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Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Exploration and Technical Requirements for the Development of China's Polar Marine Equipment WU Gang, ZHOU Haojie, SHEN Yue, QIN Qi Ship & Boat    2024, 35 (04): 1-10.   DOI: 10.19423/j.cnki.31-1561/u.2024.04.001 Abstract （272）      PDF （2097KB）（681）       Knowledge map    Save Polar marine equipment is the main carrier for human participation in polar activities. The suggestions for the division of the polar marine equipment system are provided in the current study. The key directions for future polar marine equipment in China are found based on the historical development of China’s polar marine equipment and the comparative analysis of similar equipment types at home and abroad. Nine technical disciplines for polar ships are proposed and three major technical requirements are listed and elaborated by combining with the engineering research and development of heavy icebreakers. It can provide references for the research and development of relevant equipment technologies in China. Reference | Related Articles | Metrics Select State-of-the-Art and Prospects of Installation Methods for Offshore Wind Turbines JIN Jingzhe, GAO Zhen Ship & Boat    2024, 35 (03): 1-20.   DOI: 10.19423/j.cnki.31-1561/u.2024.03.001 Abstract （431）      PDF （6710KB）（938）       Knowledge map    Save The difficulty and cost of the installation of offshore wind turbine (OWT) increases with the rapid development of the scale of the global offshore wind industry, the continuous enlargement of the capacity of the wind turbine and the development of wind farms towards deep sea. The installation methods suitable for large wind turbines (10 MW and above) in deeper waters and harsh sea conditions shall be thoroughly studied and refined to address this situation. Therefore, this article introduces and discusses the main installation methods of OWTs and the characteristics of OWT installation vessels, as well as their future development needs. On this basis, the installation difficulties of current OWTs are summarized. The research progresses in the numerical simulation of the OWT installation are further reviewed. The scheme of combining numerical simulation with the planning and on-site construction stages of wind turbine installation is discussed in detail to ensure safe construction and improve installation efficiency. Reference | Related Articles | Metrics Select Review of Research Progress of Ship Surf-Riding/Broaching Stability FENG Peiyuan, LIU Zhen, WEI Yuefeng Ship & Boat    2024, 35 (03): 21-29.   DOI: 10.19423/j.cnki.31-1561/u.2024.03.002 Abstract （187）      PDF （2924KB）（402）       Knowledge map    Save Surf-riding/broaching is one of the five stability failure modes newly included into the Second Generation Intact Stability Criteria by the International Maritime Organization. It is considered to be the most complex one among the five failure modes due to its strong nonlinearity and chaotic characteristics, hence having high academic research value. This paper introduces the researches related to the surf-riding/broaching in recent years, elaborates the research progress of the theoretical prediction, numerical simulation, model test and specifications, as well as the research developments concerning the influence of the surf-riding/broaching on the ship design and ship operation. The key problems that have not been fully solved and the bottleneck technologies that need to be broken are analyzed based on the state-of-the-art of the ship surf-riding/broaching. It can provide references for the key research directions in the future. Reference | Related Articles | Metrics Select Technical Analysis of Liquefied Hydrogen Carrier JIN Yanzi, ZHU Zilong, DUAN Bin, LONG Chan Ship & Boat    2024, 35 (02): 1-8.   DOI: 10.19423/j.cnki.31-1561/u.2024.02.001 Abstract （288）      PDF （1557KB）（629）       Knowledge map    Save Hydrogen is the ultimate clean energy to achieve zero carbon emissions. The storage and transportation of the liquefied hydrogen at sea has the characteristics of high storage and transportation efficiency and low long-distance transportation costs, which are crucial for the promotion and use of hydrogen energy worldwide. In the transnational and transregional liquefied hydrogen trade, large-capacity liquefied hydrogen carriers are the most economical, convenient and flexible storage and transportation tools, as well as strategic marine equipment with high technical difficulty and promising market value in the future. At present, the design and construction projects of the liquefied hydrogen carrier in the world are gradually increasing. Japan, South Korea and some European countries have taken the lead in exploring