Optimization of Hull Form for Chongqing-Shanghai Sea-River-Through Ships
In order to improve the navigation performance and efficiency of the Chongqing-Shanghai sea-river-through ships,a prototype that meets the draft requirements of the Three Gorges Lock is taken as the research object to optimize the hull form with the displacement volume and the longitudinal position of the center of buoyancy as the constraints and the theoretical design and numerical calculation combined.Software Rhinoceros is used for hull modeling,CAESES(FRIENDSHIP Framework)is used for semi-parametric model optimization and Computational Fluid Dynamics(CFD)technology is used for resistance prediction.The comparison of the two rounds of optimization showed that the resistance of the ship had reduced by 10.76%compared with the original ship at the speed of 10 kn;and at speeds of 13 kn and 16 kn,the resistances had decreased by 8.18%and 1.86%,respectively.The research also shows that the drag reduction effect of the combination of vertical bow with lower convex stern is better than that of the combination of sharp straight bow with straight stern,and the lower the speed is,the more obvious the drag reduction effect is.Multi-speed verification can effectively avoid the limitations of fixed speed ship form optimization,and the research results may have valuable reference for the hull form design and construction of sea-river-through ships.
hull form optimizationtotal resistancemulti-speedsea-river-through shipSBD technology
NETL
NSTL
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