Numerical simulation of ship hydroelastic responses in short-crested irregular waves

Abstract

In this paper a two-way CFD-FEM fluid-structure coupled method is developed to simulate ship motions and wave load responses in short-crested irregular waves. First, a segmented ship model is established in FEM solver, and a numerical tank is established in CFD solver to reproduce short-crested irregular waves. Then, the simulation of 3D irregular waves is illustrated, and the time series of simulated waves and the estimated directional spectra are analyzed. The simulation results of ship motions and sectional loads in 3D waves are illustrated and analyzed. The asymmetric motions and loads for ship with and without forward speed are comprehensively analyzed and cross-spectral method is used for correlation analysis between different signals. This paper has potential application values in the prediction of ship seakeeping and hydroelastic responses in realistic sea states.