Marine Structures最新文献_第4页

De-risking utilising a floating crane for floating offshore wind turbine maintenance 利用浮式起重机降低海上浮式风力涡轮机维护的风险

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-31 DOI: 10.1016/j.marstruc.2025.104000

Alastair Ramsay , Vahid Vaziri , Sean Snee , Marcin Kapitaniak

{"title":"De-risking utilising a floating crane for floating offshore wind turbine maintenance","authors":"Alastair Ramsay , Vahid Vaziri , Sean Snee , Marcin Kapitaniak","doi":"10.1016/j.marstruc.2025.104000","DOIUrl":"10.1016/j.marstruc.2025.104000","url":null,"abstract":"<div><div>The growing deployment of floating offshore wind turbines (FOWTs) presents new challenges in maintenance operations, particularly concerning in-situ component replacement. This study builds upon prior research into the feasibility of using a floating crane for generator exchange on a semi-submersible FOWT, specifically the UMaine VolturnUS-S supporting a 15 MW reference turbine. Utilising a marine simulation environment at NDC, the dynamic responses of the generator, nacelle, and crane barge were evaluated under various sea states. The results highlight that while generator accelerations are a significant operational factor, the primary constraint is the risk of collision between the generator and turbine structure during lifting operations. Parametric studies revealed critical wave periods that exacerbate generator motions and collisions, and while modifications to the lifting methodology proved ineffective, reorienting the crane barge parallel to incoming waves showed a modest reduction in collisions. These findings underline the importance of vessel selection, wave direction, and sea state limitations in ensuring the viability of in-situ maintenance using floating cranes for FOWTs.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104000"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884569","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

Sympathetic hydrostatic implosions and fluid-structure interaction of metallic cylinders in a semi-confined environment 半密闭环境中金属圆柱体的流体静力内爆与流固相互作用

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.marstruc.2026.104010

Bolaji Oladipo , Helio Matos , Arun Shukla , Sumanta Das

{"title":"Sympathetic hydrostatic implosions and fluid-structure interaction of metallic cylinders in a semi-confined environment","authors":"Bolaji Oladipo , Helio Matos , Arun Shukla , Sumanta Das","doi":"10.1016/j.marstruc.2026.104010","DOIUrl":"10.1016/j.marstruc.2026.104010","url":null,"abstract":"<div><div>This work develops an experimentally validated multi-faceted fluid–structure interaction (FSI) model using LS-DYNA to investigate sequential sympathetic implosion of metallic cylinders in semi-confined underwater environments. The numerical model was first validated using experiments in which sequentially arranged aluminum cylinders underwent hydrostatic collapse in a semi-confined chamber, with transient pressure sensors capturing key response metrics. Numerical simulations replicated the observed collapse sequence. They matched the dynamic pressure–time response in both magnitude and timing, reinforcing confidence in the accuracy and predictive capability of the FSI framework. Following this successful validation, a series of parametric studies was conducted by varying the secondary cylinder’s length-to-diameter (L/D) ratio to investigate its influence on sympathetic implosion dynamics, energy absorption, and pressure wave evolution. Results show that increasing the L/D ratio of the secondary cylinder from 4 to 6 leads to earlier sympathetic collapse, greater than 14 % increase in kinetic energy absorption, and strain energy surpassing that of the primary cylinder. Pressure recordings and FSI profiles reveal peak overpressures escalating by 10–15 %, fluid jet velocities doubling (from ∼65 to ∼130 m s<sup>-1</sup>), and more coherent pressure rebound patterns as slenderness increases. These findings reveal key relationships, including that higher L/D ratios accelerate energy transfer, amplify collapse intensity, and produce stronger, more focused pressure waves. Conversely, shorter cylinders exhibit delayed, impulsive collapse with reduced energy uptake. Overall, this work establishes a predictive framework for designing resilient clustered subsea systems by linking structural geometry, fluid–structure interaction, and shock dynamics to informed mitigation of cascading failure risks.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104010"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976618","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

Hydroelasticity effects on wave-induced loads for flexible slender components in offshore wind turbines 海上风力发电机柔性细长构件的水弹性对波浪诱导载荷的影响

