Analysis on Dynamic Response of Shipboard Protective Structure Subjected to Underwater Contact Explosion

The dynamic response of shipboard protective structure subjected to contact explosion load is one of the important issues in the anti-detonation and anti-shock design of ship.Considering various protective structural configurations of foreign surface ships,a numerical simulation was carried out on the shipboard protective structure with additional bulkhead based on a mono hull ship model,utilizing the finite element package ABAQUS commonly used for dynamic analysis,and the impacts of the shipboard protective structure on the anti-detonation and anti-shock performance were investigated.The comparison results and analysis showed that the anti-sho ck performance of outer plate of hull with additional protection was significantly improved,in which no crevasses were found other than a few of plastic deformations occurred in the structure.This design can fulfill th e protection requirement of the important inner spaces such as engine room from explosion loading,and it shows that the liquid-filled protective structure of double hull is the optimal configuration for anti-shock perf ormance.