Research on sea state simulation based on fast Fourier transform method and multi-load coupling of wind, wave and current

Abstract Nowsdays, the demand for the development of marine resources such as wave energy and wind energy is steadily increasing. In order to ensure the stability of offshore facilities, it is essential to simulate and analyze the sea surface environment and hydrodynamic processes. To enhance the accuracy of simulating real sea conditions, the fast Fourier transform algorithm was utilized to analyze sea surface data within a specific area of the South Sea of China. By integrating these analysis results with actual wind and current parameters from the marine environment, a numerical model was established, and the dynamic processes of the sea surface environment under exponential gradient wind, shear flow and wave loads are studied. The results show that the simulation results of the model are in great agreement with the actual sea surface environment, primarily attributed to the meticulous consideration of wave parameters, wind speed, and current velocity in the real ocean environment. This congruence holds considerable significance for advancing research on offshore environments and fostering the exploitation of marine resources.