High Precision Prediction of Vibration Comfort for Ultra-large Cruise Ship
The finite element fluid-structure coupling vibration model of the ultra-large cruise ship was established based on Abaqus soft,and a number of dynamic loadings were applied on the model caused by the equipment's running.The method based on vibration transfer path analysis was used to carry out refined prediction and evaluation of vibration comfort of the ship.The vibration response characteristics produced by large-scale equipment source are analyzed statistically,and the vibration contribution of different equipment is compared quantitatively,and the vibration transmission characteristics under the excitation of main engine and propeller pulsation pressure are analyzed systematically.The numerical results show that the vibration and pulsation pressure excitation of the main engine and propeller are the most important factors affecting the vibration comfort of the cruise ship.What's more,the fan of the air conditioning system and the ventilation system have a great influence on the vibration of the cabin near the equipment,which can not be ignored.In addition to the main engine and pulsation pressure,this paper focuses on the influence of the excitation of large auxiliary engines in the engine room and equipment near the upper cabin on the vibration response of the whole ship,which improves the accuracy of vibration comfort prediction of the whole ship,and are meaningful to the further application in engineering.Derived conclusions can also provide critical support for the following ship construction and the vibration and noise control.
ultra-large cruise shipfinite element analysistransfer path analysisvibration comforthigh-precision prediction
NETL
NSTL
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