Research On The Maneuverability And Stability Of Enhanced Polar Navigation Ships In Ice Areas

The Arctic ice area is mainly the Arctic Ocean and its coastline.In the near future as the global climate continues to get warmer,the Arctic shipping lanes will open up due to the melting of snow and ice,and its important economic and strategic values are immeasurable.However,both economic activities and scientific research activities in the Arctic region cannot be carried out without strengthened ships in the ice area.Therefore,it is urgent to analyze the maneuverability and stability of the polar navigation of the ice area strengthening ships,and how to accurately and quickly solve the ship maneuverability forecast has become an urgent problem to be solved.In order to analyze the maneuverability and stability of the enhanced ship in the ice area,this paper determines the solid coordinate system and the dynamic coordinate system with the ship,combines the basic concepts and theories of maneuverability and stability,and deduces the equations of motion for the ship’s maneuverability in the conventional open water area.In the solution of the key hydrodynamic derivatives,the main hull and the attached rudder are calculated separately and analyzed comprehensively by combining the wing theory,Jones formula and other relevant empirical theories and formulas,and the formula for solving the ice load is derived by using empirical formulas and empirical algorithms,which is substituted into the slewing maneuverability equation for theoretical maneuverability prediction.Meanwhile,this paper applies 3D modeling software and CFD simulation software to build a detailed real ship model with a scale ratio of 1:1 according to the design line diagram of a ship under construction in the ice area for CFD simulation,and adopts a difficult overlapping mesh iterative calculation method for the full-scale model to complete the complex simulation of eight groups of different rudder angles and different sea conditions.At the same time,a large number of visualized scenes,plotted curves and data results from the simulation were compared and analyzed in detail,which verified the conjecture of ice ship interaction mode and laid the foundation for the subsequent study of maneuvering problems such as ship slewing motion.