Abstract
The aim of this work is to investigate the hydroelastic responses of rectangular, clamped light weight pyramidal sandwich plate structures with imperfection (LWPSPS-IM) subjected to water impact via analytical prediction and numerical simulation. Firstly, the characteristics of impact pressure and structure deformation are computed by using FEM program LS-DYNA based on the proposed 3D multi-physics computational model. Numerical results show that the impact pressure of total fluid-solid interaction (FSI) surface for LWPSPS-IM is lower than that of the perfect LWPSPS. In the theoretical approach, a novel analytical method is proposed to calculate the elastic constants of LWPSPS-IM. Then an engineering estimation model to predict the maximum deformation of LWPSPS-IM is developed, in which the total deformation is divided into two parts, i.e. local field deformation and global field deformation and they are both computed using analytical approach. Good agreement between the numerical results and ones obtained from the proposed analytical model is achieved.
Published Version
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