Journal of Ocean Engineering and Science最新文献

Real-time prediction of ship motions based on the reservoir computing model 基于水库计算模型的船舶运动实时预测

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2024.07.001

Yu Yang, Tao Peng, Shijun Liao, Jing Li

{"title":"Real-time prediction of ship motions based on the reservoir computing model","authors":"Yu Yang, Tao Peng, Shijun Liao, Jing Li","doi":"10.1016/j.joes.2024.07.001","DOIUrl":"10.1016/j.joes.2024.07.001","url":null,"abstract":"<div><div>Real-time prediction of ship motions is crucial for ensuring the safety of offshore activities. In this study, we investigate the performance of the reservoir computing (RC) model in predicting the motions of a ship sailing in irregular waves, comparing it with the long short-term memory (LSTM), bidirectional LSTM (BiLSTM), and gated recurrent unit (GRU) networks. The model tests are carried out in a towing tank to generate the datasets for training and testing the machine learning models. First, we explore the performance of machine learning models trained solely on motion data. It is found that the RC model outperforms the LSTM, BiLSTM, and GRU networks in both accuracy and efficiency for predicting ship motions. Besides, we investigate the performance of the RC model trained using the historical motion and wave elevation data. It is shown that, compared with the RC model trained solely on motion data, the RC model trained on the motion and wave elevation data can significantly improve the motion prediction accuracy. This study validates the effectiveness and efficiency of the RC model in ship motion prediction during sailing and highlights the utility of wave elevation data in enhancing the RC model’s prediction accuracy.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 379-395"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141852060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 numerical model for stress relaxation analysis of sealing systems in nonbonded pipe end fittings 非粘结管端管件密封系统应力松弛分析的数值模型

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2023.10.001

Kunpeng Chen , Mengmeng Zhang , Shixiao Fu , Bing Zhao , Chunmiao Luo

{"title":"A numerical model for stress relaxation analysis of sealing systems in nonbonded pipe end fittings","authors":"Kunpeng Chen , Mengmeng Zhang , Shixiao Fu , Bing Zhao , Chunmiao Luo","doi":"10.1016/j.joes.2023.10.001","DOIUrl":"10.1016/j.joes.2023.10.001","url":null,"abstract":"<div><div>Nonbonded flexible pipes consist of polymer materials that experience stress relaxation at high temperatures, which ultimately affects the sealing performance of end sealing systems. To assess stress relaxation curves under varying temperatures and pre-strains, this paper conducts both tensile and stress relaxation tests on PVDF materials. To describe the stress relaxation characteristics of these materials, the Prony series is utilized. In order to identify the parameters of the series, the paper employs the Levenberg-Marquardt method of nonlinear regression. A finite element model is established to verify the accuracy of the parameter identification method. Subsequently, the paper establishes a two-dimensional axisymmetric finite element model of the sealing system in the end fitting, while taking into account fluid pressure inside the pipeline using a pressure penetration method. The impact of stress relaxation on the sealing performance is then discussed. Finally, the paper alters the coefficients of the Prony series to explore their significance on the sealing performance of the sealing system.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 308-321"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135761207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 advanced laboratorial measurement technique of scour topography based on the fusion method for 3D reconstruction 基于三维重建融合方法的先进冲刷地形实验室测量技术

