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

Domain-Model-Map-based reinforcement learning for feedforward anti-sway control of overhead cranes 基于领域模型映射的桥式起重机前馈防摇控制强化学习

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-04-08 DOI: 10.1016/j.ijnaoe.2026.100763

Soochang Jang, Hyeonwook Kang, Jonghyeok Park, Junghan Kwon

{"title":"Domain-Model-Map-based reinforcement learning for feedforward anti-sway control of overhead cranes","authors":"Soochang Jang, Hyeonwook Kang, Jonghyeok Park, Junghan Kwon","doi":"10.1016/j.ijnaoe.2026.100763","DOIUrl":"10.1016/j.ijnaoe.2026.100763","url":null,"abstract":"<div><div>Overhead cranes are widely used in industries such as shipbuilding and construction, enabling efficient handling of heavy loads. However, achieving precise control of overhead cranes remains a challenge, primarily due to undesired oscillations of the heavy loads, especially under varying rope lengths. Traditional feedforward control methods are effective only under constant rope length, limiting performance during simultaneous hoist and trolley operation. Feedback-based approaches can compensate for changing conditions but often rely on complex sensor integration and continuous velocity adjustments, which may increase system complexity and operation cycle time. To address these practical challenges, this study proposes a reinforcement learning (RL)-based feedforward control approach that integrates a model-based offline ensemble with online selection to maintain high performance across diverse conditions. In a simulation crane model environment, the RL agent is trained to generate trajectories that minimize both residual sway angle and operating time. The proposed strategy pre-identifies optimal models for specific operating domains, allowing for efficient execution by selecting a single optimal model during the online stage. Although this approach involves a trade-off requiring substantial offline training to construct the model map, it reduces online complexity suitable for industrial PLCs. This approach minimizes the real-time computational burden compared to conventional ensemble methods, generating near-optimal trajectories under varying rope lengths without relying on explicit sensor feedback. We validated this method through simulations and experimental tests, demonstrating a 38% reduction in operation time and effective sway suppression with residual angles under 0.3°, which demonstrates its feasibility for practical industrial applicability.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100763"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147749128","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

Assessing the performance of PANS and RANS for accurate wake flow prediction around the KVLCC2 评估pan和RANS在KVLCC2周围尾流准确预测中的性能

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-01-14 DOI: 10.1016/j.ijnaoe.2026.100741

Hyeri Lee , Changhun Lee , Woochan Seok

{"title":"Assessing the performance of PANS and RANS for accurate wake flow prediction around the KVLCC2","authors":"Hyeri Lee , Changhun Lee , Woochan Seok","doi":"10.1016/j.ijnaoe.2026.100741","DOIUrl":"10.1016/j.ijnaoe.2026.100741","url":null,"abstract":"<div><div>This study presents a comparative analysis of the partially-averaged Navier-Stokes (PANS) and Reynolds-averaged Navier-Stokes (RANS) models for predicting secondary turbulence flows in the propeller plane of the KRISO Very Large Crude Carrier 2 (KVLCC2). Numerical simulations were performed using the open-source Computational Fluid Dynamics (CFD) software OpenFOAM, and the results were validated against experimental data. The study specifically examines the capability of both models to capture unsteady flow phenomena, particularly in regions of anisotropic turbulence, such as the hook-shaped vortices observed in the wake of the KVLCC2. The performance of the models was also evaluated at different grid resolutions, with the PANS model demonstrating superior ability to resolve intricate vortex structures, including the hook-shaped vortex in the propeller plane. Notably, the PANS model exhibited enhanced accuracy with finer grids, leading to improved resolution of turbulent kinetic energy distributions. These findings highlight the advantages of PANS over RANS in accurately predicting wake characteristics and provide valuable insights for improving CFD-based propeller design.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100741"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074223","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

Stress factors in helical components of a 66 kV dynamic inter-array power cable for floating offshore wind turbines under tension dominant conditions 张力优势条件下浮动式海上风力发电机组66 kV动态阵列间电力电缆螺旋构件应力因子研究

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-06-01 DOI: 10.1016/j.ijnaoe.2026.100775

