Most Down Articles

Published in last 1 year| In last 2 years| In last 3 years| All| Most Downloaded in Recent Month | Most Downloaded in Recent Year|

Published in last 1 year

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

Select

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 （325）      PDF（pc） （3336KB）（690）       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）

Select

Jacket Horizontal Non-Skidway Construction and SPMT Loadout Technology LI Bing Ocean Engineering Equipment and Technology    2025, 12 (4): 32-37.   DOI: 10.12087/oeet.2095-7297.2025.04.04 Abstract （229）      PDF（pc） （8901KB）（547）       Knowledge map    Save The non-skidway construction of jackets and self-propelled modular transporter (SPMT) loadout technology has features such as not occupying skidway resources, not requiring sliding equipment, a fast loadout speed, requiring less prefabricated process equipment, and the ability to reuse it. Compared to conventional construction methods, this technology has better economic advantages and can increase the production capacity of the construction site for jackets. Currently, there are no relevant engineering cases for reference in China. In this regard, taking a hundred-meter jacket project that uses this technology as an example, the critical techniques of this engineering case are systematically introduced from aspects such as process equipment design, foundation settlement prevention, and SPMT loadout plan design. This case can provide certain technical support for the subsequent application of this technology in China. Related Articles | Metrics | Comments（0）

Select

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 （378）      PDF（pc） （8149KB）（436）       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）

Select

Fatigue Life Analysis of Steep-Waveform Flexible Riser with Full Coupling FENG Meng, Liu Xinghua, YANG Shuai, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 133-140.   DOI: 10.12087/oeet.2095-7297.2025.04.17 Abstract （246）      PDF（pc） （6251KB）（387）       Knowledge map    Save During the long-term service of flexible risers， problems such as permeation in the annular layer and interlayer friction may occur. Under alternating loads， the fatigue damage of the tensile armor wire will accelerate. This paper conducts a safety assessment for steep-waveform flexible risers. By establishing a global-local-failure finite element model that takes into account interlayer friction and corrosion effects， the dynamic response and fatigue life of the flexible risers under the full coupling model are mainly studied. The results show that both interlayer friction and corrosion effects will affect the in-service life of the flexible risers. Interlayer friction mainly increases the stress amplitude of the tensile armor wire， while the corrosion effect not only reduces the cross-sectional size but also requires the selection of the corresponding S-N curve due to the presence of the corrosive environment. The corrosion effect has a greater impact on the fatigue life. Therefore， when conducting in-service riser assessment， interlayer friction and corrosion fatigue issues should be fully considered， and effective measures should be taken to manage the integrity of the flexible risers. Related Articles | Metrics | Comments（0）

Select

Design of Ship Model Resistance Experiment Platform SHI Kunpeng, ZHENG Yuxing, TIAN Yutao, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 1-10.   DOI: 10.12087/oeet.2095-7297.2025.03.01 Abstract （247）      PDF（pc） （3698KB）（359）       Knowledge map    Save The study of hull resistance is of great significance to the dynamic characteristics of the hull. Currently， there are more than ten large and small towing tank experimental platforms in China. For undergraduate students majoring in marine engineering， studying the resistance characteristics of the hull is of great importance to their professional knowledge learning. However， the construction cost of towing tanks is too high and cannot provide a good platform for undergraduate students to use. An easy-to-implement experimentalplatform construction plan， covering modelship building, platform design and resistance-accuracy verification， offers valuable learning and experimental experience for undergraduates. Related Articles | Metrics | Comments（0）

Select

Vertical-lay Technology and Application for Ultra-Deep Water Flexible Flowline WANG Zhifeng, XUE Dazhi, FU Wenzhi, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 30-38.   DOI: 10.12087/oeet.2095-7297.2025.03.04 Abstract （212）      PDF（pc） （10497KB）（356）       Knowledge map    Save Flexible flowline is an important part of offshore oil and gas development， and its offshore installation is the core ability and key technology of offshore engineering companies. Based on China's first self-developed 1500m ultra-deep water Lingshui 17-2 gas field， and the domestic first 3000m-class deep-water MSV “Hai yang Shi You 286”， the installation feasibility of 1500m water depth flexible flowline by vertical-lay method for “HYSY 286” is evaluated. The key technology and solution of vertical-lay of ultra-deep water flexible flowline are studied. Through the engineering application in Lingshui 17-2 gas field， the feasibility of the relevant technology is verified， and the gap in domestic technology field is filled， and the technical reserve and experience are provided for the installation of deep water flexible flowline in the future. Related Articles | Metrics | Comments（0）

Select

Discussion on Regular Inspection Technologies for Submarine Pipelines SU Tianshui, LIAO Hengjie, HUANG Panyang Ocean Engineering Equipment and Technology    2025, 12 (3): 118-122.   DOI: 10.12087/oeet.2095-7297.2025.03.15 Abstract （287）      PDF（pc） （5619KB）（351）       Knowledge map    Save Subsea pipelines are critical infrastructure for transporting offshore oil， gas， and other resources， and their safety is vital to the marine economy and environment. This paper provides an overview of the construction and inspection status of subsea pipelines along the coast of Zhejiang Province， with a focus on external pipeline inspection technologies and methods. Taking the key area of Huibieyang in Zhejiang as an example， it analyzes and highlights that pipeline inspection should be tailored to different marine environments. Related Articles | Metrics | Comments（0）

