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Abstract Floating Photovoltaic (FPV) systems are considered a novel method to generate electricity. The semi-submersible platform which has been studied mature to exploit renewable energy in the deep sea was built for generating power by photovoltaic systems in recent years. With the development of multi-module designation and various arrangements of mooring systems, the motion response with correcting viscous damping of the semi-submersible platform and the stiffness of the mooring system in the deep sea are significant problems. This paper presents an efficient multi-module coupled hydrodynamic and structural based on the Cummins equation to study the nonlinear multi-body hydrodynamic interference of the semi-submersible platform of FPV systems. Connections between modules are modeled as linear springs with certain stiffness to release all Degrees of Freedom (DoF) of the module. Furthermore, supporting members of modules are modeled as Morison bars. The motion response with hydrodynamic interference of every module is calculated accurately and different design types of mooring systems are studied in this paper, discussing vibration behaviors in low frequency. The diverse layout scenarios are obtained by altering the spacing of the FPV system when deployed adjacent to each other as well as the configurations of the mooring systems. The results suggest that arranging the layout scenario of the mooring system to increase the global stability and the FPV system built as a rectangle with four semi-submersible modules has a lower motion response.
Tang et al. (Sun,) studied this question.
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