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Research on the Construction Technology of YJQZ Offshore WindPower Foundation Steel Pipe Pile Sinking ZHAO Kaiqiang, ZHENG Jiang, SUN Yuliang, XIE Weimin, LIU Guosheng Ocean Engineering Equipment and Technology    2025, 12 (1): 127-132.   DOI: 10.12087/oeet.2095-7297.2025.01.17 Abstract （874）      PDF（pc） （2232KB）（165）       Knowledge map    Save As an important construction process in offshore wind farms， the construction of foundation steel pipe piles is difficult and requires high standards. This article aims to study the construction technology of steel pipe pile sinking for offshore wind power foundation， so as to improve construction efficiency and reduce construction costs. In-depth exploration and research were conducted on the key points of pile sinking construction technology， including measures to tackle difficult points and the construction process of foundation steel pipe piles. The research results show that using the Haili formula during the YC130 hydraulic hammer hammering process can greatly reduce the errors caused by manually determining parameters during pile sinking. According to the force analysis of steel pipe pile lifting engineering， lifting should be carried out during the appropriate window period to meet the requirements of lifting power coefficient. Optimizing the design of the foundation steel pipe pile and adopting advanced construction technology can significantly improve construction efficiency and reduce construction costs. The research results of this article provide useful technical guidance and theoretical support for the construction of offshore wind power foundation steel pipe piles， and lay the foundation for subsequent related research. Related Articles | Metrics | Comments（0）

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Semi-Floating Construction Operation Method of Offshore Wind Power Jack-Up Installation Vessel ZHANG Jianxiang1, LI Shifei1, TANG Yong2, ZHANG Xiaodong2, ZHANG Mingming2 Ocean Engineering Equipment and Technology    2025, 12 (1): 53-60.   DOI: 10.12087/oeet.2095-7297.2025.01.07 Abstract （842）      PDF（pc） （5061KB）（145）       Knowledge map    Save With the development of global wind power industry， offshore wind power is gradually expanding into deep sea areas， where traditional jack-up platforms are at risk of being phased out due to their inability to operate in deep water and soft muddy seabed environments. The semi-floating construction method combines the advantages of jack-up platforms and floating platforms， significantly expands the operational depth of jack-up platforms， allows them to continue efficient and safe operations in deep water areas and solves the problem of traditional platforms of inability to work in soft muddy seabed environments. The significance of this technology lies in extending the service life of existing jack-up platforms， avoiding their rapid retirement， and achieving “half a generation later retirement”. Through case studies of offshore wind farms in the coastal areas of Zhejiang Province， a detailed discussion of the principles， key technical steps， and actual engineering applications of semi-floating construction technology is provided， a technical comparison between the semi-floating construction method and traditional construction methods is given， and significant advantages of this technology in improving construction efficiency， reducing costs， and ensuring safety are demonstrated. Finally， this paper looks forward to the broad application prospects of semi-floating construction technology in offshore wind power and other marine engineering. Related Articles | Metrics | Comments（0）

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Innovation Trajectory and Trends in Offshore Wind Power Transmission： An Integrated Analysis of Bibliometrics and Patent Life Cycle LIAO Peng1, HUANG Xin2, LIAO Xinzheng2 Ocean Engineering Equipment and Technology    2025, 12 (1): 141-152.   DOI: 10.12087/oeet.2095-7297.2025.01.19 Abstract （663）      PDF（pc） （12324KB）（108）       Knowledge map    Save As a key support for global energy transition， offshore wind power transmission technology plays a crucial role in industrial upgrading and energy security. Based on bibliometric and patent analysis methods， this study systematically examines the technological evolution characteristics in this field from 2000 to 2023. The research reveals that the field has shown exponential growth， with Chinese scholars leading in publication volume but still needing to enhance academic impact. Countries around the North Sea， leveraging their regional collaborative advantages， maintain leadership in core technologies such as high-voltage direct current (HVDC) transmission. Keyword and patent cluster analysis demonstrates a parallel innovation pattern of traditional technology advancement and emerging technology breakthroughs， with rapid rise in new topics such as energy storage and hydrogen production. Technology maturity analysis indicates that the field is in its growth phase （k≈0.3） and is expected to enter maturity by 2026， with flexible DC transmission and smart grid integration becoming competitive focuses in the next decade. The findings provide decision-making reference for grasping technological development directions and optimizing innovation layout. Related Articles | Metrics | Comments（0）

