Damage of ships for engine room section struck by bulbous bow

摘要

The engine room is the most important part of ship, which holds the power resource and the control center of whole ship. Damage of engine room after collision may induce the most serious loss of all collision conditions. In this paper, the LS-DYNA nonlinear finite element analysis program was used to simulate the ship collision, in which the engine room section of an 8,236TEU container was struck by a similar size of conventional bulbous bow and a high deformable bow structure. The damage conditions and crashworthiness of striking bow and struck hull structures have been compared. The impact level for evaluation of injuries of crews and damage of main engine or facilities will be investigated. The different collision cases were defined under combination of five parameters, which are the initial collision speeds, the attack angles, the local structural parts of struck hull, and the material properties of steel and structural type of striking bow. The relative motion, damage conditions, crash force and energy dissipation of struck and striking vessels for different collision cases were compared. The root mean square and maximum acceleration of check points specified on struck hull structures and center of main engine have been gathered to evaluate the impact level.