Doyoung Kwon , Nguyen Tri Hoang , Hyun Kyung Kim , Joonmo Choung

{"title":"Stress factors in helical components of a 66 kV dynamic inter-array power cable for floating offshore wind turbines under tension dominant conditions","authors":"Doyoung Kwon , Nguyen Tri Hoang , Hyun Kyung Kim , Joonmo Choung","doi":"10.1016/j.ijnaoe.2026.100775","DOIUrl":"10.1016/j.ijnaoe.2026.100775","url":null,"abstract":"<div><div>This study investigates stress factors of helical components in a 66 kV dynamic inter-array power cable used for floating offshore wind turbines and examines their influence on fatigue damage evaluation. A detailed three-dimensional finite element analysis (FEA) was conducted to derive the stress–strain relationships of copper conductors and steel wire armors within the cable. The stress factor was defined as the ratio between the von Mises stress acting on individual components and the nominal stress calculated from the overall cable cross section. To obtain realistic loading conditions, fully coupled load analysis (FCLA) was performed for a 15 MW floating offshore wind turbine operating in offshore environmental conditions. The global load time histories obtained from the FCLA were used to derive nominal stresses and strains of the cable cross section. By combining these results with the stress–strain relationships derived from the FEA, the actual stress histories of the helical components were determined using the stress factors. The results show that even under pure tensile loading, helical components experience combined axial, bending, and torsional shear stresses due to their geometric configuration, leading to von Mises stresses greater than the nominal stress of the overall cross section. In addition, the stress factor exhibited nonlinear behavior depending on the axial strain. When the stress factors were applied in the fatigue assessment, the accumulated fatigue damage increased by approximately three times for the armors and six times for the conductors. The proposed approach enables efficient estimation of the actual stress histories of internal cable components without performing repeated dynamic three-dimensional FEA, thereby improving the reliability of fatigue life assessment for dynamic power cables used in floating offshore wind applications.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100775"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148241218","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

Temperature-modified Tsai–Wu failure analysis of CFRP layers in flexible risers 柔性立管CFRP层的温度修正Tsai-Wu失效分析

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-05-23 DOI: 10.1016/j.ijnaoe.2026.100773

Rui Bao , Chen An , Yu Zhang , Changyun Li , Menglan Duan

{"title":"Temperature-modified Tsai–Wu failure analysis of CFRP layers in flexible risers","authors":"Rui Bao , Chen An , Yu Zhang , Changyun Li , Menglan Duan","doi":"10.1016/j.ijnaoe.2026.100773","DOIUrl":"10.1016/j.ijnaoe.2026.100773","url":null,"abstract":"<div><div>The residual stress generated during the winding process of CFRP layers plays a critical role in determining the structural integrity and manufacturing quality of marine flexible risers. These stress not only modifies the pre-tensioning force of composite layers but also significantly affect the global mechanical response and failure behavior. However, residual stress and complex temperature factors generated during the manufacturing process are often ignored, and existing failure criteria for composite materials do not fully consider temperature factors, which limits the applicability to composite tensile armor layers. Based on the time–temperature superposition principle, this study reveals how temperature variation influences the strength and the failure of flexible risers under residual stress. A temperature-correction factor is introduced to modify the Tsai–Wu failure criterion, enabling a deeper investigation of temperature effects on interlayer failure modes in composites. In addition, a real stress model is developed by combining user subroutines to account for the superposition of residual stress and external loading. This approach clarifies the failure mechanisms of both fibers and matrix in the composite tensile armor layers. Finally, damage assessments are carried out to evaluate the influence of residual stress on failure behavior, providing useful guidance for the safe design of flexible risers.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100773"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148241246","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 investigation on the turning motion of a near-surface self-propelled submarine 近水面自航潜艇转向运动的数值研究

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2025-12-08 DOI: 10.1016/j.ijnaoe.2025.100718

Haipeng Guo , Yi Liu , Junyu Ge , Lin Du , Guangnian Li

引用次数: 0

An integrated path tracking and obstacle avoidance method for weakly maneuverable AUVs under prescribed path constraints 基于路径约束的弱机动水下机器人路径跟踪与避障集成方法

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-03-20 DOI: 10.1016/j.ijnaoe.2026.100757

