Research on the energy dissipation characteristics of explosives underwater explosion

To analyze the energy dissipation characteristics of explosives underwater explosion, the performance parameters of underwater shock wave generated from explosive TNT, RS211, RBUL, GUHL were studied. The pressure-time curves of underwater shock wave were obtained experimentally from difference distances at far field of underwater explosion. The attenuation of peak pressure, shock wave energy and bubble energy were calculated. The energy dissipation characteristics of explosives were also analyzed for the far field of underwater explosion. The results show that the peak pressure of explosive RS211 and RS3-4 is comparatively high, the energy attenuation velocity of explosive RBUL and GUHL is relatively slow than that of the explosives researched in the paper, the underwater explosion energy of RBUL and GUHL can be 1.8 times as TNT equivalent. When 5 kg explosive explodes underwater, its total heat energy loss increases in a parabola form at the 0~3 m field, increases linearly over 3 m field, and the energy dissipation effect can be neglect beyond 5 m.