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Far-Field Underwater Explosion Shock Wave Propagation Simulation Using the Three Dimensional Discontinuous Galerkin Method

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1 College of Engineering, Peking University, Beijing, 100871, China
2 College of Engineering, Ocean University of China, Qingdao,266100, China

* Corresponding Authors: Wenbin Wu; Moubin Liu. Email: ;

The International Conference on Computational & Experimental Engineering and Sciences 2024, 29(1), 1-1. https://doi.org/10.32604/icces.2024.011054

Abstract

The underwater explosion (UNDEX) could cause the fatal damage of naval ships and submarines in the naval battle, and seriously threaten their combat capability [1]. The UNDEX process is very complicated, including the propagation and reflection of the shock wave, formation and collapse of cavitation zone, trainset dynamic structural response and so on [2]. In this paper, we develop the three-dimensional Discontinuous Galerkin method (DGM) model for simulating the propagation of incident shock loading in fluid domain. The pressure cutoff model is employed to deal with the cavitation effect due to the reflection of the shock wave. The model can capture the strong discontinuity of the pressure peak and eliminate numerical oscillations due to the nonlinear cavitation phenomenon. By comparing with several benchmarks, the present model is verified in simulating the shock wave propagation, and exhibits better properties than the acoustic finite element method. And the shock wave loadings calculated by the present model have an obvious tendency to increase abruptly, which is more in line with the loading characteristics of discontinuous shock waves.

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Keywords

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