Ocean Engineering最新文献_第3页

Scaled boundary finite element model-based Bayesian updating for subseabed shield tunnels utilizing distributed strain data

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-06 DOI: 10.1016/j.oceaneng.2025.120524

Fengyuan Yang, Minghao Li, Xinyue Su, Xin Feng

{"title":"Scaled boundary finite element model-based Bayesian updating for subseabed shield tunnels utilizing distributed strain data","authors":"Fengyuan Yang, Minghao Li, Xinyue Su, Xin Feng","doi":"10.1016/j.oceaneng.2025.120524","DOIUrl":"10.1016/j.oceaneng.2025.120524","url":null,"abstract":"<div><div>The structural state of subseabed shield tunnels presents significant uncertainties throughout their service life. Bayesian model updating provides a more accurate parameter estimation by effectively accounting for these uncertainties. However, the Markov Chain Monte Carlo (MCMC) simulation faces challenges of computational intensity and convergence issues. To address these challenges, a novel methodology based on the scaled boundary finite element model (SBFEM) is proposed to efficiently update the structural parameters of subseabed shield tunnels within the framework of Bayesian inference. The circumferential strains of the tunnel are obtained using distributed fiber optic sensor as measurements. The SBFEM allows for efficient simulation of the structural responses and is incorporated into MCMC simulations to derive the posterior distributions of model parameters. Validation results indicate that the computational time for the SBFEM is only 2.7 s, reflecting an efficiency improvement of 90.7% compared to conventional finite element models. The average discrepancies between the updated and actual values of the external loads, tunnel, and stratum elastic modulus are 3.8%, 2.1%, and 3.5%, respectively. This approach ensures analytical accuracy while addressing the high computational expenses associated with MCMC sampling. These findings contribute to a more precise and efficient assessment for the structural states of underground tunnels.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"323 ","pages":"Article 120524"},"PeriodicalIF":4.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369707","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

Simulation study on damage behavior of a shallow-buried Foundation bridge under combined action of flood scouring and heavy vehicle load

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-06 DOI: 10.1016/j.oceaneng.2025.120410

Tong Wu, Gangping Fan, Chuandong Dou, Xing Li, Chunyang Dou, Jian Che, Tianzhuo Wang, Jincheng Rao

{"title":"Simulation study on damage behavior of a shallow-buried Foundation bridge under combined action of flood scouring and heavy vehicle load","authors":"Tong Wu, Gangping Fan, Chuandong Dou, Xing Li, Chunyang Dou, Jian Che, Tianzhuo Wang, Jincheng Rao","doi":"10.1016/j.oceaneng.2025.120410","DOIUrl":"10.1016/j.oceaneng.2025.120410","url":null,"abstract":"<div><div>Due to the insufficient burial depth of shallow-buried foundation bridges, foundation voiding easily occurs during floods or rapid water flows. When heavy vehicles pass over these partially voided bridges, the stress state of the foundation deteriorates instantaneously, causing critical components to exceed their load-bearing capacity in a short period, leading to a chain reaction that results in the rapid collapse and overall failure of the bridge structure. Previous numerical simulations of bridge water damage often neglected the strong coupling between water flow, soil, and structure during the scouring process. This paper applies a fluid-solid coupling simulation modeling method for bridge damage behavior under scouring action to study the structural damage behavior of shallow-buried foundation bridges under the combined effects of flood scouring and heavy vehicle load. This method employs point cloud reverse engineering technology to solve the difficult problem of converting the complex scour morphology around the foundation under flood scouring into a structural model, and investigates the multi-hazard damage behavior of shallow-buried foundations by coupling extreme hydraulic effects on the pier surface and placing the most unfavorable heavy vehicle loads on the bridge deck.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"323 ","pages":"Article 120410"},"PeriodicalIF":4.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369623","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

Development of marine accident probability prediction model for pleasure boats using ship accident database in central part of Seto Inland Sea

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120460

Aogi Shintani , Naokazu Taniguchi , Yoshiyuki Nakayama , Takahiro Tanaka , Kunihiro Hamada

