International Journal of Naval Architecture and Ocean Engineering最新文献_第2页

A Kolmogorov-Arnold network-based method for predicting underwater explosion shock spectrum considering cabin structural characteristics 基于Kolmogorov-Arnold网络的水下爆炸冲击谱预测方法

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100671

Xiaodi Liang, Yindong Liu, Siqi Wang

{"title":"A Kolmogorov-Arnold network-based method for predicting underwater explosion shock spectrum considering cabin structural characteristics","authors":"Xiaodi Liang, Yindong Liu, Siqi Wang","doi":"10.1016/j.ijnaoe.2025.100671","DOIUrl":"10.1016/j.ijnaoe.2025.100671","url":null,"abstract":"<div><div>This study introduces an innovative approach for the rapid prediction of shock spectrum in ship structures subjected to underwater far-field explosion loads. A nine-compartment ship model is developed, with 31 test condition sets designed. For each set, sample measurement points are strategically placed at typical locations across various deck levels and on the inner and outer bottoms of the double bottom at different frame cross-sections. Shock spectrum (including spectral velocity, acceleration, and displacement) are extracted from these sample points to establish a comprehensive shock spectrum database. Using the Kolmogorov-Arnold Network, a rapid prediction model for ship structure shock spectrum is developed. The network's inputs include ship structural formal parameters (e.g., number and position of decks, transverse and longitudinal bulkheads), impact factors, feature transfer distances, and local shock factors. Spectral velocity, acceleration, and displacement are used as the network's outputs during training. A comparative analysis of prediction accuracy among the Kolmogorov-Arnold Network, Backpropagation Network, and Convolutional Neural Network is conducted. The results demonstrate that the Kolmogorov-Arnold Network exhibits superior predictive accuracy compared to the Backpropagation and Convolutional Neural Networks. In contrast to existing finite element simulation methods, the proposed approach is simpler and more practical. Furthermore, unlike current rapid prediction methods, the proposed method takes into account the influence of ship structural characteristics on underwater explosion shock responses, making it better suited to the requirements for rapid prediction of underwater far-field explosion shock spectrum in ship structures.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100671"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of water management and reactant distribution in PEM fuel cells with a convergent 5-channel serpentine flow field for emission-free ships 无排放船舶5通道蛇形流场PEM燃料电池水管理及反应物分布数值分析

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100649

Rashed Kaiser , Chi-Yeong Ahn , So-Yeon Lee , Yun-Ho Kim , Jong-Chun Park

{"title":"Numerical analysis of water management and reactant distribution in PEM fuel cells with a convergent 5-channel serpentine flow field for emission-free ships","authors":"Rashed Kaiser , Chi-Yeong Ahn , So-Yeon Lee , Yun-Ho Kim , Jong-Chun Park","doi":"10.1016/j.ijnaoe.2025.100649","DOIUrl":"10.1016/j.ijnaoe.2025.100649","url":null,"abstract":"<div><div>Polymer Electrolyte Membrane Fuel Cells (PEMFCs) represent a promising energy solution for the marine industry, facilitating a sustainable transition from fossil fuels to emission-free alternatives. Despite their high power density and efficiency, water management is an issue. The serpentine flow channel (SFC) design is known for its efficient reactant distribution and enhanced water removal due to high-pressure drops when certain design conditions are met. Regardless these channels exhibit drawbacks such as increased flow resistance due to extended lengths and sharp bends, alongside non-uniform reactant distribution near the channels. This study develops a multiphase three-dimensional model to simulate the transport of mass, species and water within a PEMFC equipped with a five-channel SFC. The simulation results are validated through experiments and compared with two novel convergent 5-channel serpentines. The newly proposed convergent five-channel SFCs demonstrated improved performance at high current densities, notably in power density, pressure drop, water distribution, and removal.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100649"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RANS analysis of the self-propulsion performance for a twin-screw ship 双螺杆船舶自推进性能的RANS分析

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100674

Je-In Kim , Bu-Geun Paik , Jong-Woo Ahn , Il-Ryong Park

引用次数: 0

Experimental study on ultimate bearing capacity of pre-cracked ship hull stiffened panel under low-cycle fatigue and accumulative plasticity coupling 低周疲劳-累积塑性耦合作用下预裂船体加筋板极限承载力试验研究

