Blast wave propagation characteristics of moving charge at diminished pressure

The effects of different diminished pressures on moving charge blast wave parameters were investigated by employing the AUTODYN software. Meanwhile, a theoretical calculation model was established to predict the peak overpressure of the moving charge under diminished pressure conditions and was verified by experimental data and numerical simulations. Results indicate that the model can evaluate the blast wave peak overpressure of moving charge at diminished pressure effectively. As the velocity of the moving charge increases, the peak overpressure of the blast wave from the moving charge increases when the azimuth angle is less than 90°, but it decreases when the azimuth angle is greater than 90°. The blast wave peak overpressure of moving charge decreases but the blast wave action range increases as the ambient pressure decreases.