{"title":"Development of marine accident probability prediction model for pleasure boats using ship accident database in central part of Seto Inland Sea","authors":"Aogi Shintani , Naokazu Taniguchi , Yoshiyuki Nakayama , Takahiro Tanaka , Kunihiro Hamada","doi":"10.1016/j.oceaneng.2025.120460","DOIUrl":"10.1016/j.oceaneng.2025.120460","url":null,"abstract":"<div><div>Understanding future marine accident risks is a critical challenge for maritime safety. Approximately 50% of marine accidents in Japan involve pleasure boats (PBs), small ships used for marine leisure. Previous studies have primarily analyzed the causes and trends of marine accidents involving larger vessels. Effective maritime safety management requires predicting future accidents and identifying conditions that contribute to these incidents. This study developed a predictive model using Light Gradient Boosting Machine to estimate the monthly probability of PB marine accidents in the central part of the Seto Inland Sea, Japan's highest incidence area. The model utilized 2986 PB marine accidents (2005–2021), sea area characteristics, vessel traffic density, and weather conditions to learn patterns of marine accident occurrence for each approximately 10 nautical mile square. The prediction accuracy indicated that the results generally aligned with the actual incident rates. Additionally, the Shapley Additive exPlanation, an interpretation method for artificial intelligence models, reveals that in areas with a high predicted probability, the number of islands and vessel traffic density were the main crucial factors. The results of this study can effectively aid port authorities and rescue organizations in optimizing the season and area selection for safety activities and rescue vessel deployment.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120460"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343753","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

Motion prediction of semi-submersibles using time-frequency deep-learning model with input of incident waves

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120539

Yan Li , Yufeng Kou , Longfei Xiao , Deyu Li

{"title":"Motion prediction of semi-submersibles using time-frequency deep-learning model with input of incident waves","authors":"Yan Li , Yufeng Kou , Longfei Xiao , Deyu Li","doi":"10.1016/j.oceaneng.2025.120539","DOIUrl":"10.1016/j.oceaneng.2025.120539","url":null,"abstract":"<div><div>Machine learning techniques have inspired reduced-order solutions in hydrodynamic response prediction and hold the potential to provide valuable insights for structural design and real-time monitoring. In this study, to improve the feature extraction capability and interpretability, the time-frequency analysis methods were applied to the architectural design of deep learning model, and the incident waves were fed into the time-frequency (TF) model to predict the motions of semi-submersibles subjected to head waves. The training and testing datasets were derived from a scaled model test. Upon validation, the internal visualization demonstrated that the TF model can provide an accurate minute-level prediction with great interpretability. An in-depth analysis of time window selection was conducted to improve the model's performance and stability. Furthermore, multi-step predictions were systematically explored, successfully reconstructing the full 3-h motion time series with an average accuracy exceeding 90% for heave, pitch, and surge. The model's generalization ability was also evaluated under unfamiliar wave conditions and with limited training datasets. It is envisioned that the TF model could be a promising alternative to provide precise and rapid predictions of the hydrodynamic performance of offshore platforms.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120539"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167762","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

Experimental study on the combined effect of hydrogen storage tanks and ventilation grilles on the deflagration mechanism in hydrogen-powered ships

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120526

Boqiao Wang, Bin Zhang, Yuanchen Xia, Siqi Zhang, Zhuohui Liang, Wenbin Zhu, Ke Ye, Xuexing Fan, Ruilin Song