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100688

Xu Geng , Dong Qin

{"title":"Experimental study on ultimate bearing capacity of pre-cracked ship hull stiffened panel under low-cycle fatigue and accumulative plasticity coupling","authors":"Xu Geng , Dong Qin","doi":"10.1016/j.ijnaoe.2025.100688","DOIUrl":"10.1016/j.ijnaoe.2025.100688","url":null,"abstract":"<div><div>Ships navigating in complex sea conditions typically do not experience catastrophic failure due to a single extreme load; rather, the primary structural components such as stiffened panels of the hull undergo plastic deformation under repeated cyclic loading and may develop cracks under low-cycle fatigue. This leads to a decrease in ultimate bearing capacity and eventual structural failure due to insufficient ultimate strength, resulting in hull buckling. Currently, methods for evaluating the ultimate strength of ship hull stiffened panels under cyclic extreme loading considering the coupling effects of accumulative plasticity and low-cycle fatigue are not well-developed. Therefore, there is a need for research into computational methods for assessing the ultimate strength of stiffened panels structures considering the coupling effects of these two factors. This paper investigates the ultimate load-bearing capacity of pre-cracked stiffened panels under the combined effects of accumulative plasticity and low-cycle fatigue. During the experiments, hysteresis curves of stress-strain relationships and relevant fracture parameters for stiffened panels were obtained under various crack positions and load conditions. Ultimately, the study provides the ultimate load-bearing capacity of stiffened panels considering low-cycle fatigue and accumulative plasticity interactions, offering a foundational calculation basis for designing vessels under severe sea conditions.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100688"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of maneuvering models for wind-assisted ships with large rudders using virtual captive tests 基于虚拟约束试验的大舵风助船舶操纵模型辨识

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100664

Martin Alexandersson , Wengang Mao , Jonas W. Ringsberg , Martin Kjellberg

{"title":"Identification of maneuvering models for wind-assisted ships with large rudders using virtual captive tests","authors":"Martin Alexandersson , Wengang Mao , Jonas W. Ringsberg , Martin Kjellberg","doi":"10.1016/j.ijnaoe.2025.100664","DOIUrl":"10.1016/j.ijnaoe.2025.100664","url":null,"abstract":"<div><div>Ships with wind-assisted propulsion systems (WAPS) are often equipped with large rudders to compensate for WAPS-induced drifting forces. The WAPS also significantly affects the effectiveness of mathematical models used to describe the ship’s maneuvering characteristics. In this study, a modular maneuvering model is proposed to enhance the original MMG model, with the aim of producing accurate maneuvering simulations for ships with WAPS. Methods of virtual captive tests (VCT) are proposed to recreate the forces acting on WAPS ships during free-running model tests (FRMT) in motor mode, identifying all the parameters in the modular model. The hydrodynamic damping coefficients within the model are determined through linear regression of the VCT data. The added masses are then determined from pure yaw and pure sway simulations using a fully nonlinear potential flow (FNPF) panel method. Two ships designed for WAPS, wPCC and Optiwise, are used to validate the proposed method based on the inverse dynamics of their experimental model tests. The wPCC is equipped with a semi-empirical rudder that has previously shown to work well for this twin-rudder ship. The Optiwise single rudder is modeled with a new quadratic version of the MMG rudder model, proposed in this paper. Inverse dynamics analysis, together with state VCTs, is concluded to be an efficient way to analyze the models, and the maneuvering model can be efficiently identified when the correct VCTs are used in the proposed method. However, the inverse dynamics analysis also revealed potential errors in the wPCC VCT data due to false assumptions about wave generation and roll motion. The Optiwise test case, where these assumptions should be more valid, showed much better agreement with the FRMT inverse dynamics.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100664"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-based optimal value calculation for welding variables in AR training 基于机器学习的AR训练中焊接变量最优值计算

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100652

Chang Sub Song , Jong-Ho Nam

{"title":"Machine learning-based optimal value calculation for welding variables in AR training","authors":"Chang Sub Song , Jong-Ho Nam","doi":"10.1016/j.ijnaoe.2025.100652","DOIUrl":"10.1016/j.ijnaoe.2025.100652","url":null,"abstract":"<div><div>Currently, the shipbuilding industry is experiencing a surge in orders due to the rising demand for eco-friendly ships, necessitating the optimal use of available resources for production. However, the production workforce has not fully recovered to the level required to meet these increased orders following large-scale industry restructuring. In particular, there is a shortage of highly skilled welders, and concerns are growing about the transfer of expertise due to an aging workforce and a lack of younger workers. Shipbuilders worldwide face similar challenges and are exploring various methods to transfer the tacit knowledge of skilled welders to less experienced workers, which has introduced unforeseen challenges. In this study, we develop a machine learning algorithm that suggests the optimal values of key welding variables for an AR-based welding training system designed to assist less skilled workers. We collected welding data from highly skilled workers using the FCAW (Flux-Cored Arc Welding) technique, which is commonly employed in the shipbuilding process. The welding variables that represent tacit knowledge were identified and trained using the Extra Trees Regressor model. Subsequently, a welding AR training system was implemented, allowing the trained model to guide users on the optimal values for welding variables. Finally, the effectiveness of this system in training welders was verified at a shipyard technical training center.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100652"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of ship operational performance degradation using deep-learning-based fuel oil consumption prediction models 基于深度学习的燃油消耗预测模型的船舶使用性能退化估计

