Numerical investigation of the effects of wave–current interaction on the dynamic responses of a floating power harvesting platform

The present study explores the effects of wave–current interaction (WCI) on the dynamic response of a floating power harvesting platform under a typically operational condition, which is composed of a semi-submersible platform, multiple point-absorber wave energy converters (WECs), and a catenary mooring system. First, a mathematical model based on the Joint North Sea Wave Project (JONSWAP) spectrum is developed to model the random wave–current interaction. After completing the hydrodynamic validation of the power harvesting platform system, time-domain simulations are employed to implement multiple loading scenarios, which consider the current direction, current velocity, and WCI. The findings demonstrate that the presence of current significantly alters the wave characteristics, leading to notable changes in the energy conversion performance of the wave farm, platform motion, and mooring line tension. This paper underscores the importance of WCI in accurately simulating the dynamic behavior of power harvesting platform and provides insights into the design of floating offshore energy systems.