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2023.12.002

Kan Huang , Xiaoni Wu , Zhiliang Lin

{"title":"An advanced laboratorial measurement technique of scour topography based on the fusion method for 3D reconstruction","authors":"Kan Huang , Xiaoni Wu , Zhiliang Lin","doi":"10.1016/j.joes.2023.12.002","DOIUrl":"10.1016/j.joes.2023.12.002","url":null,"abstract":"<div><div>Local scour is a phenomenon that occurs around water-blocking structures such as bridge piers, pile foundations, and pipelines, which threatens seriously the safety of structures. The laboratory test based on wave and flow tanks is an effective way investigating the local scour around piles. The measurement of scour depth and topography is an important basis for this type of experimental analysis, which can help the researchers to perform a quantitative analysis on the scour mechanism. The conventional measurement methods in scouring experiments have limitations in terms of operational efficiency, measurement range, and cost. Therefore, an advanced experimental measurement technique based on the RGB-D sensor and the 3D reconstruction algorithm was proposed in this work to provide the full topography information around target zone after scour. Experiments applying this 3D reconstruction method were conducted for the practical scour tests. The impact of water on the application of this technique was discussed as well. The results showed that the new technique has good accuracy in scour topography description and scour depth measurement. This work provides a new measure technique for laboratory scour tests. The proposed method has a broad application prospect in measurements for such experimental scenes.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 322-329"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138985988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Visual deep learning with physics constraints for local scour evolution prediction at monopiles 利用物理约束进行可视化深度学习，预测单桩局部冲刷演变情况

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2024.04.001

Bingjing Lu , Jingjing Zuo , Mohammad Shahhosseini , Hui Wang , Haichao Liu , Minxi Zhang , Guoliang Yu

{"title":"Visual deep learning with physics constraints for local scour evolution prediction at monopiles","authors":"Bingjing Lu , Jingjing Zuo , Mohammad Shahhosseini , Hui Wang , Haichao Liu , Minxi Zhang , Guoliang Yu","doi":"10.1016/j.joes.2024.04.001","DOIUrl":"10.1016/j.joes.2024.04.001","url":null,"abstract":"<div><div>Local scour threatens the safety of marine structures, necessitating the precise prediction of scour evolution around these structures. A visually oriented deep learning model, called Disentangled Physics-constrained Prediction (DPP), was proposed in this study to predict scour evolution at monopiles reliably. It integrates scouring physics with advanced video prediction techniques through a two-branch architecture. The Physics-constrained Recurrent Module (PRModule) branch leverages Recurrent Neural Networks (RNNs) for temporal differentiation, ensuring accurate prediction of scouring-related physical information. Meanwhile, the Convolutional Long-Short-Term Memory (ConvLSTM) branch captures spatial and temporal dynamics in scouring videos, focusing on the prediction of residual features. DPP outperformed three baseline models in predicting the scour evolution at monopiles. Across three scouring scenarios, DPP achieved a 14.2% decrease in Root Mean Squared Error, a 14.7% reduction in Mean Absolute Error, and an 8.1% increase in Structural Similarity on average, compared to the best-performing baseline model. The predicted scouring frames are found to agree well with the true frames, demonstrating DPP's potential as a valuable tool to protect marine infrastructures.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 342-352"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140779499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 study of the flow at a vertical pile with net-like scour protection matt 具有网状防冲matt的垂直桩流场数值研究

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2023.06.002

Minxi Zhang , Hanyan Zhao , Dongliang Zhao , Shaolin Yue , Huan Zhou , Xudong Zhao , Carlo Gualtieri , Guoliang Yu

{"title":"Numerical study of the flow at a vertical pile with net-like scour protection matt","authors":"Minxi Zhang , Hanyan Zhao , Dongliang Zhao , Shaolin Yue , Huan Zhou , Xudong Zhao , Carlo Gualtieri , Guoliang Yu","doi":"10.1016/j.joes.2023.06.002","DOIUrl":"10.1016/j.joes.2023.06.002","url":null,"abstract":"<div><div>Local scour at a pile or pier in current or wave environments threats the safety of the upper structure all over the world. The application of a net-like matt as a scour protection cover at the pile or pier was proposed. The matt weakens and diffuses the flow in the local scour pit and thus reduces local scour while enhances sediment deposition. Numerical simulations were carried out to investigate the flow at the pile covered by the matt. The simulation results were used to optimize the thickness <span><math><msub><mi>d</mi><mi>t</mi></msub></math></span> (2.6<span><math><mrow><msub><mi>d</mi><mn>95</mn></msub><mo>∼</mo><mn>17.9</mn><msub><mi>d</mi><mn>95</mn></msub></mrow></math></span>) and opening size <span><math><msub><mi>d</mi><mi>n</mi></msub></math></span> (<span><math><mrow><mn>7.7</mn><msub><mi>d</mi><mn>95</mn></msub><mo>∼</mo><mn>28.2</mn><msub><mi>d</mi><mn>95</mn></msub></mrow></math></span>) of the matt. It was found that the matt significantly reduced the local velocity and dissipated the vortex at the pile, substantially reduced the extent of local scour. The smaller the opening size of the matt, the more effective was the flow diffusion at the bed, and smaller bed shear stress was observed at the pile. For the flow conditions considered in this study, a matt with a relative thickness of <em>T</em> = 7.7 and relative opening size of <em>S</em> = 7.7 could be effective in scour protection.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 295-307"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43087195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Acoustic characterization of a cavitation tunnel for ship propeller noise studies 用于船舶螺旋桨噪声研究的空化隧道声学特性分析

