Analysis Of Wave Interference Force Based On Slice Method And Simulation Of Ship Motion

The ship is an important tool for ocean-going and marine military development However,due to the interference of complex factors such as waves,sea breezes and so on,the ship will inevitably produce various swaying at sea,which has a very detrimental effect on the stability of the ship's voyage,the comfort of the ship and the operation of the ship.It is therefore important to explore the role of the waves in the ship and to study the performance of the ship at sea.This paper firstly introduces the movement rule,characteristic parameters and the way of expression of ocean waves,then long wave peak random wave mathematical model is established.And the principle of the slice method is used to analyze the wave disturbance and disturbance torque of the ship.The six-degree-of-freedom interference and disturbance torque of the ship are obtained by the waves,and the numerical simulation is carried out by using Matlab.The degree of freedom of the waves affected by the change of time.Then the disturbance force and interference torque of the ship are substituted into the coupled six-degree-of-freedom motion differential equation,and the differential equation is solved by the Runge-Kutta method,and the ship 's roll angle,pitch angle and heave are obtained.Using Matlab for numerical simulation.And simulates the pitch,roll and sink of the ship under different heading speeds.Then,in order to reduce the computational complexity,simplify the model,improve the simulation speed,regardless of the coupling between the various degrees of freedom,the ship in the direction of movement as an independent movement,the ship in the waves to establish the movement of the uncoupled second-And the numerical simulation of Matlab is carried out to obtain the vertical and horizontal roll and sink of the ship under different heading angles.The simulation results are compared with the simulation results of the coupled six-degree-of-freedom differential equations,and the correctness of the uncoupled differential model and the fastness of the solution are verified.Finally,the virtual ocean environment grid model conforming to the law of wave motion is constructed by using Visual C ++ and OpenGL mixed programming method,and the ship movement model is introduced to find the vertical,rolling and sinking movement of the ship on the waves.A dynamic simulation of the ship in different sea conditions of the swing movement.