Research On Ship-form And Hydrodynamics Of Integrated Hybrid Monohull

Integrated hybrid monohull is an new type of ship which is formed by adding the stabilizing appendage on the bottom of conventional monohull bow.The new type of ship has good longitudinal motion performance and good navigability.The stabilizing appendage consists of a semi-submerged bow and pair of first fins which is the key to has good hydrodynamic performance.In this paper,a 1500ton with round bilge model ship,installs the stabilizing appendage with the design parameters such as shape,size,installation position.Then calcuate these ship’s CFD hydrostatic resistance and the seakeeping resistance.The main contents of this thesis are as follows:(1)According to past experience information,determine the main style of the stabilizing appendage and the connection form of the hyhrid ship.The semi-submerged bow adopts NACA-00 series airfoil and bow fin adopts(?)airfoil.By changing the semi submerged bow and bow fins shapes and sizes,location,design a series of stabilizing appendage.The stabilizing appendage connect the main hull through the combination of B spline curve,forming a series of integrated hybrid monohull.(2)The CFD numerical simulation calculation is conducted for the integrated hybrid monohull.According to the calculation results,several schemes with excellent resistance performance are selected as an alternative for seakeeping calulation.(3)Considering the profile of hybrid ship have complicated structures,viscosity influences the calculation of hydrodynamic coefficients.With viscous correction to the motion prediction method of 2D slices,results are obtained for the motion prediction after correction.Comparing the results of each scheme motion prediction,choose the one with best rapidity and excellent seakeeping scheme as the final design.