Optimization Analysis Of Ship Parallel Replenishment

As for the parallel operation of two ships,the seakeeping performance of two ships in parallel can be improved by setting up a reasonable replenishment scheme.Taking the container ship as the research object and Seakeeping as the optimization index,this paper carries out numerical simulation analysis of various conditions for the optimized two-ship parallel replenishment scheme,and optimizes the two-ship parallel replenishment scheme.(1)The reason of AQWA's mesh classification and encryption is verified by the analysis of GRid-INdependent calculation.Through the mesh division,the hull's mesh is analyzed and calculated,and the related calculation results are compared.The work of this chapter provides the basis for grid generation for the later calculation of seakeeping.It shows that the grid generation method is feasible for parallel analysis and prediction of seakeeping of two ships,and lays a solid foundation for the accuracy of calculation.The reliability of single-ship navigation and two-ship parallel algorithm is verified.The parameters of single-ship navigation and two-ship parallel heave and roll can be obtained by comparative analysis.Considering the influence of hydrodynamic disturbance in two-ship parallel,the seakeeping analysis of two-ship parallel replenishment is validated.(2)The optimization of parallel replenishment schemes for two ships takes into account the reasonable arrangement under different wave directions and longitudinal spacing.Through calculation and analysis,it can be found that the rolling changes in longitudinal spacing have obvious characteristics,and increases with the increase of longitudinal spacing.At the same time,the corresponding frequencies of wave peaks are consistent,which shows that different longitudinal spacing has no effect on the appearance of wave peaks.(3)According to different speeds,different sea conditions and conditions with or without cables,it is found that with the increase of speed,the amplitude of roll changes obviously,while the amplitude of sag changes little.Under different sea conditions,with the increase of sea conditions,the amplitudes of roll and heave are increasing,and further consideration should be given to the navigational state at high sea conditions.The existence of cable can effectively increase the rolling resistance,but it has no obvious effect on the sag.