Dumbbell-Shaped Damage Effect of Closed Cylindrical Shell Subjected to Far-Field Side-On Underwater Explosion Shock Wave

In naval warfare, underwater explosion (UNDEX) shock waves significantly influence the stability and safety of pressure hull structure equipment. This study investigated unique dynamic buckling a closed cylindrical shell subjected to far-field side-on UNDEX wave using three-dimensional numerical simulation based on acoustic–structural arithmetic. particular, flow-field response characteristics, plastic deformation, yield characteristics were determined under wave. Subsequently, failure mode was analyzed propose dumbbell-shaped damage effect. The results revealed that when encounters finite shell, fluid exhibits perturbation such as division, stress deflection, flow in surroundings circular cylinder. However, cannot produce sizeable instantaneous displacement yields certain strong constraints at both ends shell. These generate an irregular distribution field pressure, tends exhibit “arch” deformation along direction propagation. Owing surrounding cylinder, negative zone is generated which induces “sucking disc” shape ultimately produces present findings will aid structural design impact resistance submarines, unmanned undersea vehicles, additional equipment load UNDEX.