Marine Structures最新文献_第8页

Influences of low velocity uniform current on characteristics of gap resonance occurring between two adjacent fixed bodies 低速均匀电流对相邻两固定体间隙共振特性的影响

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-11-04 DOI: 10.1016/j.marstruc.2025.103961

Junliang Gao , Yuntao Wu , Zhiwei Song , Ming He

{"title":"Influences of low velocity uniform current on characteristics of gap resonance occurring between two adjacent fixed bodies","authors":"Junliang Gao , Yuntao Wu , Zhiwei Song , Ming He","doi":"10.1016/j.marstruc.2025.103961","DOIUrl":"10.1016/j.marstruc.2025.103961","url":null,"abstract":"<div><div>Wave resonance phenomenon may occur in the narrow gap formed between adjacent marine structures, and the wave loads acting on the structures and the energy accumulated in the narrow gap may pose a huge threat to the safty operation of the structures. Via establishing a two-dimensional viscous wave-current flume based on the OpenFOAM® model, this article comprehensively investigates the influence of the direction and velocity of uniform current on the characteristics of gap resonance and the wave loads on the structures for a gap resonance system consisting of two fixed floating bodies. A wave analysis method based on the least squares principle is adopted to separate the incident and the reflected waves in the wave-current flume. The results show that both the following current and the opposing current increase the resonant frequency of the gap resonance. The opposing current increases the wave height amplification of the gap resonance system and the wave load on the structures, while the following current decreases them. In addition, the energy loss of the gap resonance system is slightly reduced by the following current, while the energy loss of the system is greatly increased by the opposing current.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103961"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465501","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 flowable solidified soil for scour protection of tripod suction bucket foundations in offshore wind farms 海上风电场三脚架吸力桶基础防冲流动固化土试验研究

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-10-23 DOI: 10.1016/j.marstruc.2025.103956

Youhai Guan , Kaixin Liang , Jincheng Hu , Huanyu Lv , Zhaohui Yang , Bo Wang , Meng Zhao , Shaojian Liu , Zhe Wang

{"title":"Experimental study on flowable solidified soil for scour protection of tripod suction bucket foundations in offshore wind farms","authors":"Youhai Guan , Kaixin Liang , Jincheng Hu , Huanyu Lv , Zhaohui Yang , Bo Wang , Meng Zhao , Shaojian Liu , Zhe Wang","doi":"10.1016/j.marstruc.2025.103956","DOIUrl":"10.1016/j.marstruc.2025.103956","url":null,"abstract":"<div><div>Local scour constitutes a critical threat to structural safety of offshore suction bucket foundations, while conventional countermeasures demonstrate constrained efficacy. To mitigate scour depths around suction bucket foundations, flowable stabilized soil (FSS) was applied to the upper seabed layer adjacent to structures. Flume experiments under steady current conditions were conducted to evaluate scour characteristics of tripod suction bucket foundations with versus without FSS protection. Results indicate that FSS exhibits significantly higher compressive and shear strength than natural seabed, characterized by densely compacted microstructure. Scour patterns for FSS under varied protection radii were categorized as \"joint erosion\" and \"surface erosion\". A correction coefficient for horseshoe vortex intensity was incorporated based on energy conservation theory, while the equilibrium scour depth formula was refined to account for FSS influences. Under identical conditions, FSS protection demonstrates superior efficiency relative to riprap and collar devices, with lower costs and simpler construction than grouting methods, empirically validating its enhanced scour mitigation capabilities.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103956"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362674","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 а unified theoretical model for ice load determination in ship - ice collisions considering ice crushing 考虑冰破碎的船冰碰撞冰载荷确定统一理论模型的建立

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-11-10 DOI: 10.1016/j.marstruc.2025.103965