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2026-01-16 DOI: 10.1016/j.marstruc.2026.104014

Qi Zhang, Ould el Moctar, Changqing Jiang

{"title":"Hydroelasticity effects on wave-induced loads for flexible slender components in offshore wind turbines","authors":"Qi Zhang, Ould el Moctar, Changqing Jiang","doi":"10.1016/j.marstruc.2026.104014","DOIUrl":"10.1016/j.marstruc.2026.104014","url":null,"abstract":"<div><div>Offshore wind turbines consist of slender cylindrical members whose fatigue and ultimate strength govern both structural safety and cost. Accurate design requires reliable prediction of wave–structure interactions, including hydroelastic effects, which are often neglected in traditional rigid-body or decoupled analyses. This study implements a fully coupled CFD-FEM framework to investigate hydroelastic responses of a top-fixed flexible cylinder, representative of offshore wind turbine foundations. The framework combines a finite-volume Navier–Stokes solver with a nonlinear structural dynamics solver, validated against benchmark experiments for both rigid hydrodynamics and flexible structural behavior. Results demonstrate that structural flexibility fundamentally alters wave-induced loads, particularly when wave excitation frequencies approach the cylinder’s natural modes. Spectral analysis shows that rigid assumptions overpredict higher-order harmonics in short waves but underpredict key harmonics (2nd, 3rd) in long waves, leading to potentially non-conservative fatigue estimates. Increasing wave steepness amplifies nonlinear interactions and higher-order vibrations, which dominate fatigue-critical responses. These findings highlight the necessity of accounting for hydroelasticity in the design and lifetime assessment of offshore wind support structures to ensure both safety and cost efficiency.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104014"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976742","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

Shipbuilding workshop and storage yard scheduling: A literature review 造船车间与堆场调度：文献回顾

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-12 DOI: 10.1016/j.marstruc.2025.103988

Xuwen Jing, Chen Cheng, Jinfeng Liu, Shuting Yue, Su Li, Yu Chen, Yuhang Zuo, Pengcheng Qi

引用次数: 0

Soil deformation and seepage behavior during suction-assisted installation of compartmented bucket foundations 抽吸式桶形基础安装过程中土体变形与渗流特性

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-08 DOI: 10.1016/j.marstruc.2025.103983

Linlong Mu , Tao Zhou , Yimin Lu , Jianguo Sun , Guangming Yu

{"title":"Soil deformation and seepage behavior during suction-assisted installation of compartmented bucket foundations","authors":"Linlong Mu , Tao Zhou , Yimin Lu , Jianguo Sun , Guangming Yu","doi":"10.1016/j.marstruc.2025.103983","DOIUrl":"10.1016/j.marstruc.2025.103983","url":null,"abstract":"<div><div>The compartmented bucket foundation (CBF) is an innovative offshore wind turbine foundation that offers enhanced leveling control compared to traditional mono-bucket foundations. However, the soil deformation and seepage mechanisms during suction-assisted installation remain poorly understood. This study combines semi-model tests with particle image velocimetry (PIV) and three-dimensional finite element simulations to investigate soil displacement and seepage behavior under both uniform and non-uniform suction conditions. The physical tests reveal asymmetric soil plug development between side and central compartments, with external soil inflow becoming dominant in side chambers at deeper penetration stages. Seepage field analysis shows concentrated hydraulic gradients near the bucket toes and higher pore water velocities in the side chambers. The finite element model captures the evolution of excess pore pressure and provides critical suction estimates that agree with experimental trends. Simultaneous leveling suction in multiple chambers increases the critical suction by 27.8% compared to single-chamber suction. These results advance the understanding of soil–structure interaction in CBF installation and offer guidance for safe and efficient offshore wind foundation design.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103983"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748762","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

Hydroelastic response of a floating flexible platform under oblique wave-current interaction 斜波流作用下浮动柔性平台的水弹性响应

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-18 DOI: 10.1016/j.marstruc.2025.103990