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Safety Management of Work at Height in Offshore Engineering Manufacturing Industry LUO Mengran, WANG Qinggong, YU Minggan Ocean Engineering Equipment and Technology    2025, 12 (3): 79-86.   DOI: 10.12087/oeet.2095-7297.2025.03.10 Abstract （640）      PDF（pc） （9952KB）（126）       Knowledge map    Save Due to the specific manufacturing processes in offshore engineering， work at height is highly prevalent， particularly during the assembly phases of large structures such as modules and jackets， where the frequency of work at height and multi-level crossover operations， as well as the potential fall height， are continuously increasing. This paper provides a classified review of current domestic and international research on work-at-height safety. It systematically examines the definition and identification criteria of work at height and proposes comprehensive preventive measures based on domestic and international regulatory standards and engineering practices. These measures encompass multiple aspects， including engineering technology， management， personnel， and physical protection. To ensure the inherent safety of scaffolding， the paper discusses different types of scaffolding and their selection during construction， aiming to provide a safety management framework for work at height in the offshore engineering manufacturing industry. This framework is designed to effectively reduce accident rates and ensure operational safety. Related Articles | Metrics | Comments（0）

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Optimization of the Crude Oil Cooler for “Hai Yang Shi You 123” FPSO WENG Xi, TAN Jingxuan, ZHOU Yong, ZHANG Wei Ocean Engineering Equipment and Technology    2025, 12 (2): 136-139.   DOI: 10.12087/oeet.2095-7297.2025.02.29 Abstract （466）      PDF（pc） （6199KB）（99）       Knowledge map    Save The “Hai Yang Shi You 123”FPSO crude oil cooler is a plate heat exchange, which normally operates with one in use and one as backup. As the oil production in the oilfield gradually increases， the load on the crude oil cooler gradually increases， resulting in poor heat exchange efficiency. Through physical property analysis of oilfield crude oil， the main reason for the poor heat exchange effect of the cooler is that the crude oil has a high wax content， a high wax precipitation point， and severe wax deposition on the side plate wall of the crude oil， which reduces the heat exchange capacity between the crude oil and seawater. To efficiently solve this problem， a comprehensive analysis was conducted on the equipment structure and process status of the crude oil cooler. A creative idea was proposed to optimize the two coolers into series operation， the application effect of the cooler series connection was verified on site， providing a reference for the stable operation of FPSO in the future. Related Articles | Metrics | Comments（0）

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Research on the Identification of Technological Opportunities in Marine New Materials in China LIU Hongyu, WU Dajian Ocean Engineering Equipment and Technology    2025, 12 (3): 123-127.   DOI: 10.12087/oeet.2095-7297.2025.03.16 Abstract （443）      PDF（pc） （4127KB）（118）       Knowledge map    Save This study explores technological opportunities in China's marine new materials field based on patent mining. Patent data were analyzed across trends， authorization， regions， and lifecycle， and keyword clustering was used to identify hotspots. Results show the field is transitioning from growth to maturity， focusing on composites， molding， and green materials， with future directions in intelligent and multifunctional systems. Strategic suggestions are proposed to guide innovation and planning. Related Articles | Metrics | Comments（0）