Select

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 （361）      PDF（pc） （7220KB）（344）       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）

Select

Simulation and Experimental Study on Yawing Motion Characteristic for Single-Anchor Mooring Ships CHEN Pengyu, ZHU Yiming, XIE Xiaomin Ocean Engineering Equipment and Technology    2025, 12 (3): 87-93.   DOI: 10.12087/oeet.2095-7297.2025.03.11 Abstract （234）      PDF（pc） （6276KB）（340）       Knowledge map    Save The numerical simulation and model test study is conducted on yawing motion characteristic for the 40000 DWT bulk carrier under the combined conditions of wind， wave and current cases. This research analyzed the response of yawing motion and maximum cable tension of anchor chains. Sea condition and length of anchor chains could have influence on them. The test results can provide important technical reference for the safety mooring of single anchored ships. Related Articles | Metrics | Comments（0）

Select

Energy Management Strategy of Diesel-Electric Hybrid Power System Based on Rule Optimization CHEN Pengfei, WANG Zhuang, CHEN Li Ocean Engineering Equipment and Technology    2026, 13 (1): 24-33.   DOI: 10.12087/oeet.2095-7297.2026.01.04 Abstract （0）      PDF（pc） （6214KB）（336）       Knowledge map    Save To reduce ship fuel consumption， an optimized rule-based energy management strategy is proposed to improve the energy efficiency of diesel-electric hybrid power system. The model of the diesel-electric hybrid power system is established based on reverse energy flow， and a rule-based energy management strategy is designed. With the goal of minimizing fuel consumption， a genetic algorithm is employed to optimize the threshold parameters of the rule-based strategy. Case study results of a small polar cruise ship on an Antarctic route show that the proposed method reduces fuel consumption by 3.13% compared to the non-optimized energy management strategy. By appropriately setting the threshold parameters in the rule-based energy management strategy， the fuel consumption of diesel engines can be effectively controlled. The reduction in fuel consumption is achieved by enhancing the battery's ability to “peaks shaving and valley filling”. Related Articles | Metrics | Comments（0）

Select

Research on Installation Technology of Composite Cables for Newly Constructed Deepwater Jackets WANG Minfeng, WEI Xumin, XU Long, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 51-57.   DOI: 10.12087/oeet.2095-7297.2025.03.06 Abstract （286）      PDF（pc） （11076KB）（335）       Knowledge map    Save Offshore pile foundation fixed oil platforms are the main structural form of offshore oil production in China. At present， the tension type external current cathodic protection technology has become the main technical means of cathodic protection for offshore pile foundation fixed jacket platforms. The newly built jacket platform adopts the method of installing a tensioned composite cable electrode system on land， but facing the design height of 338 meters of jacket， it is a huge challenge to install a composite cable about 340 meters long and weighing about 3.5 tons during its horizontal construction process， and there are no relevant research results or industry experience to draw on. In order to solve this problem， this article proposes a static sliding cable composite cable installation method for installation testing. Based on mechanical calculations and 3D simulation， video monitoring， and dynamic monitoring of the actual process of the composite cable， the actual monitoring data is comprehensively compared with theoretical calculation data and onsite test data. The focus is on studying the stress state of the steel wire rope sliding cable and traction steel wire rope during the installation process of the composite cable， the local deflection and overall deflection of the composite cable， and the change law of the composite cable motion posture during the installation process， to verify the feasibility of the impressed current cathodic protection （ICCP） composite cable sliding cable installation scheme for deepwater horizontal jackets. Related Articles | Metrics | Comments（0）

Select

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 （371）      PDF（pc） （3148KB）（328）       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）

Select

Study on the Internal Detection Method of a Platform Riser in the South China Sea CAO Juhang, YU Yuanfang, ZHANG Jie, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 58-66.   DOI: 10.12087/oeet.2095-7297.2025.03.07 Abstract （177）      PDF（pc） （8592KB）（326）       Knowledge map    Save Based on the background of the internal inspection project of a 12.75-inch production riser on a South China Sea platform， the standards and specifications for pipeline internal inspection were systematically organized. The inspection objectives， methods， precision， and parameters for evaluating the remaining strength of corrosion were established. Using ultrasonic internal inspection equipment， a comparative analysis was conducted between the conventional in-line inspection method based on water driving and the pulling through method. It was found that the operation time of the pulling through method was only 23% of that of the water driving method. Based on the preliminary assessment of internal cleanliness and corrosion conditions obtained through pipeline CCTV system， the ultrasonic pulling through internal inspection solution was employed to conduct wall thickness testing and corrosion evaluation of the offshore riser， identifying defect information where corrosion depth exceeded 10% of the wall thickness. According to the corrosion evaluation index of ASME 31G， the estimated repair factor of the riser defect location was obtained， and a riser repair plan was formulated， providing a reference for subsequent similar inspections. Related Articles | Metrics | Comments（0）