P. Amouzadrad, S.C. Mohapatra, C. Guedes Soares

{"title":"Hydroelastic response of a floating flexible platform under oblique wave-current interaction","authors":"P. Amouzadrad, S.C. Mohapatra, C. Guedes Soares","doi":"10.1016/j.marstruc.2025.103990","DOIUrl":"10.1016/j.marstruc.2025.103990","url":null,"abstract":"<div><div>An analytical model of oblique wave-current interaction with a moored, floating, flexible structure is developed based on the Timoshenko-Mindlin beam theory, assuming small-amplitude wave theory and small structural response. Theoretical solutions for the hydrodynamic coefficients, reflection and transmission coefficients, and structural displacements are calculated by applying the matching technique in conjunction with the orthogonal mode-coupling relation. The analytical results for structural displacements are compared with independent numerical simulations using a BEM code and with experimental data sets available in the open literature. Furthermore, the hydroelastic response for different design parameters, as well as structural displacements, shear force, bending moment, and hydrodynamic coefficients, is analysed using analytical solutions. Meanwhile, contour plots of the transmission wave amplitudes around the structure are generated using numerical methods. The comparison results show that both the numerical model results and the experimental data sets support the present model's findings. This analysis may be helpful in providing a better understanding of the parameters for designing a floating flexible platform in the marine environment.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103990"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797299","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 optimization of an autonomous catamaran for water surface cleaning 用于水面清洁的自主双体船设计与优化

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-29 DOI: 10.1016/j.marstruc.2025.103995

Rinor Lubovci , İlyas Kacar

{"title":"Design and optimization of an autonomous catamaran for water surface cleaning","authors":"Rinor Lubovci , İlyas Kacar","doi":"10.1016/j.marstruc.2025.103995","DOIUrl":"10.1016/j.marstruc.2025.103995","url":null,"abstract":"<div><div>An autonomous catamaran is designed, optimized, and implemented. Its structural parameters are optimized to achieve a cost-effective operating and a lightweight and safe structure. An optimization technique based on the genetic algorithm method and finite element simulation are employed. Besides, computational fluid dynamics is utilized to determine the hydromechanics characteristics of the catamaran. Lastly, the response to random vibrations is investigated. Due to industrialization in recent years, environmental degradation has become one of the main issues for the world. Regulations are the only protection mechanism against this issue, but they are not enough yet. In addition, present water surface cleaning techniques are far from autonomy and low energy consumption. The proposed design has lightweight structure with lower energy consumption, making it suitable for autonomous operations. By integrating computational fluid dynamics simulation, genetic algorithms, random vibration analysis, and structural optimization, this study presents a novel approach that improves energy efficiency and operational stability, addressing gaps in existing autonomous water-cleaning technologies. The findings indicate that the catamaran operates safely for lifting 350.75 N. It holds potential for various applications, including marine, area near moored ferries, and trading ports with high human population and pollution levels.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103995"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884570","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

Novel foundation system for high capacity wind turbine: Experimental and numerical study 新型大容量风力机基础系统：试验与数值研究

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-11 DOI: 10.1016/j.marstruc.2025.103987

Babita Sah, Sridhar Gangaputhiran

{"title":"Novel foundation system for high capacity wind turbine: Experimental and numerical study","authors":"Babita Sah, Sridhar Gangaputhiran","doi":"10.1016/j.marstruc.2025.103987","DOIUrl":"10.1016/j.marstruc.2025.103987","url":null,"abstract":"<div><div>Growing energy demand necessitates offshore wind energy expansion, requiring strong foundation for high-capacity turbines. This paper presents a novel and innovative Monopile-Plate Foundation (MPF) for next generation high capacity offshore wind turbines. MPF consists of a plate, attached to the conventional monopile at the mudline. A series of physical model tests were conducted to determine its effectiveness by comparing ultimate lateral load carrying capacity of Conventional Monopile Foundation (CMF) and MPF. In the present study, offshore 5 MW baseline wind turbine from National Renewable Energy Laboratory (NREL), is selected as a prototype. The results demonstrate MPF’s increased lateral load capacity by 32 %; and reduced lateral displacement by 47.1 %. Numerical simulation was done to elucidate the mechanism. MPF reduced the deflection, shear force and bending moment by 52 %, 29 % and 4.2 %, respectively, under the maximum lateral load capacity of the CMF. Parametric studies were also performed to optimize MPF’s plate diameter and thickness. The influence of lateral load eccentricity was examined, showing enhancement in MPF’s capacity by at least 21 % in any case. The impact of varying soil conditions, including single, two- and three-layered soil were investigated; and was observed that lateral load carrying capacity of MPF was higher than that of CMF.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103987"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748764","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

