Modeling and Simulation of Ship Swaying Attitude Based on Linear System Theory

At the establishment of ship swaying posture model is the core of ship motion attitude simulation research. In this paper, we use the linear system theory to deduce the transfer function of the ship motion attitude. We then establish the random wave motion model through the spectrum density function. The ship motion attitude model is established with the dip angle of the wave as input. The wave spectrum and wave dip angle of the third state waves and the fifth state waves are analyzed by simulation, and also the attitude angle of the ship at different encounter angles are analyzed to demonstrate that the method of establishing the model of ship motion attitude is credible.