Research on parameter setting of underwater explosion simulation

DOI:	10.11809/bqzbgcxb2023.08.029
Keywords:	underwater explosion; parameter setting; grid density; shock wave; bubble pulsation
Abstract:	This paper studies the influence of parameter setting in underwater explosion simulation on shock wave and bubble pulsation loads. Firstly, a one dimensional wedge grid is constructed, and the effects of flow out, transmit and none boundary conditions on the bubble pulsation characteristics are studied, which shows that a large enough water area should be established to simulate infinite water so as to eliminate the effect of the boundary on bubbles. And then, simulation models with different water area sizes are established, the results of which show that the appropriate water area radius under the charging condition is 1 200 times the charging radius. Finally, the effect of grid density on peak pressure of underwater explosion shock wave is analyzed, and the calculation formulas for calculating the minimum grid size under 5% and 10% errors are given. These results can provide important reference for high precision simulation of underwater explosion loads.
Published:	2023-08-28
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