Analysis of the explosion venting holes in the cabin explosion on the structural response

Abstract Firstly, the damaging effect of the internal explosion in a closed cabin by numerical simulation has been evaluated, which indicates that the pressure peak of the shock wave and the duration of positive pressure in the closed cabin has been increased at a large scale compared with the free field, and the corner-structures of the cabin have been damaged seriously under the shock wave at the same time. Then the explosion response effect of the hull superstructure which has an explosion venting hole has been analysed, and the pressure peak of the shock wave in a different location and the superstructure which has a different explosion venting hole size has been compared, which shows that the explosion venting holes have a strong impact on cabin explosion shock wave propagation, the scope and ratio of the venting explosion depend linearly on the characteristic length of explosion venting holes, and the explosion venting holes can protect the cabin corner structure within certain TNT limits. It is concluded that setting a reasonable size and proper location of the explosion venting holes can achieve the purpose of protecting the important compartments.