Effects of Different Grounds on the Loading Characteristics of Limited Underwater Explosion from a Bottom Charge

In order to research the effects of different grounds on the shock wave propagation and the general laws of the bubble motion of underwater explosion from a bottom charge,principle experiments of underwater explosion were conducted in a water tank.Several physical phenomena observed such as bubble jetting and bubble migration from the different grounds were discussed.It is suggested that the shape and dynamic behavior of bubble have great dependence on the ground properties.Furthermore,underwater explosion from a bottom charge usually causes serious damage to the bottom,and the reflected wave is sometimes stronger than the incident shock wave such as for the rock ground.