in and in-bore motion projectile-barrel coupling process was analyzed combined with the Vuamp subroutine,the internal ballistic calculation and projectile-barrel coupling finite element simulation in the squeezing-in process were realized.Mapping relationships between loads,boundaries and response outputs were establishedby characterizing the projectile exit posture andmuzzle vibration output parameters.The influence of each input parameter on the muzzle state was obtained by the sensitivity analysis of parameters.It is concluded that the offset of the center of mass of the large length-to-diameter ratio projectile along the axis is the most influential factor.This process and results provide a method for further improving the reliability of artillery,so as to obtain the optimal design range of projectile and gun parameters.
作者
李子涵
高小科
王军
刘宁
LI Zihan;GAO Xiaoke;WANG Jun;LIU Ning(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712099,Shaanxi,China)
出处
《火炮发射与控制学报》
北大核心
2025年第3期41-48,共8页
Journal of Gun Launch & Control
关键词
大长径比弹药
弹丸结构
弹炮耦合
灵敏度分析
large length-to-diameter ratio ammunition
projectile structures
projectile-barrel coupling
sensitivity analysis
