Ship Motions And Wave Loads Considering Initial Transverse Inclination

Prediction of the motions and wave loads acting on ships sailing on the sea is very important to the FEM, the probability analysis and the fatigue analysis of ship structures. The Strip Theory can meet the demand of shipbuilding engineering. But the common method can only use on ships with lateral symmetry which is in the state of zero trim. This paper will present an improved method which can take account of the transverse inclination and predict the motions and wave loads of a ship in heel.Firstly, the model of ship with the sate of heel is developed and then the hydrostatic forces and mass matrix of such model is calculated. Secondly, proportional arc length method is used to conformal mapping process of asymmetry sections so as to solute the 2D radiation problem with the method of multipole expansion. On the basis of above, 3D hydrodynamic coefficients are given and motions of the container ship FLOKSTRA are predicted considering the initial heel. In the end, the calculation dealing with the sectional wave load acting on a ship in the state of heel is made.