Select

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 （699）      PDF（pc） （9952KB）（324）       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）

Select

Mechanical Characteristics of Deepwater Riserless Mud Return Line Under Internal Flow Induced Excitation YIN Zhiming, LI Zhong, WU Di, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 39-50.   DOI: 10.12087/oeet.2095-7297.2025.03.05 Abstract （253）      PDF（pc） （7734KB）（323）       Knowledge map    Save The mud return line is the key equipment of deepwater riserless drilling system. It is filled with high flow velocity mud， and the mechanical characteristics of mud on the line are not clear. The mechanical model of the mud return line under the combined action of internal and external flow was established by using the microelement method， considering the internal flow inertia force， friction force， centrifugal force and Coriolis force. The numerical model was established by using the finite element method， and the solver developed by Newmark-β method and MATLAB. The single effect and the combined effect of the internal flow force are analyzed， and the influence of mud flow rate， mud density and other factors on the internal flow mechanical characteristics is also studied. The result shows that the inertia force increases the vibration amplitude of the return line， riction decreases the lateral displacement of the return line， centrifugal force and Coriolis force increase the lateral displacement of the return line. The internal flow force has great influence on the return line， and the friction force has the greatest influence on the mud return line. The effects of inertia force， Coriolis force and centrifugal force are small. The effect of internal mud on the return line should be considered in the actual engineering analysis. Related Articles | Metrics | Comments（0）

Select

Exhibition of Modern Model Making Technology Based on the Model Making of 093 Nuclear Submarine SHOU Hai, TIAN Yutao, ZHANG Shutian, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 11-21.   DOI: 10.12087/oeet.2095-7297.2025.03.02 Abstract （316）      PDF（pc） （6851KB）（320）       Knowledge map    Save Taking the 093 model production as a starting point, this paper conducts an in-depth analysis of modern model making technologies. Through a detailed elaboration of the production process of 093 nuclear submarine model， including precise digital design using 3D modeling software in the early stage to determine the accurate proportion， suitable size and select appropriate materials， the use of 3D printing technology for rapid prototyping and fine model manufacturing， and the later processing procedures such as surface cleaning， polishing and coating protection， the characteristics and advantages of modern model-making techniques in digitalization， automation， material application and fine processing are comprehensively demonstrated. At the same time， the key role of this technology in improving the efficiency of model production， enhancing the reducibility and precision of models， as well as its application prospects and development trends in the field of model making are discussed， providing a useful reference for in-depth understanding of modern model-making techniques. Related Articles | Metrics | Comments（0）

Select

Structural Design of an Offshore Floating Base under a Modular Concept ZHANG Shutian, CHEN Zehan, TIAN Yutao, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 18-31.   DOI: 10.12087/oeet.2095-7297.2025.04.03 Abstract （281）      PDF（pc） （6327KB）（316）       Knowledge map    Save To address the issues—high construction costs, limited flexibility, and difficulty in meeting the maintenance demands of large naval vessels such as aircraft carriers—associated with traditional ultra-large floating docks, this paper proposes a modular, self-propelled, multi-functional offshore floating-base structure based on the concept of very large floating structures (VLFS). This platform consists of multiple small floating dock modules, each equipped with its own lifting, self-propulsion and dynamic-positioning systems. These modules can be flexibly combined according to mission requirements to form an ultra-large floating operation platform with comprehensive support capabilities. This paper elaborates on its overall architecture, buoyancy design, power configuration, ship guidance system, and structural connection scheme. Furthermore, its structural safety and operational feasibility are validated by means of hydroelastic-response analysis and transverse-strength assessment. This design provides an important reference for the future engineering implementation and educational application of mobile offshore bases. Related Articles | Metrics | Comments（0）

Select

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 （494）      PDF（pc） （4127KB）（313）       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）

