Abstract: 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.