Ocean Engineering最新文献_第9页

Fast prediction method for low-frequency wave loads based on fine-tune transfer learning 基于微调迁移学习的低频波载荷快速预测方法

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-26 DOI: 10.1016/j.oceaneng.2025.122008

Wang Ziyuan , Chen Shuai , Jiang Caixia

{"title":"Fast prediction method for low-frequency wave loads based on fine-tune transfer learning","authors":"Wang Ziyuan , Chen Shuai , Jiang Caixia","doi":"10.1016/j.oceaneng.2025.122008","DOIUrl":"10.1016/j.oceaneng.2025.122008","url":null,"abstract":"<div><div>The accurate determination of low-frequency wave loads is fundamental to the design of ship hull structures. However, current research faces challenges in accurately and efficiently determining wave design loads on a water surface. To enhance design efficiency, reduce labor costs, leverage existing data, and achieve economic savings, this study proposes a wave-load forecasting method. This study compiles physical test data on wave loads and employs a two-dimensional strip theory to calculate 5400 sets of irregular wave-load scenarios. These scenarios constitute the source-domain in a pre-transfer learning network utilizing deep neural networks and are subsequently applied to experimental data from ship model tank tests. An independent fine-tuning network layer is incorporated into the transfer learning framework. Within this layer, the lost data are set to zero and not subjected to backpropagation. This network demonstrates robustness and exhibits excellent performance in cross-validation. Compared to simulation-based techniques, this approach demonstrates high accuracy, with an overall error margin of <10 %, and enables straightforward, rapid, and efficient forecasting of wave loads on ships.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 122008"},"PeriodicalIF":4.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

MTSP-NSGA-III based path planning for underwater glider swarm executing multi-point exploration missions 基于MTSP-NSGA-III的水下滑翔机群多点探测路径规划

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-26 DOI: 10.1016/j.oceaneng.2025.121985

Lijie Tan , Hongyu Wu , Yuxing Hao , Kunpeng Feng , Bo Wang , Yunqiang Yang , Shaoze Yan

{"title":"MTSP-NSGA-III based path planning for underwater glider swarm executing multi-point exploration missions","authors":"Lijie Tan , Hongyu Wu , Yuxing Hao , Kunpeng Feng , Bo Wang , Yunqiang Yang , Shaoze Yan","doi":"10.1016/j.oceaneng.2025.121985","DOIUrl":"10.1016/j.oceaneng.2025.121985","url":null,"abstract":"<div><div>The underwater glider swarm can efficiently and reliably execute water surface multi-point exploration missions through collaboration among individual gliders. To further improve the efficiency of a glider swarm in executing multi-point exploration missions under complex ocean currents, it is necessary to optimize the detection sequence of target exploration points, which is clearly a path planning problem. To address this issue, this paper establishes performance evaluation models for glider based on kinematic relationship and force analysis, enabling the quantitative analysis of energy consumption, motion accuracy and voyage time. On this basis, a point-to-point path planning method for glider is developed by combining the depth-averaged current velocity prediction method and the principle of motion synthesis. Furthermore, combining the point-to-point path planning method with the solution approach for the multiple traveling salesman problem (MTSP), a mathematical model for multi-point exploration path planning of glider swarm is proposed, aiming to improve the motion accuracy and reduce energy consumption and voyage time of the gliders. Based on the non-dominated sorting genetic algorithm III (NSGA-III), the solution method of the mathematical model is proposed. Finally, the effectiveness of the proposed method is validated by several numerical cases considering different ocean currents, summarizing some conclusions. The research work aims to provide theoretical guidance for the practical application of the underwater glider swarm.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121985"},"PeriodicalIF":4.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Critical details design for a deep-sea transparent manned cabin 深海透明载人舱的关键细节设计

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-26 DOI: 10.1016/j.oceaneng.2025.121990