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Finite Element Analysis and Monitoring Scheme Design for the MCM of a Submerged Turret Production Single-Point Mooring System LIU Yixiang, LI Peng, LIU Jiannan, WANG Kun, SHI Hemu Ocean Engineering Equipment and Technology    2025, 12 (2): 120-126.   DOI: 10.12087/oeet.2095-7297.2025.02.26 Abstract （441）      PDF（pc） （10412KB）（102）       Knowledge map    Save The submerged turret production (STP) single-point mooring system operates in an environment subjected to the combined effects of mooring forces， wind， waves， and currents. Through contact with structures such as the buoyancy and mating cone module (MCM)， it transfers the impact of these loads to the hull. Under the prolonged influence of alternating loads， the MCM is prone to fatigue issues at positions where structural stress is concentrated， potentially leading to crack initiation; under extreme wind and wave conditions， there may even be a failure of structural ultimate strength， rendering the floating production storage offloading (FPSO) unable to operate normally. Therefore， developing a design for a multi-parameter monitoring and early warning system that is safe， reliable， and stable for the STP single-point system is crucial for ensuring the normal， steady， and secure operation of the FPSO. This paper focuses on the MCM of a certain FPSO， conducting structural finite element analysis to calculate the stress distribution state of the MCM structure under working conditions， identifying high-stress locations in critical areas， and providing recommendations for sensor placement schemes. This lays the groundwork for developing a monitoring and early warning system for the STP single point and arranging stress sensors. Related Articles | Metrics | Comments（0）

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Introduction to Ship Model Making： Taking Type 903A Composite Supply Ship as an Example XIE Yifan, ZHANG Shutian, GUO Sihang, LIANG Zhenjie, ZHANG Yining, ZHANG Dapeng Ocean Engineering Equipment and Technology    2025, 12 (1): 19-27.   DOI: 10.12087/oeet.2095-7297.2025.01.03 Abstract （435）      PDF（pc） （14008KB）（123）       Knowledge map    Save Cultivating marine engineering talents is crucial to advancing the vision of building a strong maritime nation. Ship modelling plays an essential role in marine engineering education by bridging theoretical knowledge and practical application. This paper aims to popularize and promote the foundational concepts of marine engineering and the techniques of ship model construction. Using the 903A; composite supply ship as a case study， the paper provides a detailed walkthrough of the model making process， including 3D design and physical construction. The insights presented are valuable for enhancing the accessibility and understanding of marine engineering concepts， contributing to the discipline's broader dissemination and educational impact. Related Articles | Metrics | Comments（0）

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Review on the Development and Research on Magnetic Flux Leakage Detection Technology LI Bailin Ocean Engineering Equipment and Technology    2025, 12 (2): 179-182.   DOI: 10.12087/oeet.2095-7297.2025.02.37 Abstract （432）      PDF（pc） （1490KB）（246）       Knowledge map    Save Magnetic flux leakage (MFL) detection technology， renowned for its high reliability and non-contact detection capabilities， is widely applied in safety detections of petrochemical storage tanks and pipelines. Firstly， the theoretical development and technical principles of MFL detection are introduced. Then， the research status of defect identification， quantitative analysis， and inversion methodologies in MFL technology are explained in detail. Finally， a summary is provided， highlighting the challenges faced by current artificial intelligent methods in this field. Related Articles | Metrics | Comments（0）

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Analyzing the Key Techniques and Safety Measures for Steel Structure Hoisting in Construction Engineering ZHOU Zhenyong, LIU Yiqiang Ocean Engineering Equipment and Technology    2025, 12 (2): 107-110.   DOI: 10.12087/oeet.2095-7297.2025.02.23 Abstract （386）      PDF（pc） （2067KB）（101）       Knowledge map    Save The quality of steel structure construction and the overall stability of these structures are crucial for ensuring the safe and efficient progression of construction projects， given the significant role that steel structures play in such undertakings. To enhance the efficacy of various technologies employed during the lifting operations of steel structures within buildings， it is imperative to adopt appropriate techniques. This approach will help uphold rigorous standards concerning both the quality of lifting procedures and structural integrity. Furthermore， it is essential to implement robust measures that strengthen safety protocols during steel structure lifting activities in construction projects， effectively manage potential safety risks associated with these operations， and ultimately facilitate a secure and rational advancement of practices related to steel structure lifting. Related Articles | Metrics | Comments（0）

