The Study Of A Method For Ascertaining Kinetic Energy During Vessels’ Collision Based On Finite Element Theory

Ship collision is a kind of complex nonlinear dynamic response process that the hull structure will be impacted by a huge loads in a relatively short time, the time of collision is different from ten thousandth seconds to a few seconds. In the short period of time, the collid ship’s initial kinetic energy is consumed and the loss energy will be absorbed by the hull’s deformation and transfer to the kinetic energy of collided ship gradually. Including the kinetic energy of collided ship^the energy of deformation absorption and other important data can not be obtained in the current technical conditions. It is a great inconvenience to the investigation and evidence gathering after the accident, in addition, it is impossible to restore the whole progress of ship’s collision by other methods. In recent years, the finite element software MSC, ANSYS/LS-DYNA and ABQUES were used to restore the collision process which is recognized by many scholars, these software are powerful but complex defects and inconvenience. Therefore, ascertaining a relatively accurate and practical simulation method is significant.In this thesis, the ANSYS Workbench software is used for the three-dimensional modeling and finite element simulation on a variety of collision situations, and getting the corresponding data of deformation of the hull and the remaining kinetic energy. Finally, this method has a desirable performance. It is not only a new method for the maritime accident reduction, but also an improvement on ship’s structural crashworthiness. Moreover, it will play a important role on controlling of the ship’s speed before the collision accidents and even providing referent evidence for maritime disputes.