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2024.02.001

J.A. Bocanegra , D. Borelli , T. Gaggero , R. Picó , G. Tani

{"title":"Acoustic characterization of a cavitation tunnel for ship propeller noise studies","authors":"J.A. Bocanegra , D. Borelli , T. Gaggero , R. Picó , G. Tani","doi":"10.1016/j.joes.2024.02.001","DOIUrl":"10.1016/j.joes.2024.02.001","url":null,"abstract":"<div><div>The noise radiated by ship propellers can be studied by analyzing scaled models in a cavitation tunnel. However, transferring the measurements made in the enclosed space of the tunnel to the expected values in a full-scale propeller (in a free field) presents a challenge for noise measurements. An acoustic characterization of the DITEN cavitation tunnel, including a study of normal modes and acoustic response to harmonic sources, is presented to understand the primary acoustic behaviour of the enclosure and its propagation characteristics. A three-dimensional numerical model was developed to simulate the DITEN Genoa University cavitation tunnel and evaluate the influence of elements such as a dynamometer, fins, impeller, and source position on the acoustic response of the tunnel. The study showed the influence of the mentioned elements on the acoustic response of the tunnel, and the numerical predictions were validated by comparing them with the experimental campaign in the low-mid frequency range. The study provides valuable insights into the behaviour of sound waves in a cavitation tunnel and the influence of various factors, which can help design and optimize cavitation tunnels and related experiments.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 330-341"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139892367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Large eddy simulation of plunging solitary wave: Understanding the breaking and turbulent mechanisms along shoaling region 骤降孤立波的大涡模拟：对浅水区破碎和湍流机制的理解

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2023.07.008

Abbasali Rahmani , Alireza Keramat , Jinghua Wang , Huan-Feng Duan

{"title":"Large eddy simulation of plunging solitary wave: Understanding the breaking and turbulent mechanisms along shoaling region","authors":"Abbasali Rahmani , Alireza Keramat , Jinghua Wang , Huan-Feng Duan","doi":"10.1016/j.joes.2023.07.008","DOIUrl":"10.1016/j.joes.2023.07.008","url":null,"abstract":"<div><div>A large eddy simulation (LES) is conducted to investigate the distribution of turbulence kinetic energy (TKE) under a plunging solitary wave over a 1:15 slope. This study provides a novel contribution to the field by examining the roles of resolved and sub-grid scale TKE in plunging solitary waves at the different stages of wave breaking. Furthermore, comparing the performances of two sub-grid scale (SGS) models in simulating the distribution of TKE was carried out to identify their performances. The separate investigation of these components in the context of wave breaking and recognizing the importance of an appropriate sub-grid scale model to consider the effects of small-scale eddies provide a significant advancement in understanding coastal morphological changes and nearshore sediment transport. Both the zero-equation and one-equation SGS models demonstrated acceptable performance in simulating water surface and kinematic properties. The one-equation SGS model, however, provided more accurate results on TKE transport during the breaking process and as the wave approaches its collapsing point. The study’s results reveal that an SGS model’s inability to simulate TKE transport (such as in the zero equation model) leads to inaccurate simulations of the TKE level and breaking location in the breaking zone. Additionally, the results of the one-equation model demonstrated that the maximum horizontal fluid velocity around the wavefront surface is a better predictor of breaking wave onset than the horizontal fluid velocity at the wave crest.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 366-378"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47549299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Dynamic responses of a twin-DP-barge float-over installation system with flexible connections 带柔性连接的双DP驳船浮渡安装系统的动态响应

