5.8mm/7.62mm模块化步枪运动特性匹配分析

不同口径步枪匹配问题是变口径模块化步枪系统研制需解决的关键问题。利用Adams软件建立了5.8 mm和7.62 mm变口径的模块化步枪数值仿真模型，通过与试验数据对比验证了模型的正确性。基于该模型进行了枪机框运动特性匹配、供弹匹配和抛壳匹配分析。引入了枪机框运动特性匹配度的概念，建立了枪机框运动特性匹配准则，根据该准则得到了合理的设计方案。结果表明：通过改变导气孔直径，可以基本实现枪机框运动特性匹配；改变供弹斜面的倾角和增加圆角，可以提高两种步枪弹供弹匹配性和稳定性；通过更改抛壳窗位置可以实现两种步枪弹抛壳匹配。

Analysis of Kinetic Characteristic Matching of 5.8 mm/7.62 mm Modularized Rifles

The matching of alterable caliber rifle is the key problem of the development of alterable caliber modularized rifle system. The numerical simulation models are established for 5.8 mm and 7.62 mm caliber rifles, and the numerical simulation models are verified by comparing the simulation results with the experimental results. The kinetic characteristic matching of bolt carrier, the ammunition feed matching and the ejection matching are analyzed based on the models. The matched-degree principle of the bolt carrier’s kinetic characteristic matching is built, and according to this principle, a reasonable design project is selected. The result shows that the kinetic characteristic matching of the bolt carrier can be achieved well by changing the diameter of the gas chamber; the stability of ammunition feed and the ammunition feed matching can be improved by changing the angle of ammunition feed slope and the rounding edges; and the change in the position of the ejection port is an efficient measure of ejection matching.