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100666

Donghyun Park , Jae-Yoon Jung , Beom Jin Park

引用次数: 0

Performance analysis of Flettner rotor considering Marine wind profile and ship installation using CFD 考虑海上风廓线和船舶安装的Flettner转子性能CFD分析

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100653

SeongMo Yeon, Chang Seop Kwon, Yoo-Chul Kim, Kwang Soo Kim, Yeon Gyu Kim, Yun Ho Kim, Hee Jin Kang

{"title":"Performance analysis of Flettner rotor considering Marine wind profile and ship installation using CFD","authors":"SeongMo Yeon, Chang Seop Kwon, Yoo-Chul Kim, Kwang Soo Kim, Yeon Gyu Kim, Yun Ho Kim, Hee Jin Kang","doi":"10.1016/j.ijnaoe.2025.100653","DOIUrl":"10.1016/j.ijnaoe.2025.100653","url":null,"abstract":"<div><div>The study investigated a Flettner rotor performance on a hull, analyzing design modifications and wind profiles for a small catamaran which designed by KRISO for the K-Energy Observer platform was analyzed. The rotor mounted on the hull showed a nearly 48% performance degradation in lift coefficient compared to the standalone rotor due to the disturbed flow by the hull at spin ratios 3–4. Two design factors were examined to improve performance: foundation shape and bottom configuration of the rotor. A square foundation shape showed relatively better improvement but it was not significant. On the other hand, it was found that the rotating end plate significantly improved thrust, achieving up to 80% of the standalone rotor’s performance. Comparing uniform and Norwegian Petroleum Directorate (NPD) wind profiles, the NPD profile showed a 12% improvement due to stronger winds at the rotor’s upper section. The study also compared performance under different wind directions and it showed a 20% increase at 30° and 18% at 60° for the original configuration. In contrast, the rotating end plate configuration showed a 6% decrease at 30° but a 10% increase at 60°. However, overall performance improvement was observed in the rotating end plate configuration with increases of 12%, 34%, and 44% for 30°, 60° and 90° compared to the original configuration. Additionally, under a 5° inclined hull condition, performance decreased by 21% for the original configuration but only 13% for the rotating end plate configuration, which highlighted the design’s effectiveness in mitigating performance loss.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100653"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated analysis of ice-induced vibration characteristics of monopile offshore wind turbines 单桩海上风力发电机组冰激振动特性综合分析

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100687

Yijie Zhao , Zhenju Chuang , Yan Qu , Haoyang Yin , Zhenze Yang , Lulin Xia

{"title":"Integrated analysis of ice-induced vibration characteristics of monopile offshore wind turbines","authors":"Yijie Zhao , Zhenju Chuang , Yan Qu , Haoyang Yin , Zhenze Yang , Lulin Xia","doi":"10.1016/j.ijnaoe.2025.100687","DOIUrl":"10.1016/j.ijnaoe.2025.100687","url":null,"abstract":"<div><div>The rapid development of offshore wind power in cold regions drives turbine deployment into deep-sea areas, yet ice-induced loads pose severe challenges to structural safety. This study aims to accurately predict dynamic responses of offshore wind turbines under ice-wind coupling, proposing a Discrete Element Method-Wind Turbine Integrated Analysis (DEM-WTIA) approach. This method synchronously simulates ice fragmentation processes and aero-structural dynamic responses by constructing an integrated model with rotor and control systems. Findings reveal: The model precisely captures transient energy dissipation during ice crushing and characterizes high-low frequency coupling effects with nonlinear superposition of ice-wind-wave loads; Tower-top displacement sensitivity to ice loads significantly exceeds foundation displacement; Under no-wind/cut-in wind speeds (3–5 m/s), ice dominates tower vibration, while aerodynamic damping suppresses ice-induced vibrations at rated/cut-out speeds; Spectral analysis shows dominant displacement frequency shifts from 0.27 Hz (near OWT fundamental frequency) to 0.24 Hz as wind increases; Sensitivity analysis indicates ice thickness sensitivity index (35.6) far exceeds ice velocity (7.2) in parked mode; Anti-ice design identifies 70° cone angle as optimal for monopile foundations. This research provides critical theoretical support and a novel simulation method for anti-ice design of offshore wind structures in cold seas, offering key technical guidance for far-sea wind farm planning.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100687"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A sequential-generation-based intelligent method for layout of pipeline supports 基于顺序生成的管道支架智能布置方法

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100661

Jingjing Wu, Qichang He

引用次数: 0