Xinyan Yu , Bowen Zhao

{"title":"Development of а unified theoretical model for ice load determination in ship - ice collisions considering ice crushing","authors":"Xinyan Yu , Bowen Zhao","doi":"10.1016/j.marstruc.2025.103965","DOIUrl":"10.1016/j.marstruc.2025.103965","url":null,"abstract":"<div><div>Aiming to address the deficiencies of existing ship-ice collision theoretical models in characterizing ice failure mechanisms, construct complete impact processes, and unify ice load parameters, this paper establishes a unified theoretical model for ice load determination in ship-ice collisions considering ice crushing. A rigid body-ice layer interaction model is employed to describe the hull impact process, with oblique non-central asymmetric collisions simplified to central symmetric collisions through mass and velocity reduction coefficients, establishing momentum and angular momentum change equation sets. Combined with Reynolds equations describing viscoplastic fluid motion in the interlayer, an ice layer ultimate contact force coefficient is introduced to characterize the limiting effect of ice fracture on ice loads, constructing a unified calculation framework for contact pressure, line loads, resultant forces, and contact zone geometric parameters. Through structural strength curves and ice resistance strength surface concepts, the correlation between navigation condition parameters and structural design standards is established. Verification analysis using the “Lena” ice navigation vessel demonstrates that the model can effectively calculate ice load parameters under different ice thicknesses, navigation speeds, and structural design conditions, providing a theoretical foundation for bow structure design of various ice class transport vessels and achieving a unified calculation method for integrated ice load determination under multiple working conditions.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103965"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145528179","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

Local scour around a monopile using semiconical protection in a steady current 在稳定电流中使用半导体保护的单桩周围的局部冲刷

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-10-07 DOI: 10.1016/j.marstruc.2025.103952

Jinming Tu , Fan Yang , Donghua Liu , Yunsong Ji , Chengchao Guo , Fuming Wang

{"title":"Local scour around a monopile using semiconical protection in a steady current","authors":"Jinming Tu , Fan Yang , Donghua Liu , Yunsong Ji , Chengchao Guo , Fuming Wang","doi":"10.1016/j.marstruc.2025.103952","DOIUrl":"10.1016/j.marstruc.2025.103952","url":null,"abstract":"<div><div>Local scour around the semiconical structure of a monopile was systematically studied considering the side slope angle (<em>α</em> = 0°–60°), protruding height (<em>E/d</em> = 0–2), and flow intensity (clear-water or live-bed flow conditions). The three-dimensional scour profiles and features were meticulously explored using flow visualizations through large-eddy simulations. As the semiconical structure was buried in the seabed (<em>E/d</em> = 0), increasing side slope angle α from 0° to 60° reduced the maximum scour depth <em>S<sub>max</sub></em> by 53 % compared with the results of the monopile without the countermeasure. At <em>E/d</em> = 2, the maximum scour depth occurred at the downstream edge for <em>α</em> ≥ 30°, while the scour upstream was significantly diminished. <em>S<sub>max</sub></em> decreased significantly with an increase in <em>α</em>. At <em>α</em> = 60°, the reduction of <em>S<sub>max</sub></em> is up to 100 %. Vortex shedding also diminished owing to the semiconical structure. An increase in <em>E</em> led to a reduction in <em>S<sub>max</sub></em>, while the flow intensity had a limited impact. An equation for predicting scour-protection efficiency was derived from experimental results; it shows good predictive performance, with errors within 20 %.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103952"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266949","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

Artificial neural network model to assist in design of ship stiffened plates considering ultimate strength 考虑极限强度的船舶加筋板设计中的人工神经网络模型

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-09-11 DOI: 10.1016/j.marstruc.2025.103939

Im-jun Ban , Sang-jin Oh , Minjoon Kim , Jeong-Hyeon Kim , Sung-chul Shin

{"title":"Artificial neural network model to assist in design of ship stiffened plates considering ultimate strength","authors":"Im-jun Ban , Sang-jin Oh , Minjoon Kim , Jeong-Hyeon Kim , Sung-chul Shin","doi":"10.1016/j.marstruc.2025.103939","DOIUrl":"10.1016/j.marstruc.2025.103939","url":null,"abstract":"<div><div>The ship structure is exposed to combined loading conditions during operational exposure to waves due to the hull weight, cargo weight, and other loads. Because the primary structural members of the ship structure are stiffened plates, securing structural safety during the ship design stage is critical. However, in the current design method, the results are inaccurate and inefficient in terms of the required time or cost owing to the poor preparation of the physical model or assumptions regarding the boundary conditions. To resolve this, the present study performs a structural analysis on 3000 stiffened plates with included initial imperfections and subjected to axial compression, which causes the buckling loads on the ship. Deep learning database is constructed based on the finite element analysis results. Then, deep learning model is developed to propose an effective method for predicting the ultimate strength of the stiffened plates. The prediction results of the deep learning method showed similarity with the FE analysis results. During the initial design stage, the structural designer can use this model to determine the geometrical properties of the stiffened plate within a reasonable time and cost. In addition, these results can potentially be used in the reverse engineering of vessels.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103939"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046687","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

