某40 mm挤进试验台架身管内壁载荷特征研究  

Loading Characteristics of Inner Wall of 40 mm Engraving Testbed

作　　者：李璟文 李一凡 郭浩 付佳维 李延泽 李泽龙 LI Jingwen;LI Yifan;GUO Hao;FU Jiawei;LI Yanze;LI Zelong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Liaoning Qingyang Special Chemical Co.,Ltd.,Liaoning Qingyang 111002,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]辽宁庆阳特种化工有限公司,辽宁庆阳111002

出　　处：《装备环境工程》2025年第1期1-10,共10页Equipment Environmental Engineering

基　　金：国家自然科学基金(U2141246,11702137)。

摘　　要：目的模拟研究弹带挤进过程大口径火炮身管的内壁载荷特性,研制一个40 mm挤进试验台架,通过揭示该试验台架身管内壁载荷的变化规律,以证明台架能够获得与155 mm火炮近似的在挤进过程中身管内壁受到的弹带载荷。方法通过销盘试验获得白铜弹带与身管之间的摩擦因数随接触正压力与滑移速率变化的关系,利用最小二乘法拟合得到摩擦因数随接触正压力与滑移速率乘积变化的表达式,提出弹丸挤进时期弹带与身管之间的接触摩擦模型。基于弹带本构模型与弹带身管摩擦模型,建立台架的三维热力耦合挤进有限元模型,并与试验测试得到的弹丸速度结果进行对比。结果通过仿真计算得到挤进过程弹丸速度、身管内壁载荷、挤进阻力以及能量随时间的变化规律,挤进结束时的弹丸速度约为60 m/s,与台架的实测弹丸速度误差较小,且台架的身管内壁载荷与文献中155 mm身管内壁载荷相近。结论所提出的热力耦合有限元模型能够较好地计算40 mm挤进试验台架的弹带挤进过程,且该台架具备实验室模拟155 mm火炮弹带挤进过程的身管内壁载荷的能力。The work aims to simulate and study the loading characteristics of the inner wall of large caliber artillery barrels during the rotating band engraving process,develop a 40 mm engraving testbed,and reveal the variation of inner wall loading of the barrel provided by the testbed,so as to prove that the testbed can obtain a similar loading value applied on the barrel inner wall by the rotating band during the engraving process of 155 mm artilleries.The relationship of the friction coefficient between the cupronickel band and the barrel gun and friction parameters including normal pressure and slip speed was obtained through a friction test system.The expression of the friction coefficient as a function of the product of contact normal pressure and slip speed was fitted using the least squares method,and a contact friction model between the band and barrel during the projectile engraving process was proposed.A three-dimensional thermomechanical coupling finite element model of the testbed was established according to the constitutive model of the band and the band-barrel friction model.The predicted projectile velocity was compared with experimental tests.The variations of projectile velocity,loading on the inner wall of the barrel,engraving resistance and energy with time during the engraving process were obtained from simulation calculations.The projectile velocity after engraving in the testbed was about 60 m/s,whose error was small compared with the measured value.Moreover,the inner wall loading of the barrel in the testbed was similar to the inner wall loading of a 155 mm barrel in the literature.The thermomechanical coupling finite element model proposed in this paper can effectively calculate the projectile engraving process of the 40 mm testbed,and the testbed has the ability to simulate the loading characteristics of the barrel inner wall of 155 mm artilleries during the projectile engraving process in the laboratory.

关 键 词：挤进过程 弹炮耦合 身管内壁载荷 摩擦磨损试验 热力耦合 挤进台架 有限元分析 

分 类 号：TJ301[兵器科学与技术—火炮、自动武器与弹药工程]