International Journal of Naval Architecture and Ocean Engineering最新文献

{"title":"A case study on the introduction of an advanced ship inspection method: Gross tonnage measurement 3D point clouds","authors":"Byung-Hwa Song ,&nbsp;Bon-Yeong Park ,&nbsp;Dong-Kun Lee","doi":"10.1016/j.ijnaoe.2025.100677","DOIUrl":"10.1016/j.ijnaoe.2025.100677","url":null,"abstract":"<div><div>This study examines the feasibility of gross tonnage (GT) measurement using 3D point cloud technology as a digital alternative to traditional manual methods. While ships over 24 m follow standardized regulations under the 1969 Tonnage Measurement Convention (TMC), those under 24 m are subject to diverse national rules, often based on simplified formulas. In this study, 3D point clouds were acquired using laser scanners for two Korean vessels—a government-owned ship over 24 m and a fishing vessel under 24 m. After post-processing, the enclosed volume was estimated using a convex hull algorithm and compared with GT values calculated under national standards. The point cloud-based method showed minimal variation, with a maximum difference of 0.30 % in volume and 0.23 TON in GT. These results indicate that 3D scanning provides a reliable and accurate alternative for GT measurement and offers potential for broader institutional adoption through standardized digital workflows.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100677"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780251","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}

{"title":"YOLO-ESFM: A multi-scale YOLO algorithm for sea surface object detection","authors":"Maochun Wei ,&nbsp;Keyu Chen ,&nbsp;Fei Yan ,&nbsp;Jikang Ma ,&nbsp;Kaiming Liu ,&nbsp;En Cheng","doi":"10.1016/j.ijnaoe.2025.100651","DOIUrl":"10.1016/j.ijnaoe.2025.100651","url":null,"abstract":"<div><div>Environmental perception and object detection are pivotal research topics in the marine domain. The sea surface presents unique challenges, including harsh weather conditions, wave interference, and multi-scale targets, often resulting in suboptimal detection results. To address these issues, we present an innovative solution: the integration of the Efficient Scale Fusion Module (ESFM) into the advanced YOLO architecture, resulting in the enhanced model, YOLO-ESFM. The ESFM serves as both the backbone and detection head of the network, significantly improving performance compared to the baseline models in YOLOv5s, YOLOv7-tiny, and YOLOv7. Furthermore, to tackle the limitations of the CIOU in YOLOv7, we introduce an improved method, ZIOU, which has been rigorously evaluated and proven effective on the Sea Surface Target Dataset. Comparative studies demonstrate that YOLO-ESFM not only maintains efficiency in terms of parameters and FLOPs but also surpasses YOLOv7 in detection accuracy on both the Sea Surface Target Dataset and the PASCAL VOC 07+12 Dataset.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100651"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610254","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}

{"title":"The extended modified Logvinovich model: Application to the water entry of two-dimensional wedges","authors":"Yang Zhang ,&nbsp;Se-Myong Chang ,&nbsp;Deuk-Joon Yum","doi":"10.1016/j.ijnaoe.2024.100631","DOIUrl":"10.1016/j.ijnaoe.2024.100631","url":null,"abstract":"<div><div>A planing craft is one of the most commonly used types for small high-performance vessels since it helps to mitigate the severe viscous friction between the ship hull and water. Therefore, it is essential to develop methods for quickly and accurately estimating the running attitude during the early design phase and in actual operational conditions. We propose the Extended Modified Logvinovich Model (EMLM) for water entry to address the flow separation problem when a wedge-shaped hull enters the free surface during motion. Utilizing a two-dimensional approximation, we analyzed the fundamental potential flow through mathematical techniques for unsteady flow. As a verification, we calculated the dynamic vertical force coefficient compared with CFD(computational fluid dynamics) based on BEM(boundary element method) and an analytic similarity solution, where the results demonstrated good agreement with experimental data for validation.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100631"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164719","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}