Ship bow impact force in head-on collision 船艏正面碰撞时的冲击力

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-09-12 DOI: 10.1016/j.marstruc.2025.103940

Shengming Zhang , Preben Terndrup Pedersen

引用次数: 0

Performance of small-scale offshore mudmat foundation under uplift and compression loading 近海小型泥滩基础在上拉和压缩荷载作用下的性能

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-09-04 DOI: 10.1016/j.marstruc.2025.103927

Daniel De Andrade Faria, Vinicius Batista Godoy, Fernando Schnaid, Lucas Festugato, Gustavo Dias Miguel

{"title":"Performance of small-scale offshore mudmat foundation under uplift and compression loading","authors":"Daniel De Andrade Faria, Vinicius Batista Godoy, Fernando Schnaid, Lucas Festugato, Gustavo Dias Miguel","doi":"10.1016/j.marstruc.2025.103927","DOIUrl":"10.1016/j.marstruc.2025.103927","url":null,"abstract":"<div><div>Oil and gas exploration infrastructure installed at the seabed must be decommissioned once the production activities are over. The present study aims to assess the seabed shallow foundation structures (mudmats) behavior by conducting small-scale model tests. These experiments focused on investigating the development of porewater pressure at the foundation base, identifying failure mechanisms, and assessing the influence of loading rate on uplift capacity of the foundation. The soil profile was characterized using one-dimensional consolidation tests, as well as small-scale vane shear, T-bar penetration, and ball penetration tests. Three test configurations were carried out: pullout extraction tests, foundation compression bearing capacity, and a combination between the two previous types. Stress–displacement and pore pressure–displacement curves for pull-out extraction tests were similar in shape but inversely proportional, which shows that suction contributes to sustaining the bond created between the soil and the mudmat foundation. Suction development was directly proportional to the test rate. These findings demonstrate that decommissioning processes must have adequate controls and avoid high-speed extractions rates. The outcomes of foundation compression bearing capacity tests indicated increases in stress and pore pressure corresponding to increases in loading rate. Foundation pull-out extraction after compression tests attained normalized displacement at the peak stress failure higher that the other test types.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103927"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989434","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

Gradient-based design optimization of semi-submersible floating wind turbines 基于梯度的半潜式浮式风力机设计优化

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-10-08 DOI: 10.1016/j.marstruc.2025.103951

Peter J. Rohrer , Erin E. Bachynski-Polić , John Marius Hegseth

{"title":"Gradient-based design optimization of semi-submersible floating wind turbines","authors":"Peter J. Rohrer , Erin E. Bachynski-Polić , John Marius Hegseth","doi":"10.1016/j.marstruc.2025.103951","DOIUrl":"10.1016/j.marstruc.2025.103951","url":null,"abstract":"<div><div>A wide variety of semi-submersible floating wind turbine designs have been proposed, though few studies have attempted design optimization with more than a handful of design variables. Gradient-based design optimization can enable optimization with many design variables to define the tower, substructure, and structural scantling design and allow for the inclusion of increasingly realistic design constraints based on ultimate and fatigue limit states of the structure. A surrogate-assisted optimization model centered around a linearized frequency-domain aero-hydro-servo-elastic model of a semi-submersible wind turbine was developed and applied to find optimal designs in three hypothetical locations. The optimal designs vary significantly based on the environmental conditions, and show the potential for significant cost-savings by employing site-specific design for floating wind turbines. For all of the hypothetical locations considered here, the tower design is driven by fatigue damage in near-rated wind speed conditions at the tower base and top, and buckling utilization in the rated-wind speed extreme condition for the remaining tower sections. The substructure design is driven by fatigue damage in near-rated wind speed conditions for the central column and above-rated wind speed conditions for the pontoons. Rules-based buckling constraints in the rated-wind speed condition drive the outer column and scantling design. The optimization model has also been used to investigate the impact of the bounds on tower design variables on the integrated tower-substructure structural design, and has the potential to be adapted to help answer a range of other concept-level design questions.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103951"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266947","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