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Fault Analysis of Low Outlet Pressure and Reduced Speed during Slag Discharge of Lube Oil Separator WENG Fei, ZHOU Yong, SHI Yabo, ZHOU Chuxiong Ocean Engineering Equipment and Technology    2025, 12 (2): 140-143.   DOI: 10.12087/oeet.2095-7297.2025.02.30 Abstract （344）      PDF（pc） （2089KB）（94）       Knowledge map    Save As a key equipment for lube oil filtration in large diesel units of offshore facilities， the main function of the lube oil separator is to separate the lube oil used in the fuel oil unit. Through centrifugal separation， the impurities and moisture inside the lube oil are removed， ensuring the quality of the lube oil and avoiding damage to the operation of the fuel oil unit due to lube oil deterioration. At the same time， the service life of the equipment is improved， the frequency of lube oil replacement is reduced， and the economic benefits are improved. In order to reduce the frequent shutdown of the lube oil separator due to speed reduced during slag discharge and low outlet pressure， the cause of the fault is analyzed and a solution is proposed， providing a reference basis for equipment fault handling. Related Articles | Metrics | Comments（0）

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Introduction to Ship Model Making：Taking the Adora Magic City Cruise as an Example ZHAO Guanyixuan, ZHANG Shutian, XIE Kexin, LI Yuting, LI Jiaqiang, LI Chengwei, ZHANG Dapeng Ocean Engineering Equipment and Technology    2025, 12 (1): 1-8.   DOI: 10.12087/oeet.2095-7297.2025.01.01 Abstract （344）      PDF（pc） （7656KB）（235）       Knowledge map    Save Since the 18th CPC National Congress， China has made historic achievements in the development of the marine cause， but there are still some gaps compared with the world's maritime powers. The construction of a marine talent team is a key link in building a strong maritime nation. Cultivating marine talents with an international outlook， an innovative spirit and practical ability is an inevitable requirement for building a strong maritime nation. Modelling， as a practical activity integrating science， technology and art， plays a unique role in the training of marine-related talents. By making models of ships and marine platforms， makers are able to intuitively understand the structural principles， design concepts and construction processes of marine equipment， thus cultivating spatial imagination， practical operational ability and engineering thinking. In this article， we will take the production of the model of Adora Magic City; cruise ship as an example， introduce the model production process， and provide science and technology related to ship modeling， simultaneously popularizing knowledge related to ship models. Related Articles | Metrics | Comments（0）

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Feasibility Analysis of Layered Water Injection Assisting Flow in Thin Interbedded Oil Fields of Strong Water Bodies CHEN Xueli, WANG Li, ZHANG Ruigang Ocean Engineering Equipment and Technology    2025, 12 (2): 117-119.   DOI: 10.12087/oeet.2095-7297.2025.02.25 Abstract （341）      PDF（pc） （1877KB）（99）       Knowledge map    Save Water injection in offshore thin interbedded oil fields is a great challenge because of its high cost and difficulty in construction. Through long-term research and practice， separated layer self-source enclosed water injection technology is put forward to supplement energy. Based on the characteristics of offshore oil fields， the screening principles of target layer， water source layer and pilot water injection well group are formulated. We developed self-source enclosed injection pipe string and underground data monitoring system， such as measuring and adjusting， water quality monitoring， etc.， and has the huge advantages of multi-purpose in one well， low cost， green energy saving and quick effect. This technology can reduce costs related to drilling， platform facilities and surface water injection facilities， and effectively reduce water corrosion and reservoir damage. It has a wide range of reference and promotion significance in similar thin interbedded water injection oilfields offshore. Related Articles | Metrics | Comments（0）