Hao Pu , Xuyin Jiang , Zhihao He , Jinfei Zhang , Wenxin Qu , Fang Wang

{"title":"Critical details design for a deep-sea transparent manned cabin","authors":"Hao Pu , Xuyin Jiang , Zhihao He , Jinfei Zhang , Wenxin Qu , Fang Wang","doi":"10.1016/j.oceaneng.2025.121990","DOIUrl":"10.1016/j.oceaneng.2025.121990","url":null,"abstract":"<div><div>Transparent polymethyl methacrylate (PMMA) cabins can provide superior observation capabilities for marine operations. However, conventional design standards, rooted in empirical methods inadequately address the challenges of interface deformation coordination at PMMA-metal penetration connections. This study undertakes an investigation into the critical design parameters that influence deformation coordination and structural reliability. A benchmark spherical PMMA cabin designed for 1000 m depth was analyzed, focusing explicitly on interface deformation coordination under varying design conditions, including gasket presence, gasket thickness angle variations (2.5°–6°), and friction coefficient variations (0.10–0.30). Results demonstrate that the incorporation of a nylon gasket significantly enhances the deformation compatibility between the PMMA cabin and metal penetrations, resulting in a reduction of peak maximum principal stresses approximately by 11.6 % and leading to a substantial decrease in interface damage accumulation following repeated deep-sea cycles. Increasing the thickness angle of the gasket from 2.5° to 6° further enhances deformation uniformity, reduces stress concentrations by nearly 9.6 %, and decreases cumulative fatigue damage by approximately 43 %. Furthermore, maintaining interface friction coefficients of less than 0.15 has been shown to facilitate microslip at the interface, thereby significantly mitigating fatigue damage by preventing severe shear stress localization. This study establishes that prioritizing deformation coordination through targeted interface design.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121990"},"PeriodicalIF":4.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Damping cable-based vibration control of pile-supported offshore wind turbine tower 基于阻尼索的桩支海上风电塔架振动控制

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121921

Jianda Yu, Cheng Wang, Chao Luo, Boyuan Yin, Hongxin Sun

{"title":"Damping cable-based vibration control of pile-supported offshore wind turbine tower","authors":"Jianda Yu, Cheng Wang, Chao Luo, Boyuan Yin, Hongxin Sun","doi":"10.1016/j.oceaneng.2025.121921","DOIUrl":"10.1016/j.oceaneng.2025.121921","url":null,"abstract":"<div><div>The towers of pile-supported offshore wind turbines (OWTs) are prone to large-amplitude, multi-modal vibrations due to their low inherent damping and high flexibility, and softer foundation compared to onshore wind turbines. To suppress arbitrary-modal vibrations of the tower, a novel damping cable energy dissipation system is proposed, which converts the angular displacement of the bending vibrations into linear displacement, thereby driving the viscous damper to dissipate vibrational energy. Firstly, a third-order dynamic differential equation for the foundation-tower-damping cable is established, which simulates the rotational constraint of the flexible foundation on the tower using a torsional spring. Based on this, an analytical solution for the additional damping ratio provided by the damping cable is derived. Secondly, model experiments are validated the effectiveness of the damping cable in suppressing vibrations. Additionally, the influence of rotational constraint stiffness on the vibration reduction effect is analyzed. Finally, the effectiveness of the damping cable in suppressing vortex-induced vibrations (VIV) is examined using a coupled tower-wake oscillator model, and the numerical simulation is used to simulate the effect of vibration damping under wave loading. The study results indicate that, with a low damping coefficient, the damping cable can effectively suppress arbitrary-modal vibrations. Additionally, a decrease in the rotational constraint stiffness can enhance the damping effect of the damping cable.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121921"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 and analytical study of ship-bridge collision based on fluid-structure interaction 基于流固耦合的船桥碰撞数值模拟与分析研究