Select

Application of an Energy-Aware A* and APF Hybrid Algorithm in Collision Avoidance Path Planning for Autonomous Buoys WANG Bo, WANG Lei, JIANG Weidong Ocean Engineering Equipment and Technology    2025, 12 (3): 102-111.   DOI: 10.12087/oeet.2095-7297.2025.03.13 Abstract （201）      PDF（pc） （14390KB）（312）       Knowledge map    Save The emergence and development of mobile aids to navigation （MAtoN） have a promoting effect on the progress of maritime science and technology. As a type of MAtoN， autonomous buoys have great development prospects. However， due to energy constraints， autonomous buoys must minimize energy consumption as much as possible during navigation to extend their working cycle. Therefore， a path planning algorithm that can be more energy-efficient is needed. This paper proposes a hybrid algorithm of energy-aware A* and artificial potential field （APF）. The global path planning of autonomous buoys is carried out by using the energy-aware A* algorithm. Based on the traditional A* algorithm， the energy perception ability is added， an energy consumption model is established， then a route with lower energy consumption is planned， and a time costiten is introduced to control the navigation time of the autonomous buoy. The APF algorithm is added for local motion planning to locally control the motion path of the autonomous buoy and avoid collisions. This paper verifies the superiority of the energy-aware A* algorithm through simulation. By introducing the APF algorithm， a hybrid planning algorithm is formed， achieving real-time collision avoidance planning for autonomous buoys. Most of the existing A*-APF hybrid algorithms are designed for robots， unmanned surface vehicles， etc.， and are not suitable for the actual path planning of autonomous buoys with strong energy limitations. In contrast， this hybrid algorithm emphasizes energy-aware ability and is more suitable for application in the actual path planning of autonomous buoys. The application of this algorithm in the design of autonomous buoys can promote the development of autonomous buoy applications and has positive significance for enhancing maritime scientific and technological strength. Related Articles | Metrics | Comments（0）

Select

Research on Key Technologies of Offshore Construction for Mooring Systems of Floating Wind Turbines CHEN Wei, WANG Zhizhou, WU Hehe Ocean Engineering Equipment and Technology    2025, 12 (4): 124-132.   DOI: 10.12087/oeet.2095-7297.2025.04.16 Abstract （213）      PDF（pc） （13568KB）（310）       Knowledge map    Save This paper conducts research on the offshore construction of floating wind turbine mooring systems， identifies key issues in the construction process， addresses offshore construction challenges， ensures safe and efficient installation， achieves high-quality deployment， and provides technical references for domestic floating wind power projects. Focus on the four key issues of precise penetration of suction anchors， accurate laying of anchor chains， rapid reconnection of floating bodies， and precise tensioning of moorings， conduct comprehensive process research， formulate construction plans relying on full-slewing crane ships， and make detailed technical preparations. The precise penetration of the suction anchors was achieved， and the anchor chains were laid along the route without torsion. Finally， the position of the floating body， draft depth， and anchor chain tension all met the design requirements， and the mooring system operated stably. The construction technology formed by the research can ensure the offshore construction of floating wind turbines， save project costs， and improve the domestic floating wind power construction. Related Articles | Metrics | Comments（0）

Select

Analysis of the Influence of Vibration-Blocking Mass on Vibration Transmission Performance of Marine Auxiliary Machinery MAO Liang, SHOU Jianlin, LIU Xuchen Ocean Engineering Equipment and Technology    2025, 12 (3): 128-131.   DOI: 10.12087/oeet.2095-7297.2025.03.17 Abstract （196）      PDF（pc） （3729KB）（299）       Knowledge map    Save Adding a blocking mass between the base web and the deck surface is an effective means to curb the transmission of ship auxiliary machinery vibration to the hull structure. This study aims to investigate the vibration transmission of auxiliary pumps， focusing on the blocking mass as the research object. The finite element method was employed to systematically analyze the influence of parameters such as the geometric characteristics， material properties， and structural configuration of the blocking mass on the vibration transmission of marine auxiliary machinery. Simulation results demonstrated that increasing the size of the blocking mass and adopting a rational configuration can both significantly reduce vibration transmission. Considering the requirement for lightweight design， a novel squareframe-shaped blocking mass structure is proposed. Related Articles | Metrics | Comments（0）

Select

Design of Optical Fiber Communication System for Subsea Production System Based on Ring Topology ZHANG Yan, SUN Qin Ocean Engineering Equipment and Technology    2025, 12 (3): 67-72.   DOI: 10.12087/oeet.2095-7297.2025.03.08 Abstract （247）      PDF（pc） （3580KB）（298）       Knowledge map    Save An optical fiber communication system based on ring topology is proposed for the development of subsea oil and gas fields reconnecting to the existing facilities with limited resources reserved fiber cores， which is based on the efficient utilization rate of optical fiber resources and the superior scalability of topology based on ring topology， and only 4-core fibers are needed for a single loop， which can effectively solve the problem of limited optical fiber resources， and the system has superior expansion ability. Then， the scheme design of the system is carried out， and the standards and methods of the communication verification and practical application case are given， Finally， based on the characteristics of different projects of the subsea production system， the applicability of the star topology and the ring topology is analyzed， which provides a reference for the communication scheme design of the subsea production system. Related Articles | Metrics | Comments（0）

Select

Analysis of Cable Tension and Cable Shape of Emergency Buoy Rescue System for Manned Submersible XING Dan, QU Wenxin, HU Zhonghui, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 38-43.   DOI: 10.12087/oeet.2095-7297.2025.04.05 Abstract （244）      PDF（pc） （1490KB）（297）       Knowledge map    Save When a manned submersible fails to surface in an emergency, the emergency buoy acts as the final safeguard, establishing a connection between the submersible and the rescue vessel on the surface, providing both position indication and a tow line for subsequent rescue operations. The rationality and effectiveness of the emergency buoy design are particularly critical. In this paper, a mathematical model of the cable of emergency buoy rescue system is established, and the cable shape and tension distribution of the emergency buoy rescue system of manned submersible under different working conditions are calculated and analyzed. The variation patterns of cable shape and tension are obtained for different deployment depths of the emergency buoy, different net buoyancies, and different cable diameters. This study can provide a reference for the design of manned submersibles. Related Articles | Metrics | Comments（0）