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Economic Analysis of Green Hydrogen and Its Derivatives Production Technology Based on Offshore Wind Power SHEN Qi, LIU Chao, LI Ouping, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 94-101.   DOI: 10.12087/oeet.2095-7297.2025.03.12 Abstract （338）      PDF（pc） （3148KB）（118）       Knowledge map    Save As the global energy structure transforms and the “dual-carbon” goals are set， green hydrogen is gaining importance as a clean energy source in the petroleum refining industry. This study comprehensively assesses the technical and economic viability of producing green hydrogen， methanol， and ammonia using offshore wind power. By calculating the costs of hydrogen production， methanol synthesis， and ammonia synthesis under varying electricity costs， the study analyzes how electricity prices affect the economic viability of green hydrogen and its derivatives. The results indicate that when the electricity cost is 0.35 yuan per unit， the current alkaline electrolysis hydrogen production technology yields a hydrogen cost of 24.66 yuan/kg in the scenario of offshore wind power and onshore hydrogen production， with methanol and ammonia production costs of 5457.55 yuan/ton and 4999.43 yuan/ton， respectively. The study emphasizes that electricity cost is the key factor influencing economic viability. Reducing renewable energy electricity costs and enhancing electrolysis efficiency are crucial for boosting the competitiveness of green hydrogen and its derivatives. Finally， the article proposes suggestions for the coordinated development of policies， technologies， and industries to promote the industrialization of green hydrogen and its derivatives. Related Articles | Metrics | Comments（0）

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Research on the Efficiency and Stability of the Filter Element in Natural Gas Lubricating Oil Aggregation Separators ZHANG Guodong Ocean Engineering Equipment and Technology    2025, 12 (2): 96-101.   DOI: 10.12087/oeet.2095-7297.2025.02.21 Abstract （337）      PDF（pc） （4110KB）（90）       Knowledge map    Save Based on the on-site actual design and operation data of the post installed lubricating oil coalescence separation system of natural gas compressors in offshore gas fields. The filtration performance of the filter element in the coalescence separation system under the same aerosol dust generation conditions is studied， and the influence of operating variables such as temperature， gas volume， and aerosol concentration on the stability of the filter element filtration performance is examined. The experimental results show that the larger the air filtration capacity of the filter element， the less affected the concentration and temperature on the filtration efficiency， and the better the stability of the filtration efficiency. When the amount of filtered gas remains constant， the lower the temperature， the less affected the change in aerosol concentration on the filtration efficiency， and the more stable the operation; The higher the aerosol concentration， the less affected the temperature change on the filtration efficiency， and the more stable the operation. This article can provide references for the operation control and optimization of coalescence filters in actual production of gas fields. Related Articles | Metrics | Comments（0）

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Safety Management Analysis of Mobile Oil Production Platform XIA Wang, JIANG Chunqi, WU Bin, QIU Shuang Ocean Engineering Equipment and Technology    2025, 12 (2): 17-20.   DOI: 10.12087/oeet.2095-7297.2025.02.04 Abstract （327）      PDF（pc） （935KB）（92）       Knowledge map    Save Based on the analysis of the operational mode and management regulations of the first mobile oil platform in China， combined with the characteristics of its export operation， this paper analyzes the regulatory feasibility of the platform according to the fixed platform from the aspects of maritime supervision focus， platform characteristics， oil spill pollution sources and related technical standards， policies and regulations. Although the platform has certain technical characteristics of “ship”， it is not for the purpose of maritime transportation， and its own moving characteristics are not obvious， and its transport operation is similar to that of fixed platform. Therefore， during the normal operation of the platform， under the premise of meeting the existing policies and regulations， the use of appropriate on-site safeguard measures can be supervised and managed according to the fixed platform， that is， it will be more reasonable and efficient to manage according to the two different states of the mobile platform (production and towing). Related Articles | Metrics | Comments（0）

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Design and Construction of Aircraft Carrier Teaching Experimental Platform Based on the Fujian Ship ZHANG Shutian, XIE Yifan, GUO Sihang, LIANG Zhenjie, ZHANG Yining, ZHANG Dapeng Ocean Engineering Equipment and Technology    2025, 12 (1): 9-18.   DOI: 10.12087/oeet.2095-7297.2025.01.02 Abstract （311）      PDF（pc） （8170KB）（127）       Knowledge map    Save The construction of small-scale aircraft carrier models is an engineering project that is totally complex yet locally simple. The completed model should possess structural and hydrodynamic performance characteristics similar to those of a real aircraft carrier， which poses significant challenges to undergraduate-level designers and builders. This project takes the Chinese Navy’s Type 003 aircraft carrier， the Fujian ship， as the prototype to design and construct an aircraft carrier teaching experimental platform. The scale ratio between the model ship and the actual vessel is approximately 1∶144. This work is of great significance for the popularization of science in ocean engineering. Related Articles | Metrics | Comments（0）

