基于Timoshenko梁理论的枪口振动灵敏度分析及优化  

Sensitivity analysis and optimization of gun muzzle vibration based on Timoshenko beam theory

作　　者：伍代强 徐诚[1] 杨宇召 WU Daiqiang;XU Cheng;YANG Yuzhao(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：《兵器装备工程学报》2023年第3期89-94,157,共7页Journal of Ordnance Equipment Engineering

基　　金：国防重点攻关任务项目(**2020*208003)。

摘　　要：为了评估弹丸/身管参数对枪口振动的影响,减小枪口扰动,基于Timoshenko梁理论以及传递矩阵法建立了射击过程中枪管振动模型与计算方法,以某5.8 mm口径步枪为研究对象,定量分析了枪口振动特性,分析结果与实验结果基本一致。选取了关键参数(枪管横截面积、枪管密度、枪管弹性模量、膛线深度、膛线缠角、弹丸质量、坡膛锥角和弹丸质量偏心)进行灵敏度分析,得到了枪管以及弹丸结构参数对枪口振动以及枪管模态的影响。并以弹丸出膛时的枪口振动位移和枪口振动速度为目标,采用逐层优化方法得到一组优化值,优化后的枪口垂直方向位移值为0.0731 mm,比初始值0.0775 mm降低了5.8%,枪口速度值为386.97 mm/s,比初始值412.68 mm/s降低了6.23%。In order to evaluate the influence of projectile/barrel parameters on gun muzzle vibration and reduce muzzle disturbance,this paper establishes a muzzle vibration model and calculation method during firing based on Timoshenko beam theory and transfer matrix method.Taking a 5.8 mm-caliber rifle as the research object,the muzzle vibration characteristics are quantitatively analyzed,and the analysis results are basically consistent with the experimental results.The key parameters(barrel cross-sectional area,barrel density,barrel elastic modulus,rifling depth,rifling winding angle,projectile mass,forcing cone slop and projectile mass eccentricity)are selected for sensitivity analysis,and the effects of structural parameters of the barrel and the projectile on muzzle vibration and barrel mode are obtained.In addition,aiming at the muzzle vibration displacement and muzzle vibration velocity,this paper obtains a set of optimization values by using the progressive optimal algorithm.Vertical displacement value of the optimized muzzle is 0.0731 mm,which is 5.8%lower than the initial value of 0.0775 mm;the muzzle velocity value is 386.97 mm/s,which is 6.23%lower than the initial value of 412.68 mm/s.

关 键 词：TIMOSHENKO梁 枪口扰动 灵敏度分析 优化设计 数值仿真 

分 类 号：TJ22[兵器科学与技术—武器系统与运用工程]