A certain hybrid monohull was selected to study the influence of appendages on hydrodynamics of hybrid monohull, and a model test in towing tank was conducted for different appendage plans in this paper. By the resistance and seakeeping performance test, the influence on hydrodynamic performance of different appendages was studied, and the influencing rules were summarized. The model test results indicate that the influence on the hydrodynamics of hybrid monohull is different between the seme-submerged body, fin and stern flap, which can provide some reference for the optimization design of builtup appendages and stern flaps.

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