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI: 10.1016/j.joes.2024.05.002

Rongze Wang , Quan Shi , Xinliang Tian , Xiaoxian Guo , Xin Li , Jianmin Yang

{"title":"Dynamic responses of a twin-DP-barge float-over installation system with flexible connections","authors":"Rongze Wang , Quan Shi , Xinliang Tian , Xiaoxian Guo , Xin Li , Jianmin Yang","doi":"10.1016/j.joes.2024.05.002","DOIUrl":"10.1016/j.joes.2024.05.002","url":null,"abstract":"<div><div>The twin-barge float-over technique, incorporating a dynamic positioning (DP) system, has been increasingly utilized to enhance the installation capacity and efficiency of offshore platforms. But the DP system is not fully considered during the design stage at present. This study investigates the dynamic responses of a twin-barge float-over system integrating flexible connections and DP system. A numerical model is developed and combined with model-scale experiments to analyze the characteristics of the system. The findings reveal the significant influence of the DP system on the coupled system, leading to harsh oscillations in the roll and heave directions. To effectively address this oscillation, a method with eigenmodes analysis and filter adjusting is proposed. The robustness of this method is verified through sensitivity analysis, and further investigation is conducted to analyze the motion response characteristics of the coupled system under varying environmental conditions. The findings and the proposed method in this paper are also applicable to various multi-vessel cooperative transportation scenarios.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 3","pages":"Pages 353-365"},"PeriodicalIF":13.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141395683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Sea trials vs prediction by numerical models—Uncertainties in the measurements and prediction of WASP performance 海上试验与数字模型预测--WASP 性能测量和预测的不确定性

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-04-01 DOI: 10.1016/j.joes.2024.05.001

Fabian Thies, Jonas W. Ringsberg

引用次数: 0

Vessel trajectory prediction with recurrent neural networks: An evaluation of datasets, features, and architectures 利用递归神经网络进行船舶轨迹预测：对数据集、特征和架构的评估

IF 13 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2025-04-01 DOI: 10.1016/j.joes.2024.01.002

Isaac Slaughter , Jagir Laxmichand Charla , Martin Siderius , John Lipor

{"title":"Vessel trajectory prediction with recurrent neural networks: An evaluation of datasets, features, and architectures","authors":"Isaac Slaughter , Jagir Laxmichand Charla , Martin Siderius , John Lipor","doi":"10.1016/j.joes.2024.01.002","DOIUrl":"10.1016/j.joes.2024.01.002","url":null,"abstract":"<div><div>Maritime situational awareness tasks such as port management, collision avoidance, and search-and-rescue missions rely on accurate knowledge of vessel locations. The availability of historical vessel trajectory data through the Automatic Identification System (AIS) has enabled the development of prediction methods, with a recent focus on trajectory prediction via recurrent neural networks (RNNs) and other deep learning architectures. While these methods have shown promising performance benefits over kinematic and clustering-based models, comparing among RNN-based models remains difficult due to variations in evaluation datasets, region sizes, vessel types, and numerous other design choices. As a result, it is not clear whether recent methods based on highly-sophisticated network architectures are necessary to achieve strong prediction performance. In this work, we present a simple fusion-based RNN approach to vessel trajectory prediction that allows for easy incorporation of exogenous variables. We perform an extensive ablation study to measure the impact of various modeling choices, including preprocessing, loss functions, and the choice of features, as well as the first usage of surface current information in vessel trajectory prediction. We demonstrate that our approach achieves state-of-the-art performance on three large regions off the United States coast, obtaining an improvement of up to 0.88 km over competing methods when predicting three hours into the future. We conclude that our simple architecture can outperform more complicated architectures while incurring a lower memory cost. Further, we show that the choice of loss function and the inclusion of surface current information both have significant impact on prediction performance.</div></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"10 2","pages":"Pages 229-238"},"PeriodicalIF":13.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139637147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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