Abstract
Abstract. According to analyze the identity of ocean wave, the theory of wave energy spectrum was used to compute the wave elevation in some sea state. Based on establishing ship motion equations, the strip theory of the ship was used to simulate ship motion in different situation. The result showed the change of significant wave height badly influenced the amplitude of the ship motion, but it light influenced the periods of the ship motion. The change of degree of abaft the beam badly influenced the amplitude and periods of pitch, it mainly influenced periods of heave and amplitude of roll. The change of ship speed influenced the amplitude and periods of pitch, it mainly influenced periods of heave and roll.
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