Green Shipbuilding Manufacturing Technologies: Design Strategies, Digitalization, and Sustainable Applications

With increasing global concern over climate change and environmental sustainability, green shipbuilding technologies have emerged as a critical direction for modernizing the maritime industry.Green shipbuilding emphasizes reducing environmental impacts throughout the ship lifecycle, including design, manufacturing, operation, and dismantling.This paper presents a comprehensive discussion on green shipbuilding technologies, focusing on design strategies, digitalization, and sustainable applications.Key aspects include selecting environmentally friendly materials, energy-efficient manufacturing processes, standardized and modular design, and integrating digital and intelligent technologies.Advanced approaches, including friction stir welding, laser welding, eco-friendly coatings, digital twin technology, and additive manufacturing, are examined for their potential to reduce energy consumption, material waste, and emissions.Furthermore, international trends and applications in green shipbuilding illustrate current technological developments and future directions.The results indicate that adopting green technologies can significantly enhance resource utilization, reduce environmental impacts, and improve overall sustainability.This research identifies specific technological synergies-particularly between modular design and digital twins-that offer a scalable pathway for shipyards to meet tightening IMO GHG regulations.Efficiencies, such as a 40% reduction in fume emissions and 20-30% shorter construction cycles, detailed in Table 1, provide a data-driven foundation for ship designers and manufacturers to achieve sustainable maritime goals.