Full-Scale Maneuvering Trials Correction and Motion Modelling Based on Actual Sea and Weather Conditions

Area of Science:

• Naval Architecture and Marine Engineering
• Ocean Engineering
• Fluid Dynamics

Background:

• Accurate ship maneuver modeling is crucial for safe navigation.
• Environmental factors like wind, waves, and currents significantly impact ship movement.
• Existing methods often lack accuracy and verification in real-world sea conditions.

Purpose of the Study:

• To propose a novel sea trials correction method for ship maneuvering.
• To enhance the accuracy and verifiability of maneuver modeling under environmental influences.
• To establish a reliable ship maneuvering motion model based on corrected experimental data.

Main Methods:

• Calculating wind and wave drift forces from measurement data.
• Utilizing the steady turning hypothesis and pattern search algorithm to solve for environmental adjustment parameters.
• Correcting experimental track and velocity data based on calculated drift distances and velocities.
• Identifying hydrodynamic coefficients using the corrected test data.

Main Results:

• The corrected data demonstrated higher accuracy compared to raw log data.
• Complete identification of hydrodynamic coefficients was achieved.
• Prediction accuracy for advance and tactical diameters reached 93% and 97%, respectively.
• The established maneuvering model accurately predicted ship behavior.

Conclusions:

• The proposed correction method significantly improves the accuracy of ship maneuver modeling in actual sea conditions.
• The validated model meets the International Maritime Organization (IMO) standards for ship maneuverability.
• This approach provides a reliable tool for predicting ship performance during maneuvers.