Numerical simulation on ships maneuverability in shallow water

Hydrodynamic coefficients are corrected for shallow water,and shallow water maneuverability equations are established by using MMG ship maneuverability equations.The equations are computed by using fourth-order Runge-Kutta method.MATLAB language is adopted to make calculation program,Simulation processing is given for Three Gorges Project fleet of ships of shallow water navigation by using MATLAB software.The accuracy of shallow water maneuverability equations are verified by comparing the simulation result with the experimental results in literatures.Turning ability and shipping-direction stability of fleet in shallow water are simulated,the effect of shallow water is studied.It is found that constant turning circle diameter of flee increases with the same rudder angle in shallow water,the drift angle decreases with the same turning circle diameter.Z shape motion performance of fleet for shallow water is forecasted,the simulated K,T are in agreement with experimental data.The shipping-direction stability of shallow water increases compared to deep water.