Select

APS Migration Studies in Large Marine Structures LI Wenwu, LIU Xiuhong, QIAN Peng, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 73-78.   DOI: 10.12087/oeet.2095-7297.2025.03.09 Abstract （274）      PDF（pc） （8709KB）（293）       Knowledge map    Save To address the bottleneck issues of high skidway resource occupancy and poor project scheduling flexibility in traditional skidway traction methods for 10000-ton-class deepwater oil and gas platform modules， this study introduces the mature skidway-free air pad sliding （APS） transportation technology from the shipbuilding industry. Based on application practices in South Korean shipyards， a technical solution integrating air-cushion suspension and hydraulic propulsion systems was systematically developed. By incorporating multi-stage hydraulic jacking devices and path control systems， millimeter-level precision transportation of modules weighing up to 30000 tons was achieved. Engineering validation demonstrated that the APS system reduced skidway resource requirements by 100%， improved project scheduling flexibility by 60%， and shortened transportation cycles by 40%. This research represents the first successful adaptation of APS technology to the offshore engineering sector， establishing a comprehensive skidway-free construction and transportation methodology. The findings provide an innovative solution for China's deepwater oil and gas equipment construction， effectively overcoming the rigid dependence on skidway resources for ultra-large structure transportation. Related Articles | Metrics | Comments（0）

Select

Study on RSV Ethane Liquefaction Process for Preventing CO2 Freezing and Plugging SU Tianshui, SHEN Peng, JI Aoqi, et al Ocean Engineering Equipment and Technology    2025, 12 (3): 112-117.   DOI: 10.12087/oeet.2095-7297.2025.03.14 Abstract （247）      PDF（pc） （4249KB）（292）       Knowledge map    Save A natural gas processing plant with a capacity of 6×106m3/d plans to adopt the recycle split-vapor （RSV） process to recover liquefied ethane. CO2 freezing and plugging in the demethane tower is a key technical bottleneck affecting the stable operation. With the goal of improving the ethane yield， according to the selection of liquefied ethane process for natural gas production and the formation mechanism of CO2 freeze blockage， the CO2 distribution and temperature of each tower plate of each tower plate under different CO2 contents were simulated. Through the simulation curve comparison analysis， the conclusion was concluded that when the CO2 content of the raw gas in the cold box was less than 5×10-5， the demethanizer would not freeze blockage. According to the analysis of different decarbonization processes， the alcohol amine method is selected to remove CO2 to meet the process requirements. The research results show that by using PZ+MDEA solution to remove CO2 from raw natural gas， the problem of freezing and blocking of CO2 in the deep cold zone between -90℃ and -105℃ can be effectively solved， and the ethane yield can reach more than 95%. Related Articles | Metrics | Comments（0）

Select

Introduction to Military Model Making: Taking the Type 05 Amphibious Armored Assault Vehicle as an Example GUO Sixing, LI Yuting, LI Jiaqiang, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 1-9.   DOI: 10.12087/oeet.2095-7297.2025.04.01 Abstract （281）      PDF（pc） （4871KB）（284）       Knowledge map    Save By documenting the entire process of building a scale model of the 05 amphibious assault vehicle—from information gathering and 3D modeling to final fabrication—this project illustrates the distinctive value of military modeling in naval and military-engineering education. It seeks to spark students' interest in ocean engineering and, ultimately, to cultivate the interdisciplinary talent required by China's national strategy of strengthening the country through human capital development. The work also serves as an important popularscience resource for military engineering education. Related Articles | Metrics | Comments（0）

Select

Research on Offshore Installation Technology of Suction Bucket Jacket Wind Turbine Foundation CHEN Wei, WANG Tezheng, WANG Zhizhou, et al Ocean Engineering Equipment and Technology    2026, 13 (1): 116-122.   DOI: 10.12087/oeet.2095-7297.2026.01.14 Abstract （0）      PDF（pc） （8011KB）（280）       Knowledge map    Save For wind power development in the shallow-overburden offshore area of Dalian， the suction bucket jacket foundation form is adopted， and the suction bucket offshore construction in special sea areas is sorted out and analyzed. Through the implementation of the project， research has been conducted on the key issues of the installation of suction bucket jacket wind turbine foundations in shallow water areas. Key issues such as the feasibility analysis of suction bucket construction penetration， construction measurement control， and negative pressure sinking and penetration are analyzed and studied one by one， forming replicable construction technology. Through the actual offshore construction of the target wind turbine position， the installation process is elaborated in detail， the technical analysis methods and results are evaluated， and the implementation measures for the construction technical characteristics and control requirements are described， providing a technical reference for offshore installation of similar wind-turbine foundations. Related Articles | Metrics | Comments（0）

