Characteristic of Bubble Pulsation by Underwater Explosion

For researching the characteristic of bubble pulsation by underwater explosion,the PAMFLOW software and the calculation program of bubble pulsation based on JWL formula were chose to study,and the bubble pulsation of infinite water explosion was also calculated by empirical formula.The results show that the centre of bubble close to the bottom during the whole movement and form the shape of high speed jet to bottom;the expansion radius of bubble in underwater explosion is larger than in infinite water explosion.The two numerical simulation results is consistent with each other and accord with the empirical results,so those two ways to study bubble characteristic are reasonable.