Session: 02-09-02 Extreme Loading and Responses 2

Paper Number: 79898

79898 - Study on Protective Structure Penetrated by the Shaped-Charge Jet for Ship Hull 

The shaped charge with strong armor piercing and destructive ability could be used to attack the ship side structures. However, recent research on the protective structure to shaped charge jet (SCJ) mostly focused on the land armor instead of ship hull composed by multi-layer thin plate. Therefore, this paper aimed to study the protection ability of the ship side structures against the penetration of SCJ.

Based on the algorithm of Coupled Eulerian Lagrangian (CEL), the processes of the generation of SCJ after initiation and the penetration to the inner and outer ship side plates were simulated by the finite element analysis (FEA). Meanwhile, the residual velocity of SCJ after penetrating the side plate and the perforation area of the inner plate of ship side could be obtained. In order to compare with the FEA results, the damage caused by the SCJ to the inner and outer plates of the ship side was experimentally studied, and the residual velocity and perforation area were measured successfully. The comparison demonstrated that the values of the residual velocity and the perforation area obtained by simulation well agreed with the experimental results. The simulation indicated that the inner plate thickness of the ship side exposes perforation, and the velocity of the SCJ decreased after penetrating the inner plate.

Moreover, the influences of the ship side structural details, including the inner plate thickness, the distance between the inner and outer plates and the layout of the inner plate, on its protective ability against SCJ were investigated. The research indicated that increasing the thickness of inner plate and the spacing between inner and outer plates can effectively reduce SCJ residual velocity. Replacement of the inner plate with a multilayer plate could obviously reduce the SCJ residual velocity and the perforation area on the target.

The simulation method could describe the process of SCJ generation and penetration exactly, and the research results could provide references for the protective structural design of the ship hull attacked by SCJ.

Key words: shaped charge jet (SCJ), ship side structure, penetration, residual velocity, simulation

Presenting Author: Jingjing Song Wuhan University of Technology

Authors:

Jingjing Song Wuhan University of Technology
Jingxia Yue Wuhan University of Technology
Xiaobin Li Wuhan University of Technology
Runze Tan Wuhan University of Technology