A numerical study on flow-induced vibration of a buoy-mooring system 浮筒系泊系统流激振动的数值研究

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-11-26 DOI: 10.1016/j.marstruc.2025.103975

Hanxu Zheng , Mingda Li , Jiasong Wang , Sai Zeng , Dongying Wang , Xiaoyang Hu

{"title":"A numerical study on flow-induced vibration of a buoy-mooring system","authors":"Hanxu Zheng , Mingda Li , Jiasong Wang , Sai Zeng , Dongying Wang , Xiaoyang Hu","doi":"10.1016/j.marstruc.2025.103975","DOIUrl":"10.1016/j.marstruc.2025.103975","url":null,"abstract":"<div><div>This study numerically investigates the Flow-Induced-Vibration (FIV) of a Buoy-Mooring System (BMS), with a particular emphasis on the hydrodynamic coupling between the mooring cable’s vortex-induced vibration (VIV) and the buoy’s vortex-induced motion (VIM). Simulations are conducted across a range of controlled inflow velocities to systematically analyze the time–frequency characteristics of the FIV responses, associated energy transfer mechanisms, and vortex formation patterns. Supplementary two-dimensional (2D) simulations are employed to validate key findings from the three-dimensional (3D) simulations. The system dynamics become VIM-dominant when the buoy undergoes significant oscillatory motion, leading to synchronized, low-frequency, large-amplitude displacements in both structural components. The substantial oscillation amplitude induced by the buoy’s VIM causes the cable to experience cross-flow CF oscillation flow, which in turn generates in-line (IL) vibration components at distinct frequencies. The high-frequency IL vibration component originates from the periodic shedding or sliding of vortex pairs attached to the cable, while a low-frequency IL component emerges exclusively under high-frequency CF oscillations, facilitated by enhanced vortex detachment and shortened CF oscillation cycles. Notably, a higher incoming flow velocity promote downstream advection of shed vortices and attenuates the low-frequency IL vibration component.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103975"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623035","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

Probabilistic demand models and analytical fragility quantification for ship hulls under ultimate bending conditions 船体在极限弯曲条件下的概率需求模型和分析脆性量化

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-09-24 DOI: 10.1016/j.marstruc.2025.103944

Aws Idris, Mohamed Soliman

{"title":"Probabilistic demand models and analytical fragility quantification for ship hulls under ultimate bending conditions","authors":"Aws Idris, Mohamed Soliman","doi":"10.1016/j.marstruc.2025.103944","DOIUrl":"10.1016/j.marstruc.2025.103944","url":null,"abstract":"<div><div>Fragility analysis is a key performance assessment approach that quantifies the structural performance under a wide spectrum of possible hazard intensities. Fragility profiles can be established for a particular vessel using simulation techniques. However, simulation-based fragility assessment of ship hulls is computationally intensive, and its applicability is limited to the investigated vessel. In contrast, analytical fragility models provide a computationally efficient alternative allowing for wider applicability to cover a particular class of vessels. This paper proposes a novel framework for developing analytical fragility profiles for hulls of a specific vessel class considering ultimate bending conditions. The framework includes the development of probabilistic demand models needed to estimate the statistical characteristics of the engineering demand parameters based on the ship main particulars and hazard intensity measures. Nonlinear regression analysis, using constrained nonlinear optimization algorithms, is conducted to estimate the parameters of the proposed models. The framework is demonstrated on tankers, where probabilistic demand measures for five double-hull tankers are quantified while accounting for uncertainties in the applied loads and their combination factors. The capacity thresholds, representing the maximum demand a vessel can withstand before reaching a specific damage state, are then quantified probabilistically. Analytical fragility profiles are then established and validated against simulation-based fragility results obtained using artificial neural network-assisted finite element simulation. The results show that the developed probabilistic demand models can effectively estimate the statistical descriptors of the demand measure, and the established framework provides a highly computationally efficient alternative to simulation-based fragility assessment.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"106 ","pages":"Article 103944"},"PeriodicalIF":5.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158750","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