S-175船关键剖面的入水砰击模拟

Full-sized models of the bulbous bow, parallel middle body, and stern were established in accordance with the body plan of an S-175 containership for the precise prediction of the water-entry slamming impact of a real ship in rough seas. LS-DYNA software was used to simulate the bulbous bow, parallel middle body, and stern. The explicit finite element method and the arbitrary Lagrangian-Eulerian algorithm were utilized to track the boundary movement of the material structure and avoid serious grid distortion effectively. A two-dimensional rigid wedge was simulated to verify the reliability and accuracy of the numerical model. The computed results were in good agreement with the published experimental data. Then, the water-entry slamming of three sections were simulated on the basis of the sinking velocities of different local sections reported by previous work. This study has a certain reference value for load prediction and ship-form optimization.