At present, the offshore wind turbine in China is developing rapidly, and the application of artificial intelligence technology in the field of offshore wind turbine is the current research hotspot. This paper analyzes and summarizes the application of various artificial intelligence technologies in the dynamic response analysis, operation and maintenance monitoring, design, operation and maintenance optimization of offshore wind turbines in multiple directions, involving dynamic response forecasting, power forecasting, structural monitoring, fault diagnosis, control optimization, operation and maintenance optimization. The results show that AI technology can better cope with the challenges in the field of offshore wind turbine design and operation and maintenance. Finally, the application prospects of AI technology in the area of offshore wind turbines and several major constraints currently exist are discussed, and the future development direction is envisioned.

The equipment on weather deck of polar ships, especially high polar-ice-class icebreakers, should withstand extremely low design service temperatures. The steering gear and bow thrusters should also consider the additional requirements for ice loading. The input requirements for the equipment design are analyzed from the rules of main outfitting equipment such as the lifesaving equipment, deck machinery and manoeuvring devices. The equipment configuration and location of the high polar-ice-class ships that were delivered at home and abroad are analyzed to provide references for the localization of main outfitting equipment in the future.

The high-power nonlinear load of the marine electric propulsion system will generate significant harmonic currents and cause grid voltage waveform distortion. The Electrical Transient Analyzer Program (ETAP) is used to establish the simulation model of the electric propulsion system of a survey ship, and perform the harmonic analysis and calculation. The simulation results show that the total harmonic distortion rates of the voltage are all within the specified range for the ship under various typical operating conditions. It can provide references for the harmonic processing of similar ships in the future.