Air blast pressure characteristics of moving charge

Air blast pressure between moving charge and static charge are obviously different, however, due to the limitation of testing means, most blast or impact experiments were conducted under static state, which bring risks to evaluate safety of the target structures. In this paper, based on the finite element software and theoretical analysis, we investigated characteristics of the air blast pressure of moving charge. By introduced the toroidal distribution coefficient and radial distribution coefficient, a calculation model, used to calculate the overpressure with scope of relative distance at range of 0.4∼2 m/kg1/3 around blast center was established. The model could quickly calculate overpressure distribution around the blast center. Furthermore, isobars lines of moving charge were obtained by solving the model, some other phenomena were also analyzed.