Study on Sensitivity of Navigation Attitude to Ship Resistance with Moonpool in Calm Water
The existence of the moonpool will aggravate the influence of the ship's pitch and heave,and then affect the ship's navigation attitude.Based on the viscous flow theory and the finite volume method,a numerical method predicting the resistance of ships with moonpools in a fixed state or free heave and pitch degrees of freedom is constructed.The difference of total resistance predicted with numerical method between two towing conditions is analyzed.A resistance test of the ship with a moonpool in calm water under free-floating conditions is carried out in the towing tank,which shows that the influence of navigation attitude can't be ignored.If the navigation attitude is not considered,the maximum difference between the numerical prediction and the model test will be 12.6％.When considering the navigation attitude,the maximum difference between the numerical prediction and the model test is 5.3％.The influence of navigation attitude on ship resistance should be considered in the prediction of ship resistance with a moonpool at medium and high speed.
calm water resistancemoonpoolnavigation attitudemodel testnumerical simulation
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