Research On Numerical Of Ship-shore Hydrodynamic Disturbance

With the development of economy and the improvement of the level of science and technology,ships are developing in the direction of large-scale,and the main size of ships is increasing.When large ships are navigating and berthing in many waterways and ports,the width of these waters will be relatively narrow and the water depth will be relatively narrow.It will become relatively shallow and become restricted waters.When a ship navigates in restricted waters,it will be affected by the quay wall effect.Compared with the open water area,its hydrodynamic characteristics will change significantly,and will be subjected to additional lateral forces and head turning moments.If reasonable Manipulation measures may cause collision accidents such as ship-shore collision or hull bottoming,which endangers navigation safety.Therefore,it is of great significance to study the hydrodynamic effects of ships when navigating in restricted waters.The main research contents of this paper are as follows:(1)The reliability of the numerical method used in this paper is verified.The reliability of the numerical method was verified by simulating ships sailing in open water areas and compared with the test results.Three sets of grids of different sizes were used in the numerical simulation,and the grid convergence and the convergence of the numerical results were further analyzed.(2)A numerical method based on solving the RANS equation is used to simulate the navigation of ships in restricted waters.The turbulence phenomenon is simulated by the SST model,and the free surface wave making phenomenon is simulated by the VOF method.The above method is used to simulate whether the influence of free liquid surface,viscosity,and different speeds,ship-to-shore distance,water depth,and quay wall forms are taken into account to simulate the ship’s navigation near the quay wall.(3)The influence of factors such as free liquid surface,viscosity,speed,ship-to-shore distance,water depth,and quay wall form on the hydrodynamic force of ships sailing close to the quay wall was analyzed,and the effect of the quay wall effect when the ship berthed under the above conditions was explored.Laws can provide references for ship maneuvering and channel design.(4)The potential flow theory is used to simulate the ship sailing along the bank wall,and the results of several CFD methods and potential flow are compared when the ship is at different ship-to-shore distances.The influence of ship-to-shore distance on the accuracy of several numerical methods is explored,and the same assumptions are obtained.The characteristics of the numerical methods of the next two different theories.