Study on Dynamic Response of a Small Caliber Gun Barrel in Interior Ballistic Period

Abstract

In order to study the dynamic response law of gun barrel in interior ballistic period, the dynamic response of gun barrel was obtained based on 3D-DIC data acquisition system. The thermo-elastic coupling model of barrel and the finite element model of barrel vibration under the following boundary conditions were established. Combining the calculation results of finite element model with collaborative simulation model, the impact points of 100 m vertical target were simulated by random theory. The finite element results were verified by experiments. The results show that the following boundary can lead to great non-uniformity of the stress response of the barrel along the axis direction, and the thermal load can increase the peak stress response of the inner wall of barrel. The muzzle vibration response in the interior ballistic period can be roughly divided into three parts(i.e., droop-rebound-droop), which can be better combined with the simplified collaborative simulation model to predict the single projectile dispersion of small caliber weapons.