Experimental and numerical investigation of blast loads induced by moving charge explosion

Abstract

With the development of high-speed weapons, moving charge explosions frequently occur in industry and military activities, which will lead to significant damage to structures. In order to investigate the blast loads induced by moving charge explosion, explosion experiments are carried out. The pressure curves and blast load parameters are analyzed. Results indicate that the blast load distribution is directional in moving charge explosion, and the blast load parameters are influenced by distance and direction. Numerical simulation investigation is conducted to further study the effect of charge shape and velocity on blast loads induced by moving charge explosion. The numerical model is developed and verified with experiment data, which indicates that the numerical method is sufficiently accurate for moving charge explosion investigation. The numerical study characterizes the influence of charge shape and charge velocity on blast loads in different directions. The shape factors of cylindrical charge and the velocity factors of 580 m/s, 700 m/s, 900 m/s and 1200 m/s in moving charge explosion are analyzed. The results indicate that the charge shape effect must be considered in the near-field and the charge velocity effect must be considered in different directions, especially in directions with angles less than 90°. This research will contribute to combatant power evaluation, structural engineering and structural design.