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Due to polluted environments, limited resources, and restricted space in coastal aquaculture, the use of a large-scale aquaculture platform in deep-sea areas has become more important in fish farming. However, the environment in the deep sea is complex and harsh, which threatens the safety of the fish farm platform due to extreme weather. In this work, we developed a new semi-submersible vessel-shaped truss fish farm platform with single-point mooring, considering different operating conditions. The dynamic performance of the platform was analyzed numerically. Firstly, a numerical model of the fish farm platform was created. A physical model test was then executed to verify the numerical model. The results from the numerical model were found to be in good agreement with the experimental results. Subsequently, the dynamic response of the platform under different wave conditions was analyzed based on the validated numerical model. The results showed that the new semi-submersible vessel-shaped fish farm platform had good adaptability to extreme sea conditions. The experimental and numerical analyses of the hydrodynamic responses of the fish farm platform facilitated the design, analysis, and application of the large deep-sea fish farm platform.

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