A simplified internal and external mechanic model for ships' collision

摘要

The purpose of this paper is to present a simplified analytical method for the external and internal mechanics during a collision situation. The simplified external mechanics model can simulate the rigid body motion of the colliding ships. Added mass at infinite frequency is assumed to take into account the surrounding water effects. The derived mathematical model is applied to a collision between two ships. The results are compared with the results of FEM simulations and good agreement has been achieved. The simplified external mechanics model can be well integrated with the simplified internal mechanics model and the simultaneous interaction between the external and internal mechanics can be simulated.