Numerical investigation on the dynamic response of the semi-submersible aquaculture platform in regular waves

Utilizing a numerical simulation method to investigate the hydrodynamic response of the semi-submersible aquaculture platform in waves provides guidance for the design and optimization to ensure the stability and structural safety of the aquaculture platform in the open sea. Combining diffraction theory and Morison equation, the present study focuses on the semi-submersible aquaculture platforms to investigate the influence of draught, wave period and linear elasticity coefficient on the hydrodynamic response of semi-submersible aquaculture platforms in regular waves. The findings indicate that the combined effect of draught and wave period causes two or three peaks in the mooring force and motion response of the aquaculture platform, and a valley occurs in large draught and short period conditions. Additionally, increasing the draught can effectively mitigate the mooring force and motion response of the semi-submersible aquaculture platform in large wave height conditions. As for the mooring elastic coefficient, increasing the elastic coefficient does not significantly weaken the mooring force and motion response of the aquaculture platform. Conversely, the semi-submersible aquaculture platform reaches a peak in a high elastic coefficient and minor draught, and attains a valley value in large draught conditions. Taking into account the combined impact of the two factors of draught and wave period, wave height and elastic coefficient on the dynamic response of the aquaculture platform can more comprehensively reflect the changing of the mooring force and motion response of the aquaculture platform, and provide a reference for site selection and structural optimization, which has great practical engineering significance.