A Coupled CFD-FEM Method for Computation of Ship Hydroelasticity

With the increase of the ship size, stiffness of the hull structure becomes smaller. This means that the frequency of wave excitation is closer to the natural frequency of hull vibration, making hydroelastic responses more significant. In this paper, KRISO's model experiment of a container ship is calculated based on coupled CFD-FEM method. By comparing the heave, pitch, and vertical bending moment at midship, validity of the numerical method is illustrated. Nonlinear characteristics in the interaction between the flow field and the structural deformation are investigated. At a certain ratio of the wavelength to the ship length, nonlinear strength of the wave load (characterized by the ratio of wave height to the wave length)has great influence on the amplitude of the vertical bending moment on the hull girder. © 2022, Editorial Office of Ship Building of China. All right reserved.