Research on Damage of Underwater Shock Waves at Multiple Explosion Points to Ships

Abstract

In order to study the impact of shallow water explosion shock wave on the ship damage and the overpressure distribution law under different burst points and different explosive quantity and charge, the TNT column bare charge is selected, based on LS-DYNA finite element software, the underwater explosion model is created, and the numerical simulation study of underwater explosion under different burst points is carried out, and the correctness of the finite element model is verified by comparing with the empirical formula. The results show that: the numerical simulation of the underwater explosion shock wave results affected by the mesh size, the use of explosive diameter of 1/10 ~ 1/5 of the mesh size can be more accurate simulation results; the use of torpedo scattering mode of operation, the bottom of the middle part of the ship after hitting the damage effect is much greater than when not hit, hit the ship and the head and stern side of one of the best damage effect; only hit the stern sides of the case when, 100kg of explosives can do the same or better than 200kg of explosives damage effect, can save part of the resources. It can provide some reference for the study of shallow water explosion damage to ships and torpedo dispersal operations.