车载机枪托架行进间发射动力学分析与优化  

Dynamic analysis and optimization of vehicle-mounted machine gun brackets during moving firing

作　　者：郁卫星 杨臻[1] 刘万川 张梦飞 景春温 YU Weixing;YANG Zhen;LIU Wanchuan;ZHANG Mengfei;JING Chunwen(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Chongqing Jianshe Industry(Group)Co.,Ltd.,Chongqing 400054,China)

机构地区：[1]中北大学机电工程学院,太原030051 [2]重庆建设工业(集团)有限责任公司,重庆400054

出　　处：《兵器装备工程学报》2023年第7期94-100,共7页Journal of Ordnance Equipment Engineering

基　　金：166项目(222-CXCY-M116-01-02-02)。

摘　　要：托架是车载机枪上的主要承力构件,其刚强度和动力学性能会对车载机枪射击产生较大影响。基于路面不平度理论和发射动力学理论,建立了某12.7 mm车载机枪的行进间发射动力学模型。对行进间射击时的车载机枪托架,在极限射角及平射状态分别进行10发连射过程的仿真分析。以减轻托架结构质量和降低托架支撑板行进间发射时的交错变形为目标,结合拓扑优化分析与参数化建模方法,对托架进行结构优化设计,并对优化前后的托架力学性能进行对比。分析表明:平射时托架工况最为恶劣,托架满足强度要求;托架支撑板交错变形会引起枪口产生0.011 3 mm的偏移,通过对托架结构优化设计,结构质量减小31.82%,提高托架支撑板刚度匹配性,支撑板的交错变形量减小85%。对车载机枪及遥控武器站的设计具有指导意义,为其他机载武器及遥控武器站设计提供参考依据。A bracket is the main load-bearing component of a vehicle-mounted machine gun,and its stiffness and dynamic performance will have a great impact on vehicle-mounted machine gun shooting.Based on road roughness theory and launch dynamics theory,this paper establishes a dynamic model of a 12.7 mm vehicle-mounted machine gun during moving firing.A simulation analysis of ten-round continuous firing process of a vehicle-mounted machine gun bracket at the limit angle of firing and the state of flat firing is carried out respectively.Aiming at reducing the quality of the bracket structure and reducing the staggered deformation of the bracket support plate when it is moving,the optimization design of the bracket structure is carried out by combining topological optimization analysis and parametric modeling,and the mechanical properties of the bracket before and after optimization are compared.The analysis shows that the bracket working condition is the worst when the machine gun is fired flat,and the bracket meets the strength requirement.The staggered deformation of the bracket support plate causes a muzzle offset of 0.011 3 mm.Through the optimized design of the bracket structure,the structure mass reduces by 31.82%,the stiffness match of the bracket support plate is improved,and the staggered deformation of the support plate reduces by 85%.It is instructive to the design of vehicle-mounted machine guns and remote control weapon stations,which provides reference for the design of other airborne weapons and remote control weapon stations.

关 键 词：行进间射击 托架 刚强度 参数化建模 结构优化 刚度匹配性 

分 类 号：TJ26[兵器科学与技术—武器系统与运用工程]