Numerical study of underwater explosion shock wave and bubble pulse

Underwater explosion shock wave and bubble pulse were simulated by using the hydrocode AUTODYN.Firstly the shock wave induced by spherical charge exploding in infinite water region was simulated.Secondly the underwater explosion and following bubble pulses in deep water were simulated through one-dimensional method under certain assumptions.After compared calculation results with empirical formulas,theoretical formulas and experimental results,it can be concluded that AUTODYN can simulate much of the important physics of underwater explosion including shock wave,bubble pulse,second pressure wave,and water particle velocity etc.Nevertheless the main limitation that the peak pressure of shock wave at far-field is less than empirical magnitude was also identified.Finally the suggestion for the engineering application of AUTODYN was given.