Select

Naval Battle Model Production: A Conceptual Naval Battle Model Based on Aircraft Carrier Formations GUO Sixing, SHOU Hai, CHEN Zehan, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 10-17.   DOI: 10.12087/oeet.2095-7297.2025.04.02 Abstract （284）      PDF（pc） （5239KB）（275）       Knowledge map    Save Against the backdrop of the evolving international situation and the continuous enhancement of naval combat capabilities, this project takes hypothetical future naval battles as a blueprint to design, fabricate, and demonstrate a scaled-down model of a partial naval battle scenario. This paper aims to demonstrate China's growing naval equipment capabilities and its future combat processes by creating scaled-down partial naval battle models and supporting wargames. This initiative is designed to popularize knowledge about the combat processes of aircraft carrier battle groups among students and strengthen patriotic education. Related Articles | Metrics | Comments（0）

Select

Commissioning and Application of Jacket Pile Gripper System for Offshore Wind Power Project BI Hangming Ocean Engineering Equipment and Technology    2025, 12 (4): 44-48.   DOI: 10.12087/oeet.2095-7297.2025.04.06 Abstract （238）      PDF（pc） （1096KB）（272）       Knowledge map    Save With the comprehensive green transformation of economic and social development and the pursuit of China's “dual carbon” targets， offshore wind power project development is gaining momentum and playing an increasingly important role and finding wide application in the global energy transition. Taking a European offshore wind power jacket foundation project as an example， this paper presents the commissioning process of the jacket pile gripper， highlights the differences in gripper commissioning between offshore wind and offshore oil and gas projects， describes the associated test equipment and materials， and summarizes key operational precautions， thus providing a useful reference for similar offshore wind developments. Related Articles | Metrics | Comments（0）

Select

Research and Application of Emergency Pressure Recharging Technology for ROV in Subsea Production System ZOU Jianwen Ocean Engineering Equipment and Technology    2025, 12 (4): 55-63.   DOI: 10.12087/oeet.2095-7297.2025.04.08 Abstract （216）      PDF（pc） （7800KB）（271）       Knowledge map    Save This paper addresses the abnormal pressure drop in the low-pressure loop chemical injection of a subsea production system in the South China Sea by proposing and implementing a comprehensive emergency pressure recharging solution for the first time. Through systematic solution selection， stabplate modification， and the design of a dedicated pressure recharging device， combined with validated onshore simulation test， the offshore emergency pressure recharging operation was successfully completed. Practice demonstrates that this emergency pressure recharging solution effectively maintains system pressure stability， avoids the risk of automatic wellhead shutdown， and ensures the safe and continuous operation of the subsea production system. This study not only resolves a practical engineering issue but also provides valuable technical methods and practical experience for handling similar pressure abnormal in subsea production systems， and is of great significance for ensuring the reliability and safety of subsea production systems. Related Articles | Metrics | Comments（0）

Select

Study on the Stability of Riprap Protection at Pile Foundations in Uniform Flow QIN Yaling, YANG Xinzhu, CHEN Xiaohui, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 116-123.   DOI: 10.12087/oeet.2095-7297.2025.04.15 Abstract （213）      PDF（pc） （2997KB）（270）       Knowledge map    Save Riprap protection is regarded as one of the most widely used methods for erosion protection of hydraulic foundations such as bridge piers in water. To accurately predict the scouring depth at the pile foundation after the implementation of riprap protection not only provides a calculation tool for the riprap amount for pile foundation maintenance engineering design， but also provides a means for the safety assessment of pile foundation for riprap protection design. This article experimentally explores the variation characteristics of the maximum scouring depth in the riprap layer at the pile with factors such as pile diameter， riprap particle size， flow depth， and approach flow velocity， respectively. The flume experiments show that in order to improve the stability of the riprap layer， the thickness of the riprap layer should beat least as large as the bedform height， and the range of the riprap layer should be at least larger than 5 times the pile diameter to avoid bedform destroy. Under these conditions， the larger the size of the riprap， the better the protective effect would be， and the larger the pile diameter， the greater the scour depth would be. Finally， a formula for calculating the maximum scouring depth after riprap protection is proposed， which would provide reference for future engineering design for riprap protection. Related Articles | Metrics | Comments（0）

