Abstract:
In the actual combat process, the ammunition mainly damages the target in the form of dynamic explosion, so it is more practical to study the fireball distribution characteristics of the projectile in the moving state on the target damage effect. In this paper, a high-speed camera is used to capture the video of the explosion process of the static explosion and the simulated dynamic explosion fireball under the same conditions. In the test, the TNT equivalent of the ammunition is 9.53 kg, and the movement speed of the charge is set to 335 m/s, 680 m/s, 930 m/s. The images are passed process and obtain the fireball contour, geometric size, and center of mass migration trajectory, and conduct a comparative analysis to quantitatively study the difference between the fireball distribution characterization parameters under different charging speeds. The analysis results show that the explosive fireball is affected by the charging speed more obviously, which mainly reflects as follows: the static explosive fireball is distributed in a relatively regular sphere, while the dynamic explosive fireball is affected by the movement speed of the charge and the angle of attack of the projectile, therefore the dynamic explosive fireball migrates in the positive direction of the projectile speed, presenting an ellipsoidal distribution state; It is concluded that the transition state of the image centroid of the fireball can be used to distinguish the static and dynamic explosion, by analyzing the motion trajectory of the image centroid of the static and dynamic explosion fireball.