A Simplified Model of Numerical Simulation of Ship Collisions

A model combined with detail F.E. mesh and Inertia Equivalence model for using in numerical simulation of ship collisions is introduced. In this model only the structural members in bow of striking ship and in direct collision zone of struck ship are represented by fine mesh of F.E.. The rest parts of ship hull are represented by beam element possessing equivalent mass and stiffness of ship hull girder. The behavior of structure of local collision zone and general effects of ship hull can be simulated correctly. The results of collision force and energy absorption obtained from this model have a good agreement with that from a simulation by fluid structure coupling model. It is verified that the simplified model required very simple work on building model and apparently lessens CPU time.