基于火药燃气压力空间变化的火炮发射动力学研究  

Artillery firing dynamics based on spatial variation of propellant gases pressure

作　　者：于情波 杨国来[1] 葛建立[1] 孙全兆[1] 萧辉[1] YU Qingbo;YANG Guolai;GE Jianli;SUN Quanzhao;XIAO Hui(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《振动与冲击》2018年第17期141-147,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(11572158)

摘　　要：针对身管振动对弹丸内弹道时期运动形态的激励作用,建立以振动理论为基础的弹丸与身管相互耦合问题的有限元动力学模型。通过用户自定义子程序实现了模块装药下弹丸膛内运动与火药燃烧规律相互关联的动力学过程,并实现了火药燃气压力作用于身管内壁并随弹丸运动而变化的荷载条件,解决了以往燃气压力径向效应加载不准甚至无法加载的问题,得到了在相同射击条件下试验测试数据和仿真计算结果的对比曲线,以及不同数值模拟环境下身管动力学时程曲线。结果表明该非线性动力学模型更能反映火炮实际发射环境,可以较真实地再现身管结构动力学响应过程,为火炮设计以及故障分析提供了更接近实际的参考数据。Considering excitation action of barrel vibration on motion form of projectile in its inner-ballistic period,the finite element dynamic model for the mutual coupled problem between projectile and barrel based on the vibration theory was built.The user-defined subroutine was utilized to realize projectile dynamic process related to propellant combustion law under module charge,and realize the actual loading conditions varying with projectile motion during propellant gas pressure acting on barrel inner-wall,and solve the problem of gases pressure radial effect’s inaccurate loading or being unable to load in previous simulation.The curve comparison between test data and simulation results under the same shooting conditions was obtained.The barrel’s dynamic response time history curves under different simulation conditions were also gained.The results showed that the established nonlinear dynamic model can better reflect the actual artillery firing condition;it can more actually reveal barrel structural dynamic response process;it provides reference data closer to reality for artillery design and fault analysis.

关 键 词：身管实际荷载条件 用户自定义子程序 弹炮耦合 数值模拟 空间变化 

分 类 号：TJ33[兵器科学与技术—火炮、自动武器与弹药工程]