| Ship maneuverability is the ship in accordance with the driver's intentions to maintain or change its speed, course and location of the performance. In severe sea conditions, because of ship maneuvering and manipulation of poor performance caused by improper driving personnel shipwreck accidents have occurred, not only casualties, but also causing large-scale pollution of the marine environment. Therefore, it is necessary to introduce a way to analysis or to predict ships in operation in sea state trajectory of the simulation. In this paper, frequency-domain ship motion based on potential flow theory, the application of time-frequency domain conversion method of ship maneuvering motion under wave action when the calendar; Based on the numerical simulation results of the delay memory of the ship damping analysis of the effective length of time selected; to introduce The concept of wave power base is presented with a project value of the ship seakeeping computer programs greatly reduce the wave disturbance force computation time, to manipulate the movement of ships in waves on the simulation gives an effective improvements. Finally, drawing on ship maneuvering and seakeeping calculation of two under the premise of knowledge to a certain type boat, for example, research ship in irregular waves under the action of a first-order wave force and second-order wave forces on the ship's navigation path and motion gestures impact. The results show that the model has good engineering value, the ship seakeeping and maneuverability study guide.
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