{"title":"Experimental study on the combined effect of hydrogen storage tanks and ventilation grilles on the deflagration mechanism in hydrogen-powered ships","authors":"Boqiao Wang, Bin Zhang, Yuanchen Xia, Siqi Zhang, Zhuohui Liang, Wenbin Zhu, Ke Ye, Xuexing Fan, Ruilin Song","doi":"10.1016/j.oceaneng.2025.120526","DOIUrl":"10.1016/j.oceaneng.2025.120526","url":null,"abstract":"<div><div>To explore the coupled effects of ventilation grille openings and hydrogen storage tank arrangements on the consequences of premixed hydrogen deflagration accidents, a semi-open 300 × 300 × 900 mm deflagration visualization platform was constructed. Experiments were conducted under varying conditions of hydrogen equivalence ratio, storage tank arrangement, obstacle-ignition distance, and grille opening angle. The experimental conclusions are as follows: when only with the grilles, Helmholtz oscillations occurred at a 0.3 equivalence ratio, while increasing the grille opening angle reduced internal peak overpressure (P<sub>int</sub>) at 0.4 and 0.5 equivalence ratios. As the equivalence ratio increases, high-frequency oscillation duration shortens. Only with hydrogen storage unit obstacles, the deflagration venting peak overpressure (P<sub>out</sub>) and three external peak overpressures (P<sub>ext1</sub>, P<sub>ext2</sub>, and P<sub>ext3</sub>) appear. Additionally, the flame propagation speed significantly increases. However, higher equivalence ratios, obstacle volume blockage ratios, and obstacle-ignition distance causes P<sub>ext2</sub> to disappear. Additionally, increasing the obstacle-ignition distance causes P<sub>out</sub> to rise initially and then fall. With both obstacles and grilles, P<sub>int</sub> occurs at a 0° opening angle, while P<sub>out</sub> decreases as grille opening angles increase (15°, 30°, and 45°). The results suggest that loosely arranging hydrogen storage tanks and maximizing the grilles opening angle can effectively reduce hydrogen deflagration consequences in the storage cabin.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120526"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167763","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

Flow-induced vibrations of a wake cylinder at a low mass-damping ratio

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120530

Jian Liu , Md. Mahbub Alam , Hongjun Zhu , Md Islam , Yu Zhou , Mostafa Zeinoddini

{"title":"Flow-induced vibrations of a wake cylinder at a low mass-damping ratio","authors":"Jian Liu , Md. Mahbub Alam , Hongjun Zhu , Md Islam , Yu Zhou , Mostafa Zeinoddini","doi":"10.1016/j.oceaneng.2025.120530","DOIUrl":"10.1016/j.oceaneng.2025.120530","url":null,"abstract":"<div><div>This study experimentally investigates flow-induced vibrations of an elastically mounted cylinder (diameter <em>D</em>) in a wake, at a low mass-damping ratio of <em>m</em>∗<em>ζ</em> = 0.163. This work focuses on the influence of reduced velocity <em>U</em><sub><em>r</em></sub> (= 1.51 − 16.82), streamwise spacing ratio <em>L/D</em> (= 2.0 − 6.0), and transverse spacing ratio <em>T/D</em> (= 0 − 3.0) between the cylinders on vibration responses, frequency responses, forces, added mass, and phase lag between lift and displacement. Five distinct vibration branches − initial branch (IB), upper branch (UB), lower branch (LB), desynchronized branch (DB), and galloping branch (GB) − are identified and discussed with respect to <em>T/D</em>, <em>L/D</em>, and <em>U</em><sub><em>r</em></sub> space. The cylinder undergoes combined vortex-induced vibration (VIV) and galloping for <em>T/D</em> < 0.37 − 0.75 (depending on <em>L/D</em>). At 0.37 − 0.75 < <em>T/D</em> < 1.75, where two wakes of different sizes are formed, galloping is absent, leaving strong VIV only in the vibrations. The added mass associated with the cylinder oscillation declines progressively from IB to GB with a rapid decrease in IB. The added mass is positive for IB and UB, but negative for LB and GB. The connection between vibration responses and flow structures around fixed cylinders is established.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120530"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167764","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

Effects of nozzle inner surface wear on the rock-breaking ability of premixed abrasive water jets

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120548

Xiaotian Wang, Zhaolong Ge, Qinglin Deng, Zhi Yao, Yuhuai Cui, Binbin Ge

引用次数: 0

A novel in-situ heading control strategy for the multi-mode underwater vehicle

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120529

Jian Fu , Hexiong Zhou , Wenjing Wu , Xu Zhang , Baoheng Yao , Lian Lian , Zhihua Mao

