ABSTRACT

This study investigates a ship's two degrees of freedom pitch and heave motion with the aid of Computational Fluid Dynamics (CFD). The behavior of a surface combatant for varying Froude numbers and wave amplitudes modelled using RANS equations. The commercial CFD solver Simcenter Star CCM+ was utilized in computations. The solution methodology and the evaluation process of the numerical results was presented in detail. The results was investigated in terms of time varying displacements, frequency responses of the motions, dominant amplitudes, transfer functions and the free surface deformations. Furthermore, the resonance case of the ship was determined. The transfer functions obtained from CFD analyzes were compared with those of the strip theory, and the compatibility of the methods was examined.