Simulation Studies on Dynamic Characters of Floating Cranes

When the floating cranes carry out replenishment at sea,the decrease and swing of hoisting rope as well as the forced vibration of hull will easily crash the deck and cause vital accidents.Considering the elastic force at the hoisting point,dynamic equation of cargo system of the floating crane was established.With the method of numerical analysis in MATLAB,the dynamic characteristics in stillness and operation were studied.The results indicate that the length of ropes,sea conditions and decreasing speed make important impact on safety replenishment.The speed and displacement regulation of hoists obtained can provide the great basis for the heave compensation system.