The ocean platforms are integral to various offshore activities such as oil exploration, renewable energy harvesting, and marine transportation. The hydrodynamic behavior of three-dimensional mooring platforms in regular waves is crucial for offshore engineering applications. Understanding their response to wave-induced forces is essential for ensuring safe and efficient operations in harsh marine environments.

In this study, the Moving Particle Semi-implicit (MPS) method is utilized to investigate the dynamic response of mooring platforms, complemented by the in-house software, MLParticle-SJTU. The open-source dynamic mooring line model MoorDyn is used to couple with our software for moorig calculation. The accuracy of the coupled model is validated by comparison with published experimental data and SPH results^[1].

After the verification, The coupled model is used to analyze the influence of mooring line stiffness on the motion characteristics of mooring platforms subjected to regular waves. Specifically, the study examines the three-degree-of-freedom (3-DOF) motion responses, considering different levels of mooring line stiffness. The findings reveal that variations in mooring line stiffness significantly affect the motion response of mooring platforms. It is observed that an increase in mooring line stiffness leads to decrease of platform motion amplitude, with notable changes in surge and heave motion.