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Design and Fabrication of a Compact Brushed Electromagnetic Catapult Based on Halbach Array ZHANG Shutian, GUO Sixing, LI Jiaqiang, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 22-29.   DOI: 10.12087/oeet.2095-7297.2025.03.03 Abstract （309）      PDF（pc） （7220KB）（128）       Knowledge map    Save A compact brushed electromagnetic catapult was designed and fabricated， with focused analysis on its operational principle， structural design， and performance parameters. By investigating the electromagnetic driving characteristics of the catapult system， the key factors influencing launch efficiency are explored. Additionally， the advantages of the system in high-precision control and energy conversion efficiency are experimentally validated. The results demonstrate that the proposed electromagnetic catapult exhibits rapid response speed， high reliability， and ease of maintenance. This work provides a reference for the miniaturized design of future electromagnetic catapult systems. Related Articles | Metrics | Comments（0）

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Latest Progress and Perspective in Analysis Technologies of Floatover Installation System QIN Licheng, LIANG Xuexian, FANG Xukai, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 83-95.   DOI: 10.12087/oeet.2095-7297.2025.04.12 Abstract （301）      PDF（pc） （8149KB）（58）       Knowledge map    Save With the rapid development of offshore engineering technology， offshore platforms are developing towards large-scale and integrated， which also puts forward higher requirements for offshore installation technology， and floatover installation technology also comes into being under this background. It is of great significance for the design and implementation of offshore platform installation to carry out sufficient research on the floatover system. This paper introduces the numerical and experimental modeling and analysis of the floatover system， including the hydrodynamic analysis， the modeling of the load buffer device， and the research of the nonstationary nonlinear multi-body system. Some views on future development trends are also provided. Related Articles | Metrics | Comments（0）

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Mapping the Research Frontiers of Global Marine Engineering (2015-2024): A Journal-Based Knowledge Graph Approach PAN Fei, WANG Xiaolong, CAI Yunze, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 132-144.   DOI: 10.12087/oeet.2095-7297.2025.03.18 Abstract （287）      PDF（pc） （3336KB）（149）       Knowledge map    Save Ocean engineering serves as a cornerstone for maritime power strategies and global sustainable development. To systematically reveal the research landscape, innovation entities, and frontier evolution in global ocean engineering, this study conducts an in-depth analysis of 37889 publications from 2015 to 2024 based on the Web of Science Core Collection, employing bibliometric methods and knowledge graph analysis. The findings demonstrate: ① A fundamental shift in the global research center of gravity has occurred, with China emerging as the world's primary innovation contributor across key indicators including publication volume and citation impact—its annual publication share surged from 20.9% in 2015 to 60.1% in 2024; ② Innovation entities exhibit highly clustered characteristics, with leading Chinese universities such as Harbin Engineering University and Shanghai Jiao Tong University monopolizing the top 10 global institutional rankings, forming world-class “academic highlands”; ③ Through keyword co-occurrence and cluster analysis, seven frontier themes were identified, including marine renewable energy development, intelligent autonomous marine systems, highfidelity multi-physics simulation, and marine environmental sensing and data science, revealing that the field is being profoundly reshaped by trends of “intelligentization” “decarbonization” and “high-fidelity modeling”; ④ The journal influence landscape has been restructured, with the Chinese-hosted Journal of Ocean Engineering and Science achieving the highest impact factor (11.8) in the field, though platforms for global dissemination of top-tier research require further expansion. Finally, this study establishes a framework for modern ocean engineering frontiers centered on “sustainable & intelligent ocean engineering” supported by “three foundational pillars” and driven by “four enabling engines”. The research reveals China's historic transition from “follower” to “leader” in ocean engineering, provides researchers with a clear developmental roadmap, and profoundly elucidates the strategic urgency of building world-class scientific journals to secure academic discourse power and enhance national scientific soft power. Related Articles | Metrics | Comments（0）