{"title":"Fatigue performance of hybrid laser arc welded joints with high manganese steel","authors":"Ji-Hoon Kim ,&nbsp;Won-Chan Jeong ,&nbsp;Insung Choi ,&nbsp;Kwang-Hyeon Lee ,&nbsp;Myung-Hyun Kim","doi":"10.1016/j.ijnaoe.2025.100660","DOIUrl":"10.1016/j.ijnaoe.2025.100660","url":null,"abstract":"<div><div>The increasing demand for eco-friendly energy has led to a rise in the use of liquefied natural gas (LNG) ships, necessitating materials with superior mechanical and fatigue performance at cryogenic temperatures. High manganese steel has emerged as a promising alternative to conventional cryogenic steels due to its excellent mechanical properties. However, research on its fatigue performance, particularly in hybrid laser arc welding (HLAW), remains limited. This study evaluates the fatigue performance of HLAW joints in high manganese steel and compares the results with those from other welding processes. Comprehensive fatigue tests, including fatigue crack propagation analysis, were conducted to assess the fatigue resistance of the weldments. The results demonstrate that HLAW weldments exhibit superior fatigue resistance and mechanical properties compared to conventional arc-welded joints. These findings confirm the suitability of HLAW for LNG applications with high manganese steel, offering improved weld quality and increased productivity.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100660"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899380","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}

{"title":"Analysis of real-time ship manoeuvring simulation with a ship collision avoidance E-navigation aid system","authors":"Kun-Yuan Tsai ,&nbsp;Chih-Chung Fang","doi":"10.1016/j.ijnaoe.2025.100669","DOIUrl":"10.1016/j.ijnaoe.2025.100669","url":null,"abstract":"<div><div>This study aims to develop a smart navigation database for ship manoeuvring based on real-time simulations in calm water. In the ship manoeuvring simulation, the entry of a large container ship into the Kaohsiung and Keelung harbours is executed by different marine mates by using the PC version of the real-time ship simulator. First, multiple real-time simulations are conducted for each harbour, and qualitative analyses are performed based on relevant statistics. Furthermore, the ship collision avoidance E-navigation-aid system developed by the authors is used to assist the five marine mates in entering the Kaohsiung and Keelung harbours, and the differences between the scenario in which the mates are assisted by the system and that in which they perform manual operation are discussed. Finally, based on simulation statistics, comparisons of voyage time, voyage distance, and rudder operation with and without the ship collision avoidance E-navigation-aid system are presented and discussed.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100669"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470074","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}

{"title":"A simplified experimental soil-leg interaction model for ship to Jack-up leg collision","authors":"Jung Kwan Seo ,&nbsp;O-Hyun Kwon ,&nbsp;Dae Kyeom Park ,&nbsp;Joo Shin Park","doi":"10.1016/j.ijnaoe.2025.100682","DOIUrl":"10.1016/j.ijnaoe.2025.100682","url":null,"abstract":"<div><div>Jack-up units have recently become common due to the expansion of offshore drilling and installation vessels. In most previous research, guidelines for related jack-up rig structures have assessed the interaction with the soil structure during installation in terms of penetration of a spudcan. However, the design of safe operating conditions must also take into account the interactions with the soil structure in case of horizontal impact loads from collisions with attendant and/or passing vessels. It is therefore important to consider the risk-based design of rig foundations, incorporating a study of soil-structural characteristics, to minimise the effects of collision accidents that may occur under operating conditions. In this study we develop a fundamental dataset and a simplified understanding of soil stiffness that will enable the simulation of the rig-installation process using simplified experimental models that involve soil modelling, and penetration and impact. These data will be used in structural design and risk management for industrial practices as well as in further validation/calibration studies for advanced numerical/experimental modelling and design guidance.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100682"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988666","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}

{"title":"Effective energy density in small vessels: a comparative study of diesel engines and battery electric propulsion systems","authors":"Haiyang Zhang ,&nbsp;Maydison ,&nbsp;Heejin Kang ,&nbsp;Yun-Ho Kim ,&nbsp;Jaewon Jang ,&nbsp;Zhiqiang Han ,&nbsp;Daekyun Oh","doi":"10.1016/j.ijnaoe.2025.100681","DOIUrl":"10.1016/j.ijnaoe.2025.100681","url":null,"abstract":"<div><div>The electric propulsion system has recently attracted considerable interest due to its advantages in reducing emissions. Nevertheless, the deployment of electric propulsion systems in small vessels necessitates rigorous examination and validation. Rather than adopting electric propulsion systems without due consideration, it is preferable to conduct a comprehensive evaluation of their feasibility at the design stage. This study proposes an evaluation method for propulsion systems suitable for small vessels based on effective energy density. The objective is to consider propulsion system equipment factors from the design stage and assess their applicability to small vessels. A reverse design of a battery electric propulsion system for a GT 9.77 fishing boat was conducted, and its effective energy density was compared with that of the original diesel engine propulsion system. The findings demonstrate that under identical weekly sailing design requirements, the effective gravimetric energy density and effective volumetric energy density of the diesel engine propulsion system are 11.95 times and 13.14 times greater, respectively, than those of the battery electric propulsion system. This finding indicates that, given the limitations of current battery technology, battery electric propulsion systems are not a viable option for long-duration sailing fishing boats. Further analysis indicates that the effective energy density of the battery electric propulsion system is superior to that of the diesel engine propulsion system under low-speed, short-duration operating conditions. The findings of this study indicate that the evaluation method based on effective energy density at the design stage is an effective means of determining the suitability of a chosen propulsion system for specific application needs of small vessels. This approach facilitates the design and selection of appropriate propulsion systems.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100681"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842351","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}