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121850

Tianyu Du, Hai Fang, Lu Zhu, Xinchen Zhang, Wei Han

{"title":"Numerical simulation and analytical study of ship-bridge collision based on fluid-structure interaction","authors":"Tianyu Du, Hai Fang, Lu Zhu, Xinchen Zhang, Wei Han","doi":"10.1016/j.oceaneng.2025.121850","DOIUrl":"10.1016/j.oceaneng.2025.121850","url":null,"abstract":"<div><div>Many ship-bridge collision studies underestimate the role of fluid dynamics, often relying on simplified models that assume a constant additional mass (CAM) for the ship. This approach neglects important factors such as ship profile and tonnage, leading to inaccuracies in collision predictions. To address this, a finite element model is developed using LS-DYNA, incorporating fluid dynamics in the ship-water-bridge interaction. This study examines the impact of fluid dynamics and key ship parameters—such as impact speed, draft depth, collision angle, and tonnage—on impact force, energy conversion, structural response, and ship damage. Comparisons between CAM and fluid-structure interaction (FSI) models show significant differences. For instance, higher impact velocity and draft depth increase ship damage, while the FSI model demonstrates that the fluid reduces structural damage through a “water cushion” effect. In collisions with large-tonnage, deep-draft ships, the CAM model underestimates peak collision force. These findings emphasize the importance of considering fluid effects in ship-bridge collision analyses and offer more accurate methods for future assessments.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121850"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Multi-target tracking and surrounding control for multi-USV system under unknown disturbances based on distributed NMPC 基于分布式NMPC的未知干扰下多usv系统多目标跟踪与周围控制

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121972

Yakun Zhu, Zhiming Li, Yaosen Li, Chao Yuan, Ge Guo

{"title":"Multi-target tracking and surrounding control for multi-USV system under unknown disturbances based on distributed NMPC","authors":"Yakun Zhu, Zhiming Li, Yaosen Li, Chao Yuan, Ge Guo","doi":"10.1016/j.oceaneng.2025.121972","DOIUrl":"10.1016/j.oceaneng.2025.121972","url":null,"abstract":"<div><div>As an important research area of unmanned vehicles, multi-unmanned surface vehicle (multi-USV) systems have demonstrated high efficiency, flexibility, and robustness in marine missions. In the context of collaborative control design for multi-USV systems, this paper investigates the multi-target tracking and surrounding control problem for multi-USV systems under unknown disturbances. During the multi-target tracking phase, a circular domain is constructed to enclose all targets, and the center of this circular domain is set as a virtual target, thereby transforming the tracking of moving targets into the tracking of a single virtual target. In the surrounding phase, an event-triggered mechanism is designed to address the escape behaviors of the multi-target. When an escape behavior occurs, the original multi-USV system allocates a portion of the USVs to form a subsystem to track and surround the escaping target, while the remaining USVs continue to surround the other targets. Therefore, to address the multi-target tracking and surrounding control problem for the multi-USV system, a distributed nonlinear model predictive(NMPC) control method is designed in this paper. Additionally, to obtain the precise state variables of multi-target, a Distributed Adaptive Unscented Kalman Filter (DAUKF) is designed to estimate the states of the targets. Finally, a numerical simulation is presented to demonstrate the feasibility and effectiveness of the control method designed in this paper.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121972"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Disturbance rejection control for underactuated surface vessels with input saturation 输入饱和欠驱动水面舰船的抗扰控制

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121986

Daohui Zeng , Xiaopeng Gong , Chengtao Cai , Yongchao Liu , Jie Zhao

{"title":"Disturbance rejection control for underactuated surface vessels with input saturation","authors":"Daohui Zeng , Xiaopeng Gong , Chengtao Cai , Yongchao Liu , Jie Zhao","doi":"10.1016/j.oceaneng.2025.121986","DOIUrl":"10.1016/j.oceaneng.2025.121986","url":null,"abstract":"<div><div>This paper presents a disturbance rejection control strategy for underactuated surface vessels (USVs) under input saturation. The proposed disturbance observer generates real-time estimates of low-frequency disturbances, which effectively compensate for the lumped disturbances encountered by the USV in dynamic environments. A theoretical analysis of the proposed observer is conducted from a complex frequency domain perspective, which reveals its response characteristics across varying frequencies. This analysis framework circumvents the stringent assumptions regarding the differentiability of disturbance signals imposed by traditional methods, which reduces the conservativeness of the approach. Furthermore, a disturbance rejection strategy is developed based on the proposed disturbance observer, which enhances the robustness of the designed USV controller. The controller incorporates an auxiliary dynamic system to ensure stable control of the USV under input saturation. Lyapunov stability analysis is employed to prove the stability of the closed-loop control system, which provides theoretical support for achieving robust control performance. Experimental results demonstrate that the proposed disturbance rejection control strategy significantly enhances control performance.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121986"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

