The hull vibration(whether the hole hull vibration or the local vibration) can bring on the discomfort of the person in the ship, affect the work of the equipment and the instrument, as well as it can bring on the alternate stress of the component, speedup the fatigue damage of the structure. Since the ship engine room and the superstructure are the working and living area, the designer should calculate the inherent specialty of the each deck in the design phase, so that the vibration frequency can be disti...