Predicting ship maneuverability through mathematical models is a common approach.Previous captive model tests were typically conducted only at design speeds,and the MMG ship maneuvering motion models often assumed that the influence of propellers on ship maneuvering hydrodynamics could be neglected.However,in the actual process of ship maneuvering,ship speed can vary significantly,and the influence of propellers on ship maneuvering hydrodynamics may become significant.Therefore,it is necessary to conduct relevant research on ship maneuvering hydrodynamics.Taking the KVLCC2 as the research object,numerical simulations of captive model tests were conducted at different speeds for the bare hull,ship-rudder,ship-propeller,and ship-propeller-rudder systems,respectively,to study the influence of propellers on ship maneuvering hydrodynamics under different speeds.The research results indicate that the influence of propellers on ship maneuvering hydrodynamics cannot be ignored,and this influence increases as the ship's speed decreases,although the presence of the rudder mitigates this effect.Propellers have a significant impact on rudder effectiveness,which becomes more pronounced as the ship's speed decreases.Therefore,when conducting ship maneuverability studies,it is necessary to conduct relevant captive model tests at off-design speeds.
captive model testpropeller influenceship maneuveringdesign speedship-propeller-rudder system
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