Maneuverability simulation of large container ships based on MMG under variable wind conditions

Large container ships are the main means of maritime trade transportation, and transportation safety and efficiency directly affect global economic development. The complex maritime navigation conditions make it difficult to ensure the safety and efficiency of large container ships. In order to improve the safety and transportation efficiency of large container ships sailing at sea, a Maneuvering Motion Generator (MMG) is proposed. Based on the existing four degree of freedom model, a six degree of freedom ship maneuvering motion model is constructed to simulate and analyze the sea maneuvering of large container ships. The results showed that the constructed model accurately simulated the changes in pitch angle and roll angle during ship navigation, and the error between roll angle and pitch angle did not exceed 0.2°. When the relative wind direction was 120°, and the wind speed was 13m/s, wind interference had the greatest impact on ship navigation. At this time, the lateral deviation was more than 120m, and the heading deviation angle was more than 4°. When the wind speed was 16m/s, the influence of wind interference on the ship's heading was significantly reduced after the ship's steering, and the deviation angle reduced from 0.3° to almost no effect. The designed simulation model for large ship maneuvering compensates for the lack of upper and lower wave states in ship maneuvering simulation, accurately simulating the sea motion state of large ships. This result helps operators make optimal decisions in strong winds and other disruptive environments, improving the safety and efficiency of large ships navigating at sea.