the cross-border liquefied hydrogen trade, and have conducted the corresponding research on the marine liquefied hydrogen carrier. However, research on the liquefied hydrogen carrier in China is still in the conceptual design stage, and the formulation of relevant specifications and guidelines is also in the early stage. The technical development and characteristics of the overall design, the liquefied hydrogen containment system, the liquefied hydrogen cargo handling system and the power system of the liquefied hydrogen carrier are analyzed to provide technology reference and guidance for the research, development and design of the liquefied hydrogen carrier and relevant equipment. Reference | Related Articles | Metrics Select Finite-Time Trajectory Tracking Control of Surface Vehicle Based on Adding a Power Integrator Technique ZENG Daohui, CAI Chengtao Ship & Boat    2024, 35 (02): 9-18.   DOI: 10.19423/j.cnki.31-1561/u.2024.02.002 Abstract （149）      PDF （2363KB）（273）       Knowledge map    Save A finite-time trajectory tracking control scheme based on the extended state observer is proposed for surface vehicles with model parameter uncertainties and unknown time-varying disturbances. Firstly, a novel finite-time control law is proposed based on the backstepping technique and “adding a power integrator” technique. The designed controller can ensure the trajectory tracking errors of surface vehicles converge to the neighborhood around the origin within a finite time by using continuous feedback. The finite-time stability of the closed-loop control system is then strictly proved using the Lyapunov theory. Finally, the simulation results are provided to demonstrate the effectiveness of the proposed control scheme. Reference | Related Articles | Metrics Select Review of World Shipping Market in 2023 and Prospect in 2024 WEI Mei, ZHOU Yilai, GAO Jue, WANG Yingyi, PAN Fang Ship & Boat    2024, 35 (01): 1-18.   DOI: 10.19423/j.cnki.31-1561/u.2024.01.001 Abstract （529）      PDF （4676KB）（1143）       Knowledge map    Save In 2023, the global economic growth rate slowed down from 3.5% in 2022 to 3.1%, but showing significant resilience with accelerating global economic growth differentiation among different economies. With the relaxation of global epidemic control and the increase of geopolitical conflicts, the commodity trade has been disturbed, and the seaborne trade is expected to grow by 2.4% in 2023. The market fundamentals of the shipbuilding industry are stable and positive. The key market indicators maintain growth with a year-on-year increase of 25% in new ship orders and a 12% increase in completed deliveries in terms of deadweight tonnage. Among them, new orders for oil tankers increased by 356.6% year-on-year, and new orders for bulk carriers increased by 33% year-on-year, but container ships and gas carriers fell back. Among the major shipbuilding countries, China’s shipbuilding industry stays ahead with new ship orders accounting for 68% of the global market share. The orders for dual-fuel vessels using alternative fuels continue to grow, accounting for 34% of global orders. The shipbuilding industry is expected to maintain an upward trend in 2024, especially for bulk carriers and oil tankers. The acceleration of the decarbonization process and the development of artificial intelligence technology will also bring opportunities and challenges to the high-quality development of the shipping industry. Reference | Related Articles | Metrics Select On the Connotation and Classification of Smart Ships LI Lu Ship & Boat    2024, 35 (01): 19-25.   DOI: 10.19423/j.cnki.31-1561/u.2024.01.002 Abstract （280）      PDF （1749KB）（649）       Knowledge map    Save Major shipbuilding countries in the world have started the development of smart ships since the 21st century. Recently, efforts have been made to accelerate the strategic layout in the field of the smart ships. As an important industry competitive highland, the proper approach for the development of the smart ships that is suitable for the domestic shipbuilding industry can be formulated only by deeply understanding its connotation, fully recognizing its professionalism, complexity and difficulty, and clearly clarifying its development direction. The connotation of the smart ships is clarified, and the differences and difficulties of the shipbuilding industry compared with other industries are analyzed in detail. After the discussion of the necessity of the classification of the smart ships, it proposes a method and procedure for the definition of the classification of the smart ships based on the system engineering, explained further by taking the White Paper on the Development of Smart Ships as an example. Reference | Related Articles | Metrics