Research on numerical simulation of submunition dispenser under different dispersion state

In order to study the process of submunition airbag dispersal under different dispersion state, the p-t curve of gas generator combustion obtained by closed bomb test was transformed into the mass flow rate-time curve to simulate the process of airbag inflation. As the initial condition, it was input into the finite element model of submunition dispersal established by LS-DYNA software, and the results were compared with the literature data to verify the accuracy of the calculation method. Then, through the numerical simulation of airbag dispersion of submunition with different centroid positions and initial placement angles, the simulation results show that the dispersal velocity of the submunition decreases with the increase of the offset of the centroid in the x direction and the placement angle. The peak overload decreases with the increase of centroid offset and placement angle. The angular velocity of the submunition rotating around the y axis increases with the increase of the offset of the centroid in the x direction; the velocity of submunition rotating around x axis increases with the increase of the offset of centroid in y direction.