{"title":"A novel in-situ heading control strategy for the multi-mode underwater vehicle","authors":"Jian Fu , Hexiong Zhou , Wenjing Wu , Xu Zhang , Baoheng Yao , Lian Lian , Zhihua Mao","doi":"10.1016/j.oceaneng.2025.120529","DOIUrl":"10.1016/j.oceaneng.2025.120529","url":null,"abstract":"<div><div>This paper presents a multi-mode underwater vehicle (MUV) designed to enhance its maneuverability and adaptability for performing diverse tasks during ocean observation. The focus is on enhancing its in-situ maneuverability, particularly with respect to attitude transformation and heading adjustment. The study employs Lyapunov stability theory to assess the vehicle’s attitude stability. The analysis demonstrates that the roll and pitch angles are asymptotically stable, while the yaw angle is neutrally stable. The paper then proposes three control strategies — conventional, critical, and supercritical state reset control strategies — to improve heading adjustments. Simulations show the feasibility of these strategies, with the supercritical strategy achieving up to 150°of heading adjustment. Pool experiments further validate the effectiveness of the proposed strategies, particularly in in-situ heading adjustment. The work presents a novel approach to attitude control in underactuated MUV, with promising implications for enhancing the maneuverability of similar underwater platforms.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120529"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143360297","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

Design and laboratory validation of multistructured acoustic resonators for the attenuation of airborne machinery noise in ships

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120515

Mathis Vulliez , Giuseppe Catapane , Marc-André Guy , Kamal Kesour , Jean-Christophe Gauthier Marquis , Raphaël Jeanvoine , Frédéric La Madeleine , Kévin Verdière , Giuseppe Petrone , Olivier Robin

{"title":"Design and laboratory validation of multistructured acoustic resonators for the attenuation of airborne machinery noise in ships","authors":"Mathis Vulliez , Giuseppe Catapane , Marc-André Guy , Kamal Kesour , Jean-Christophe Gauthier Marquis , Raphaël Jeanvoine , Frédéric La Madeleine , Kévin Verdière , Giuseppe Petrone , Olivier Robin","doi":"10.1016/j.oceaneng.2025.120515","DOIUrl":"10.1016/j.oceaneng.2025.120515","url":null,"abstract":"<div><div>Ship machinery generates significant noise levels, mainly including energetic and low-frequency tonal components, posing two issues. The first is linked to potential health and safety problems related to onboard noise, mainly for the crew working in the engine room. The second concern is that the underwater noise generated by machinery can harm marine life. Conventional sound-absorbing materials are hardly efficient in mitigating low-frequency tonal components. This study introduces multistructured acoustic resonators for machinery noise attenuation. These resonators are based on either Helmholtz resonators, labyrinthine quarter wavelength tubes, or spiral quarter wavelength tubes embedded into a broadband soundproofing material. Design elements are provided for each resonator type, and their effectiveness in reducing machinery noise is evaluated using numerical simulations and tests primarily conducted using a low-frequency impedance tube and a reverberant room. The subsequent validation steps and perspectives are finally summarized.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120515"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multilayered depth-averaged formulation for immiscible gravity currents

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.oceaneng.2025.120452

Naveed Ul Hassan Bhat , Gourabananda Pahar

{"title":"Multilayered depth-averaged formulation for immiscible gravity currents","authors":"Naveed Ul Hassan Bhat , Gourabananda Pahar","doi":"10.1016/j.oceaneng.2025.120452","DOIUrl":"10.1016/j.oceaneng.2025.120452","url":null,"abstract":"<div><div>Lock exchange represents the progression of a gravity current caused by the instantaneous release of a heavy fluid into a lighter ambient fluid. The pressure gradient, on account of density difference, imparts motion of the current, leading to flow in the ambient fluid. Full-scale multiphase models (Eulerian/Lagrangian) have been developed to simulate these processes; however, they have substantial computational costs due to the specific nature of the models. On the contrary, the single/two-layered depth-averaged models are restricted by the range of density ratio owing to their simplified nature. In the current work a variable density multilayered shallow water model is developed to simulate the gravity current dynamics. The progression of the density front is delineated by a scalar transport equation, with the multilayered formulation offering a piecewise vertical variation of flow properties (velocity). The model is applied to the theoretical lake-at-rest condition, a set of lock exchange experimental scenarios and spreading of an oil spill over water surface. The model yields substantial agreement in computed and observed profiles of density current. Additionally, the model’s applicability to high-density gradients is explored through a representative case depicting the model’s capability for non-Boussinesq density graded flows.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"322 ","pages":"Article 120452"},"PeriodicalIF":4.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167765","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