Reliability analysis of monopile foundations of offshore wind turbines with multi-source Bayesian updating 基于多源贝叶斯更新的海上风力机单桩基础可靠性分析

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2025-12-26 DOI: 10.1016/j.marstruc.2025.103997

Felipe Giro, Philippe Rigo

{"title":"Reliability analysis of monopile foundations of offshore wind turbines with multi-source Bayesian updating","authors":"Felipe Giro, Philippe Rigo","doi":"10.1016/j.marstruc.2025.103997","DOIUrl":"10.1016/j.marstruc.2025.103997","url":null,"abstract":"<div><div>Fatigue reliability assessment of offshore wind monopile foundations is commonly performed at the component level, often neglecting system-level statistical dependence among fatigue-critical details. This simplification leads to conservative designs and limits the effective use of inspection information, particularly for components that cannot be directly inspected. Only a limited number of Bayesian updating frameworks have been proposed to address system effects, and these typically rely on assumptions that complicate the modeling of system-level correlations or on simplifications that reduce model accuracy. This paper proposes a multi-level Bayesian updating scheme (mBUS) as an alternative framework for system-level fatigue reliability assessment of monopile foundations. The method represents statistical dependence through physical, time-invariant parameters and incorporates inspection outcomes via a virtual observation mechanism, enabling system-level updating without optimization-based coupling and with linear computational scaling. The framework is demonstrated on a monopile supporting an offshore wind turbine, considering multiple circumferential welds subjected to fatigue loading. Results illustrate that accounting for system-level correlation leads to a stronger reduction of epistemic uncertainty in the deterioration model. For inspection scenarios with non-detection of cracks, this uncertainty reduction results in lower posterior probabilities of failure and increased estimates of remaining useful life for both inspected and uninspected components. From a design and decision-making perspective, the proposed approach supports less conservative fatigue design assumptions, such as design fatigue factors (DFF), while maintaining target safety levels.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103997"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839886","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

Influence of low transformation temperature welds on stress concentration at the weld root of multi-pass butt-welded joints 低温焊接对多道次对接焊接接头焊缝根部应力集中的影响

IF 5.1 2区工程技术

Marine Structures Pub Date : 2026-03-15 Epub Date: 2026-01-11 DOI: 10.1016/j.marstruc.2026.104009

Ramy Gadallah, Masakazu Shibahara

{"title":"Influence of low transformation temperature welds on stress concentration at the weld root of multi-pass butt-welded joints","authors":"Ramy Gadallah, Masakazu Shibahara","doi":"10.1016/j.marstruc.2026.104009","DOIUrl":"10.1016/j.marstruc.2026.104009","url":null,"abstract":"<div><div>Local weld geometry is a critical factor that strongly influences the fatigue behavior of welded joints. The stress concentration factor (SCF) is a key parameter that quantifies the notch effect caused by such geometry. This study numerically investigates the combined influence of multi-pass welding and phase-transformation-induced welding residual stress (WRS) on SCF behavior at the weld root of butt-welded joints, with particular emphasis on the role of low transformation temperature (LTT) weld material. WRS distributions were simulated for different welding scenarios, including partial and full LTT welds, with a fully conventional multi-pass weld included for comparison. The SCF along the weld root was then evaluated under a range of nominal stress levels by incorporating the WRS from each scenario. The results show that LTT weld material effectively reduced tensile longitudinal WRS at the weld root but introduced unfavorable tensile transverse WRS in and around the root region. Among the investigated cases, the full LTT multi-pass welds provided the greatest benefit, significantly reducing the SCF compared with the full conventional welds, particularly at lower stress levels. In contrast, partial LTT welds placed at the weld root did not yield comparable SCF reductions. The findings indicate that to maximize the benefit of LTT welds, the primary service loading should not be aligned with the unfavorable transverse WRS component. The role of WRS in the evaluated SCF was also quantified and discussed to support the study findings.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104009"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976741","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