Select

Key Nodes in the System Commissioning of Offshore Oil Platforms ZHANG Chun Ocean Engineering Equipment and Technology    2025, 12 (4): 96-103.   DOI: 10.12087/oeet.2095-7297.2025.04.13 Abstract （303）      PDF（pc） （2452KB）（269）       Knowledge map    Save The commissioning of an offshore oil and gas production platform system is a critical task preceding mechanical completion of both onshore fabrication and offshore installation. The thoroughness and outcomes of the commissioning work will have a direct impact on the safe operation of the oil and gas fields. This article primarily addresses the preparatory work and overarching principles prior to system commissioning， alongside the key tasks that require focused attention during the commissioning phase. The primary framework encompasses platform power transmission and reception， crude oil generator commissioning， EMS (emergency management system) commissioning， central control logic testing， and the commissioning of water circulation and other utility systems. These cover areas such as power， process， utilities， and instrumentation controls. It provides a detailed elaboration on the pre-commissioning activities pertinent to conventional offshore oil and gas production platforms， the main elements of the commissioning process， and the objective of employing commissioning to promote construction progress and quality， thereby ensuring the seamless completion of the commissioning work. Related Articles | Metrics | Comments（0）

Select

Standard Comparison between Mechanical Gauging and Pressure Testing for Subsea Pipelines CAO Juhang, ZHANG Jie, LI Jian, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 64-71.   DOI: 10.12087/oeet.2095-7297.2025.04.09 Abstract （239）      PDF（pc） （2741KB）（266）       Knowledge map    Save Given the significant importance of mechanical gauging and pressure testing for submarine pipelines in offshore pipeline construction， this study focuses on reviewing the requirements for mechanical gauging and system pressure testing as outlined in the ASME， API， and DNV standards. By explaining the principles of submarine pipeline mechanical gauging， the calculation methods for gauge-plate diameters under different standards are analyzed. Based on the principles of pipeline pressure testing， it is clarified that test pressure and holding time are the two critical parameters in pipeline pressure testing. The magnitude of the test pressure depends on the size of the defects that need to be detected during the test. The duration of holding time is influenced by multiple factors， including the size of leaks， pipeline volume， and pipeline diameter. Although ASME， API， and DNV share similar general principles for submarine pipeline pressure testing， differences exist in the selection of test pressure and holding time， which necessitates an analysis of their applicability in engineering practice. Related Articles | Metrics | Comments（0）

Select

Feasibility Study on the Application of Free-Fall Lifeboats on Cylindrical FPSO MA Huihao, TIAN Feng, LV Jinbo, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 72-76.   DOI: 10.12087/oeet.2095-7297.2025.04.10 Abstract （223）      PDF（pc） （1887KB）（266）       Knowledge map    Save A preliminary selection of the lifeboat type was made based on design specifications， the environmental conditions of the Liuhua oil and gas field project and the specific parameters of the cylindrical floating production storage offloading（FPSO) and lifeboat device were introduced. The motion of the lifeboat during the release process was analyzed， and based on the application of lifeboats on SEVAN cylindrical FPSO， it was demonstrated that the application of free-fall lifeboats on Liuhua's cylindrical FPSO is feasible. Related Articles | Metrics | Comments（0）

Select

Safety Assessment of Large Structures Hoisting and Unloading from Vessels NI Pinghu, CHEN Silin, FAN Xiangbin, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 77-82.   DOI: 10.12087/oeet.2095-7297.2025.04.11 Abstract （228）      PDF（pc） （4300KB）（266）       Knowledge map    Save With the development of the offshore construction industry， many 100-ton large structures need to be transported to the assembly site by sea. In the unloading and transfer process， the barge is affected by the wind， waves， and currents， which will produce six-degree-of-freedom motion， so that the suspended load moves relative to the ground， causing the suspended load to sway， which affects the crane operation， resulting in operational inefficiencies and a series of potential safety hazards. In this paper， for hoisting and unloading of large structures， numerical simulation is used to analyze the barge movement and the dynamic characteristics of the lifting process， to assess in advance the safety of the operating envelope and sling forces throughout the operation， and to propose countermeasures for the main safety risks， in order to provide reference for the construction of subsequent similar projects. Related Articles | Metrics | Comments（0）

Select

Experimental Study on the Dynamic Response Characteristics of Buoys in Floating Wind Turbine Mooring Systems under Current Loads LI Xiaoyong, ZHANG Hang, JI Weidong, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 49-54.   DOI: 10.12087/oeet.2095-7297.2025.04.07 Abstract （252）      PDF（pc） （3766KB）（261）       Knowledge map    Save The mooring system of floating offshore wind power structures is a key component ensuring their long-term stable operation. In recent years， to enhance mooring performance and reduce construction and maintenance costs， optimized mooring system designs incorporating auxiliary buoys have attracted widespread attention. Based on a comprehensive review of related studies both domestically and internationally， this paper focuses on the dynamic response characteristics of buoys under ocean current effects. A series of current-induced load experiments were conducted in a circulating water channel using a 1∶25 scale buoy model. The pitch angle of the buoy and the mooring line tension were measured under different current velocities， and the variation law of the current load coefficient with current velocity was analyzed. The experimental results indicate that the buoy exhibits significant current-induced vibrations at high current speeds. The mooring tension shows a continuous increase in the horizontal direction， while in the vertical direction， the tension demonstrates non-monotonic variation due to vibration effects. The obtained dimensionless current load coefficient ranges from 1.056 to 1.538. These results provide essential parameters for the design of buoys in floating wind turbine mooring systems， thereby improving their safety and cost-effectiveness. Related Articles | Metrics | Comments（0）

