小口径步枪枪管在连续单发射击下热效应特性

为分析小口径步枪枪管在热载荷和周边零件作用下热效应对枪管性能的影响,开展枪管表面有无周边零件对枪管温度场和热变形场差异研究.基于初始条件和热边界条件,在有限元分析软件ANSYS中建立高温火药气体热作用下三维枪管及周边零件的热-结构耦合模型.将热电偶固定在枪管表面,并对枪管表面10个位置进行温度测量,实验结果与仿真结果基...

Thermal Effect of Small Caliber Rifle Barrel under Continuous Single Shot Firing

In order to study the influence of thermal effect of small caliber rifle barrel on barrel performance under the action of thermal load and surrounding parts, the difference between the temperature field and thermal deformation field of barrel with or without surrounding parts on the barrel surface is studied. Based on the initial conditions and thermal boundary conditions, a three-dimensional thermal-structure coupling model of gun barrel and surrounding parts under the thermal action of high-temperature gunpowder gas is established using finite element analysis software ANSYS. The thermocouple was fixed on the surface of barrel, and the temperatures at 10 positions on the barrel surface were measured. The simulated results are basically consistent with the experimental results. The simulated results of temperature field and thermal deformation field show that there is obvious heat absorption phenomenon in the direct contact area between the surrounding parts and the barrel surface, and the temperature field of barrel is asymmetric due to the structure of the surrounding parts; the radial inner diameter of barrel increases, and expands unevenly along the axial direction; the radial axis of barrel deviates and shows an uneven deviation along the axial direction. The research and analysis of barrel thermal effect under the action of thermal load and surrounding parts can lay a foundation for the later optimization of gun temperature field and the improvement of firing accuracy.