Jian Wang , Zhen Hu , Hua Zhang

{"title":"An integrated path tracking and obstacle avoidance method for weakly maneuverable AUVs under prescribed path constraints","authors":"Jian Wang , Zhen Hu , Hua Zhang","doi":"10.1016/j.ijnaoe.2026.100757","DOIUrl":"10.1016/j.ijnaoe.2026.100757","url":null,"abstract":"<div><div>Path tracking and obstacle avoidance are essential for autonomous underwater vehicles (AUVs). During obstacle avoidance, AUVs must minimize path deviations and quickly return to the preset path. The weak maneuverability of AUVs increases the difficulty of obstacle avoidance. We propose an integrated path-tracking and obstacle-avoidance control method for AUVs. First, a path-based artificial potential field (PAPF) is introduced to enable simultaneous path tracking and obstacle avoidance for AUVs. Second, a repulsive potential field with self-adjusting magnitude is designed on the basis of the relative motion between the AUV and obstacles, effectively addressing the obstacle avoidance delay for weakly maneuverable AUVs. Third, virtual obstacle and moving obstacle velocity fields are created to solve the problems associated with dynamic obstacles and local minima in traditional APF methods. Simulations and real-world tests of the Hai Xiang-500XP AUV demonstrate that the PAPF method effectively integrates path tracking with obstacle avoidance, enhancing responsiveness and adaptability in dynamic environments.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100757"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147538537","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 simulation study on the characteristics of wave induced loads of a 21000TEU ultra-large containership 21000TEU超大型集装箱船波浪诱导荷载特性的数值模拟研究

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-03-11 DOI: 10.1016/j.ijnaoe.2026.100756

Pengyao Yu , Renwei Zhang , Hao Guo , Bingbing Han , Yu Li

{"title":"Numerical simulation study on the characteristics of wave induced loads of a 21000TEU ultra-large containership","authors":"Pengyao Yu , Renwei Zhang , Hao Guo , Bingbing Han , Yu Li","doi":"10.1016/j.ijnaoe.2026.100756","DOIUrl":"10.1016/j.ijnaoe.2026.100756","url":null,"abstract":"<div><div>To investigate the behaviors of wave induced loads of a 21000TEU ultra-large container ships, this study develops a hydroelastic numerical approach that predicts springing responses by coupling a finite-volume flow solver with a multibody dynamics framework. The hydrodynamic force is computed using the open-source CFD package OpenFOAM, while structural deformations are determined with the multibody dynamics code MBDyn. The predictive capability of the method is validated against wave-basin experiments on the springing response of a 21000TEU containership. Subsequently, springing responses under various wave conditions are simulated, and their spatiotemporal characteristics are analyzed using amplitude–frequency response spectra and wavelet-scale spectral techniques. Results indicate that the second-order encounter frequency lies closest to the hull's wet natural vertical frequency, and that the corresponding vertical bending moment energy peaks at midship, constituting the primary cause of springing. Moreover, interaction between slamming loads and the hull's natural modes further amplifies the springing response.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100756"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147538689","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 framework and application for dynamic assessment of ship equipment based on multi-source data fusion and digital twins 基于多源数据融合和数字孪生的舰船装备动态评估框架及应用

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-02-12 DOI: 10.1016/j.ijnaoe.2026.100746

Nanzhe Song, Shaojuan Su, Pengyao Yu, Hongda Wang

{"title":"A framework and application for dynamic assessment of ship equipment based on multi-source data fusion and digital twins","authors":"Nanzhe Song, Shaojuan Su, Pengyao Yu, Hongda Wang","doi":"10.1016/j.ijnaoe.2026.100746","DOIUrl":"10.1016/j.ijnaoe.2026.100746","url":null,"abstract":"<div><div>Addressing diagnostic challenges in complex marine environments (high humidity, high salinity, multi-source interference, diverse fault types), this study uses a marine centrifugal fan to construct an intelligent condition assessment framework integrating digital twin and multi-source heterogeneous sensing. Vibration, visual, and speed data are synchronised and mapped to a lightweight digital twin for dynamic state perception. A fusion strategy based on robust Mahalanobis distance and convolutional neural networks identifies six fault modes (weighted F1 = 0.9965). A visual detection model tailored for ship compartments achieves <span><span><span>[email protected]</span></span><svg><path></path></svg></span> of 0.861 (cracks) and 0.827 (corrosion). Multi-modal results enhance adaptability and robustness to offshore conditions. Interactive programs enable real-time monitoring and fault visualisation. Experiments confirm high diagnostic accuracy, fast response, and efficient deployment, supporting intelligent ship equipment condition management.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100746"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147396305","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 method for transferring piping designs using past project data in shipbuilding 一种利用造船中以往项目数据传递管道设计的方法