Select

Study on Oil Flushing Process and Method Optimization WANG Ziyang, WANG Xiaohua, GUO Chongxiao, et al Ocean Engineering Equipment and Technology    2025, 12 (4): 104-115.   DOI: 10.12087/oeet.2095-7297.2025.04.14 Abstract （255）      PDF（pc） （4786KB）（247）       Knowledge map    Save In the offshore engineering construction， the cleanliness of equipment and instrumentation pipelines plays a vital role in the safe and long-lasting operation of production platforms. Oil flushing as an efficient pipeline cleaning method， the existing studies have focused on analyzing the oil-flushing process itself， while paying little attention to improving flushing efficiency or optimizing the methodology. In this manuscript， the oil flushing equipment， construction process， factors affecting oil flushing efficiency are studied. Then the characteristics of series and parallel flushing methods are compared. Finally， an oil flushing device that can be used in multiple parallel flushing is proposed， and numerical simulation of the oil flow characteristics in the device is carried out based on ANSYS Fluent. According to the results of the simulation， three optimized forms of single column structure， symmetric structure and staggered structure are proposed， and the flow distribution characteristics of the three optimized structures are compared with those of the original structure. The research results show that the flow distribution consistency of the oil in the form of symmetric structure is the highest， and its four branch flow basically meets the flow requirement of 43.73L/min， which can realize multiple parallel flushing. Related Articles | Metrics | Comments（0）

Select

Security Design on Envelope Surface of Ship-to-Ship Transfer System CHENG Yiwei, WANG Jian, CUI Tengfei, et al Ocean Engineering Equipment and Technology    2026, 13 (1): 101-106.   DOI: 10.12087/oeet.2095-7297.2026.01.12 Abstract （0）      PDF（pc） （2017KB）（246）       Knowledge map    Save The ship-to-ship transfer system using hoses has great advantages because it can effectively deal with the changing distance between vessels. Affected by ocean currents or other factors， the distance between the vessels may increase， which leads to flexible hose being damaged or even broken. To prevent this， the vessel separation detection should be set to monitor the distance between vessels and trigger an alarm when accidents happen. By analyzing the influence of the vessel's movement such as drift between vessels， a calculation method for the safety envelope surface of the ship-to-ship transfer system was proposed. Based on the parameters of a 14000m3 LNG bunkering vessel， the ESD1 and ESD2 alarm distance were calculated as 9.5m and 17m， respectively. The RELATIVE deviations from the corresponding parameters of 9.3m and 16.8m in foreign systems are 2.1% and 1.2%， respectively. It fully proves that this calculation method can provide guideline for the parameter ESD1 alarm setting of vessel separation detection， so as to improve the safety of ship bunkering process. Related Articles | Metrics | Comments（0）

Select

Research on Testing， Evaluation， Verification and Validation (TEVV) Technology for Digital Twin Systems of Offshore Facilities TANG Aipan, XU Junxiao, LING Aijun, et al Ocean Engineering Equipment and Technology    2026, 13 (1): 123-128.   DOI: 10.12087/oeet.2095-7297.2026.01.15 Abstract （0）      PDF（pc） （2486KB）（230）       Knowledge map    Save As a revolutionary tool， digital twin technology enables the creation of dynamic virtual replicas of physical assets， processes， or systems， allowing for precise modeling and simulation of complex systems in various fields. With the continuous deepening of its applications， digital twin technology is gradually becoming a crucial support for key decision-making processes. The digital twin system technology for offshore facilities exhibits distinct characteristics due to factors such as the complexity of the marine environment， the high-risk nature of offshore facilities， and the requirements for managing offshore facilities throughout their lifecycle. This study systematically outlines the characteristics of the digital twin system for offshore facilities， summarizes the primary focus areas for testing， evaluation， verification， and validation (TEVV) of these systems， and proposes a suitable TEVV technical framework. This provides a systematic solution for ensuring the quality of digital twin systems for offshore facilities. Related Articles | Metrics | Comments（0）

Select

A Conceptual Design for the Bionic Anglerfish Underwater Substance Detection and Collection Robot CHEN Zehan, ZHOU Zhengxun, ZHANG Shutian, et al Ocean Engineering Equipment and Technology    2026, 13 (1): 1-9.   DOI: 10.12087/oeet.2095-7297.2026.01.01 Abstract （0）      PDF（pc） （6465KB）（217）       Knowledge map    Save This paper addresses issues existing in traditional underwater robots during marine resource surveys， such as low propulsion efficiency， poor terrain adaptability， and insufficient sample analysis accuracy. To solve these problems， this paper proposes a bionic underwater robot design scheme based on the biological form of anglerfish， which integrates plasma superconducting magnetohydrodynamic propulsion， multi-physical field detection， and bionic structure design. This scheme provides a strong reference for underwater marine research. Related Articles | Metrics | Comments（0）