An inland waterway navigation congestion mitigation strategy based on a multi-objective moment bottleneck model 基于多目标矩瓶颈模型的内河航运拥堵缓解策略

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121928

Pan Gao , Zeao Xu , Liusen Huang , Xu Zhao

{"title":"An inland waterway navigation congestion mitigation strategy based on a multi-objective moment bottleneck model","authors":"Pan Gao , Zeao Xu , Liusen Huang , Xu Zhao","doi":"10.1016/j.oceaneng.2025.121928","DOIUrl":"10.1016/j.oceaneng.2025.121928","url":null,"abstract":"<div><div>The management of ship traffic flow is an important way to mitigate waterway traffic congestion. In this study, the basic bottleneck model with multi-objective moments is extended to address the problem of lock congestion caused by uneven distribution of vessel traffic flow in inland navigation and explore the optimization strategy for balancing vessel traffic flow and realising green shipping. By analysing the interrelationship between port enterprises and carriers, a bottleneck model that can adjust the expected sailing time of ships is proposed. The study analyses the sailing state of ships under different circumstances, calculates the profit and loss of port enterprises adjusting the ship reception time to achieve the optimal staggered state, proposes a corresponding subsidy incentive mechanism, and explores the advantages of heterogeneous ship combinations in staggered peaks. The numerical experiments for the Three Gorges Dam (TGD) show that when ship travelling time meets staggered requirements, no-cost peaking can be achieved by coordinating the number of ships with different desired crossing times; when vessel travel times do not meet staggered requirements, subsidies can effectively promote port enterprises to choose staggered travel patterns. The staggered strategy not only reduces carbon emissions, but also brings additional social benefits.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121928"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

AI Captain: Conversational mission planning and execution system for autonomous surface vehicles AI队长：自动水面车辆会话任务规划和执行系统

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121988

Kim Alexander Christensen , Alexey Gusev , Andreas Gudahl Tufte , Ole Andreas Alsos , Martin Steinert

引用次数: 0

Adaptive prescribed-time trajectory tracking control for UVMS based on error transformation and adaptive prescribed-time filter 基于误差变换和自适应时间滤波器的UVMS自适应时间轨迹跟踪控制

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-25 DOI: 10.1016/j.oceaneng.2025.121993

Jingwei Yang , Haitao Liu , Xuehong Tian , Qingqun Mai , Jing Zhang

{"title":"Adaptive prescribed-time trajectory tracking control for UVMS based on error transformation and adaptive prescribed-time filter","authors":"Jingwei Yang , Haitao Liu , Xuehong Tian , Qingqun Mai , Jing Zhang","doi":"10.1016/j.oceaneng.2025.121993","DOIUrl":"10.1016/j.oceaneng.2025.121993","url":null,"abstract":"<div><div>In this paper, a new prescribed-time adaptive controller is proposed to further improve the response characteristics and robustness of underwater vehicle-manipulator systems (UVMS). First, an error transformation function with asymmetric time-varying constraints is designed, and a feasibility proof is given to ensure that the output of the system satisfies the constraints. Second, to solve the “complexity explosion” problem caused by the backstepping method, an adaptive prescribed-time filter is constructed to make the filtering error converge at a prescribed time. Third, to address the unknown nonlinear function, a simpler prescribed-time disturbance observer is proposed to estimate the external disturbances and model uncertainties to ensure that the disturbance estimation errors converge to a small set near the origin at a prescribed time. Then, the closed-loop system is proven to be prescribed-time stable via Lyapunov stability theory, and the states do not exceed the constraints. Finally, the proposed algorithm is shown to be effective through numerical simulations.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"338 ","pages":"Article 121993"},"PeriodicalIF":4.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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