Research on Anti-explosion Performance of Polyurea Elastomer Based on RKDG-FEM Coupling Algorithm

Polyurea elastomer with excellent performance has a protective effect on structures. It has great significance to investigate its failure mechanism, which can provide technical support for ship protection design. In this paper, in order to investigate the anti-explosion performance of polyurea/steel plate composite structure a fluid–structure interaction (FSI) model of underwater explosion based on Discontinuous Galerkin method (RKDG) and Finite Element method (FEM) is established. Firstly, the dynamic response of steel plate under the action of shock wave load is calculated, then, according to the surface density theory, the protection effect of polyurea sandwich structure is studied, and the influence of polyurea elastomer on the disturbance of composite structure and the wave dissipation and energy absorption characteristics of polyurea elastomer are compared and analyzed.