{"title":"Development of flaw acceptance criteria and quality control measures for highly skewed propeller blades","authors":"Hyeon-Su Kim ,&nbsp;Dong-Hyun Moon ,&nbsp;Dong-Ju Lee ,&nbsp;Myung-Hyun Kim","doi":"10.1016/j.ijnaoe.2025.100685","DOIUrl":"10.1016/j.ijnaoe.2025.100685","url":null,"abstract":"<div><div>Highly skewed propellers (HSPs), with skew angles over 25 degrees, are widely used to improve propulsion efficiency and reduce noise. However, their unique geometry can negatively impact fatigue performance, especially in nickel-aluminum-bronze (NAB) blades prone to casting flaws. This study re-evaluated current quality control standards, focusing on the risk of thermal embrittlement from post-weld heat treatment (PWHT), which may lower fatigue resistance in repair welds. As an alternative, shot peening was proposed and optimized to enhance fatigue life while meeting quality standards. Additionally, a new flaw evaluation algorithm was developed to visualize the stress intensity factor range (ΔK) and identify severity zones based on the fatigue crack growth threshold (ΔK_th). Flaws inside the severity zone undergo fatigue crack growth analysis, while those outside may not require repair. This method enables a more efficient, quantitative assessment of flaw acceptability, improving both the reliability and quality control of HSP blades.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100685"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996398","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}

{"title":"Finite time trajectory tracking control of underwater salvage robot under full-state constraints","authors":"Xue Bai,&nbsp;Yan Zhang,&nbsp;Wenyi Tan,&nbsp;Yang Liu,&nbsp;Baihui Jiang,&nbsp;Jiawei Wang","doi":"10.1016/j.ijnaoe.2025.100663","DOIUrl":"10.1016/j.ijnaoe.2025.100663","url":null,"abstract":"<div><div>Aiming at the problem that the trajectory tracking of underwater salvage robots is subject to model uncertainty and complex unknown interference when working in the marine environment, a finite time trajectory tracking control scheme based on command filtering and full-state constraint is proposed. The scheme uses the super-twisting algorithm to design the observer to accurately estimate the composite disturbance composed of model uncertainty and unknown complex time-varying disturbance in the system. Secondly, the finite-time command filter based on the first-order Levant differentiator is introduced to solve the problem of ”differential explosion” in deriving the virtual control law concerning time. The barrier Lyapunov function, backstepping control method, and finite-time control theory are combined to achieve finite time full-state constraints. Then, the control scheme is verified by Lyapunov stability, which can make the position error and velocity error of the system converge to the stable region in a finite time.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100663"},"PeriodicalIF":2.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221254","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}

{"title":"Wing shape optimization for an air-launched underwater glider considering impact loads and gliding performance","authors":"Qiang Wang ,&nbsp;Xiangcheng Wu ,&nbsp;Tianxiang Zhang ,&nbsp;Yuxin Xu","doi":"10.1016/j.ijnaoe.2025.100683","DOIUrl":"10.1016/j.ijnaoe.2025.100683","url":null,"abstract":"<div><div>The air-launched underwater glider has two typical scenarios that need to be specially considered in its design: the water impact stage after air-launched deployment and the gliding stage of the glider in the water. The wing shape of the underwater glider has a significant impact on the hydrodynamic performance in both scenarios. This study proposes a multi-objective optimization method for the wing shape optimization of air-launched gliders, comprehensively considering the gliding motion performance and impact load performance during water entry. An Artificial Neural Network (ANN) and Polynomial Response Surface (PRS) method were used to establish surrogate models for the gliding motion and impact load, respectively, and the accuracy of these surrogate models was verified. The sensitivities of the different design variables to the output parameters were analyzed. An optimized wing shape can improve the gliding range and reduce the impact load. Considering the uncertainties in the net buoyancy and energy consumption in practical applications, an interval optimization algorithm for wing shape optimization was proposed. The interval optimization results provided a more reasonable wing-shape design scheme.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"17 ","pages":"Article 100683"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917800","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}