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-03-02 DOI: 10.1016/j.ijnaoe.2026.100755

Min-Chul Kong , Myung-Il Roh , In-Su Han , Seong-Won Choi , Jeongyeon Kim

{"title":"A method for transferring piping designs using past project data in shipbuilding","authors":"Min-Chul Kong , Myung-Il Roh , In-Su Han , Seong-Won Choi , Jeongyeon Kim","doi":"10.1016/j.ijnaoe.2026.100755","DOIUrl":"10.1016/j.ijnaoe.2026.100755","url":null,"abstract":"<div><div>Ship piping design requires arranging many interconnected pipes within confined spaces while satisfying connectivity and collision constraints. This study proposed a data-driven method for transferring 3D pipe routes from past ship projects to a new target ship via a two-stage workflow: similar-system retrieval and route transfer with geometric adjustment. First, P&IDs (Piping and Instrumentation Diagrams) were converted into system graphs consisting of equipment nodes and connection edges. System similarity was computed by embedding graphs with graph2vec and ranking candidates by cosine similarity to retrieve past systems structurally closest to the target system. Second, the retrieved system's historical 3D routes were normalized by principal ship dimensions and used to construct a routing space. To reflect both proximity and segment orientation, DBSCAN (Density-Based Spatial Clustering of Applications with Noise) was extended with an angular-distance term between segment direction vectors, and the resulting clusters were merged and scaled to the target ship geometry. A past pipe centerline was then transferred into the routing space and adjusted by solving a constrained optimization with GA (Genetic Algorithm), where bend nodes are treated as design variables and their motion is restricted to preserve the original route shape. Feasibility was evaluated using a SphereCast-based collision penalty against hull and obstacle colliders. By enabling retrieval-conditioned reuse of proven route patterns and automated collision-aware adjustment within a learned routing space, the proposed method supports rapid generation of feasible initial piping layouts for new ship projects while reducing manual trial-and-error in early-stage routing.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100755"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147396763","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 study on aiming control and validation of a reinforcement learning-based fire monitor in maritime environments 海上环境下基于强化学习的火灾监视器瞄准控制与验证研究

IF 3.9 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2026-01-01 Epub Date: 2026-02-23 DOI: 10.1016/j.ijnaoe.2026.100752

Hyukcheon Kwon , Wonsun Ruy , Sangik Park , Hyuk Lee

{"title":"A study on aiming control and validation of a reinforcement learning-based fire monitor in maritime environments","authors":"Hyukcheon Kwon , Wonsun Ruy , Sangik Park , Hyuk Lee","doi":"10.1016/j.ijnaoe.2026.100752","DOIUrl":"10.1016/j.ijnaoe.2026.100752","url":null,"abstract":"<div><div>With the growing interest in autonomous ships, there has been an increasing demand for intelligent fire suppression systems that can operate reliably even under irregular sea conditions. This study proposes an autonomous aiming control approach for a fire monitor, designed to optimize its targeting performance through reinforcement learning (RL). A virtual environment was created using the Unity physics engine, which simulated ship motion and the dynamic behavior of discharged water while reflecting variations in sea states and discharge pressure. The proposed RL-based model was trained to improve aiming efficiency by observing the vessel's motion and nozzle pressure data measured by an inertial measurement unit (IMU) sensor and pressure sensor. The effectiveness of the model was verified through full-scale experiments conducted on an actual vessel operating under sea state about 3 condition. Experimental observations confirmed that the system maintained stable and precise fire-targeting performance in a real maritime environment. These results suggest that the proposed RL-based control approach can contribute to the automation of fire response operations for future unmanned autonomous ships.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"18 ","pages":"Article 100752"},"PeriodicalIF":3.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147396764","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