基于不同内膛结构参数的弹带挤进阻力特性研究

Research on Engraving Resistance Characteristic of Band Based on Different Structure Parameters of Bore

身管在火药燃气作用下内表面发生周期性的冷热循环作用,导致内膛表面发生烧蚀与磨损,尤其是身管膛线起始部最为严重,当这种烧蚀与磨损作用达到一定程度,身管就会失去应有的弹道性能。论文在前期研究工作基础上,以某大口径榴弹炮为研究对象,考虑高速高压环境中的滑动摩擦力变化,同时考虑挤进过程中的能量守恒准则,将经典内弹道方程组与弹带挤进过程耦合起来,进行直接耦合求解,同时运用显式动力学算法对比不同膛线结构参数下弹带挤进过程的差异,分析不同膛线结构参数对弹带挤进过程受力状态的影响,得到挤进系统主要结构参数对弹带挤进过程的影响规律,从而为身管武器一体化设计、身管结构优化、弹带材料的选择、内弹道初速稳定性分析等提供参考。

Under the action of gunpowder and gas,the inner surface of the barrel undergoes periodic cooling and heating cycles,resulting in ablation and wear on the surface of the inner bore,especially the beginning of the barrel's rifling is the most serious,the barrel will lose its proper ballistic performance.Based on the previous research work,this paper takes a large-caliber howitzer as the research object,considers the change of sliding friction in the high-speed and high-pressure environment,and considers the energy conservation criterion during the extrusion process.The process is coupled,and the direct coupling solution is carried out.At the same time,the explicit dynamic algorithm is used to compare the difference in the extrusion process of the elastic belt under different rifling structure parameters,and the influence of different rifling structure parameters on the force state of the elastic belt extrusion process is analyzed,and the extrusion process is obtained.The influence law of the main structural parameters of the system on the extrusion process of the elastic belt can provide a reference for the integrated design of the barrel-tube weapon,the optimization of the barrel-tube structure,the selection of the material of the elastic belt,and the stability analysis of the initial velocity of the inner ballistic.