Marine Structures最新文献

{"title":"Framework for the assessment of ship hull girder reliability and related sensitivity analysis considering accidental damage and ageing","authors":"Krzysztof Woloszyk ,&nbsp;Jakub Montewka ,&nbsp;Floris Goerlandt ,&nbsp;Bruno Sudret","doi":"10.1016/j.marstruc.2025.103986","DOIUrl":"10.1016/j.marstruc.2025.103986","url":null,"abstract":"<div><div>The present study proposes a comprehensive framework for assessing the reliability of a ship hull girder and its sensitivity to key input variables, with particular consideration of accidental hull damage and age-related corrosion. To this end, the physics-based model used to compute the ultimate strength is substituted with a surrogate model based on Polynomial Chaos Expansion. The reliability problem is formulated by incorporating both still-water and wave-induced bending loads. The effects of various parameters, including vessel age (which is associated with corrosion progression), operational region, loading condition, and accidental damage, are systematically examined. The analysis reveals that ship size, operational region, and the specific damage scenario significantly influence the probability of hull failure, thereby highlighting the need for further investigation. The proposed framework offers potential application in risk-based ship design.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103986"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694701","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}

{"title":"Quantitative evaluation method for uniaxial consolidated bearing capacity of composite bucket foundation under vertical dead load","authors":"Qingxin Li ,&nbsp;Guangsi Chen ,&nbsp;Jijian Lian ,&nbsp;Run Liu ,&nbsp;Huaicheng Liu","doi":"10.1016/j.marstruc.2025.103999","DOIUrl":"10.1016/j.marstruc.2025.103999","url":null,"abstract":"<div><div>Offshore wind turbines are subjected to long-term vertical deadweight load during service life. Before experiencing extreme conditions, the vertical dead load accelerates the drainage and consolidation of the ground, leading to strength enhancement of the soil. This paper quantitatively evaluates the effects of vertical dead load on the uniaxial consolidated bearing capacity of composite bucket foundations. First, centrifuge tests are conducted on the torsional consolidated bearing capacity of composite bucket foundations, and then a finite element model is established. Significant differences in consolidated bearing characteristics among the composite bucket foundation, shallow foundation and mono-bucket foundation are revealed. The necessity to investigate the bearing characteristics of composite bucket foundation affected by soil consolidation is clarified. Next, a framework is established as a unified analysis tool for calculating the different uniaxial consolidated bearing capacities of composite bucket foundations. Considering changes in bearing mechanism, theoretical prediction formulae for uniaxial consolidated bearing capacity are proposed for the first time. Finally, the development of partially consolidated bearing capacity over time is analysed, and the influence of key factors on partially consolidated bearing capacity is evaluated. The simulation results indicate the proposed methods can effectively evaluate the gain of consolidation effect caused by vertical dead load on the uniaxial bearing capacity, and provide practical design guidance for consolidation engineering of composite bucket foundations under vertical dead load.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103999"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839971","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}

{"title":"On seabed scour around the vertical-axis tidal turbine under unidirectional flow loading","authors":"Hao Chen ,&nbsp;Jisheng Zhang ,&nbsp;Jianjian Zhao ,&nbsp;Yu Zhang ,&nbsp;Yakun Guo ,&nbsp;Hao Hu ,&nbsp;Yiming Ji ,&nbsp;Yanhong Wang","doi":"10.1016/j.marstruc.2026.104007","DOIUrl":"10.1016/j.marstruc.2026.104007","url":null,"abstract":"<div><div>The continuous development of clean energy and the growing demand for environmentally friendly power generation have made vertical-axis tidal turbines an important choice. These turbines have advantages because they can adapt to complex marine flow environments and areas with a wide range of flow velocity. Operational safety of the tidal stream energy system is important in the development of tidal energy, while tidal flow induced scour around the vertical-axis tidal turbine is one of factors causing the instability of the system. To this end, physical laboratory experiments are conducted in this study to evaluate the influences of flow intensity, tip clearance, tip speed ratio and water depth on the scour evolution around the tidal stream energy system foundation. The equilibrium scour topography is analyzed. The impact of the turbine rotor operation on the foundation erosion is examined by comparing the scour topography around the monopile foundation without turbine structure. Results show that the maximum scour depth and the scour extent around the foundation increase with the increase of flow intensity and tip speed ratio, but decrease with the increase of tip clearance and water depth. It is found that the rotor rotation significantly enhances sediment transport and scour around the foundation.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104007"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938793","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}

{"title":"Effect of honeycomb shape and parameters on specific energy absorption of aluminium honeycomb sandwich composites","authors":"Arun Rajput ,&nbsp;Harikrishna Chavhan","doi":"10.1016/j.marstruc.2025.104005","DOIUrl":"10.1016/j.marstruc.2025.104005","url":null,"abstract":"<div><div>The elastic properties of honeycomb structures are determined by the foil thickness (FT) and cell size (CS), which significantly influence their mechanical behavior. In present study, comparison of energy absorption capacity and specific energy absorption of different shapes of honeycombs (Hexagonal, Square and Triangular) sandwich composites has been presented. Initially, experiments were performed on a pair of hexagonal honeycomb sandwich composites using a Charpy impact testing machine in accordance with ASTM E23 standards. The experimental results were validated through numerical simulations conducted using the commercially available software Abaqus, showing good agreement. Subsequently, numerical simulations were extended to various honeycomb sandwich structure geometries. Energy absorption and specific energy absorption (SEA) values were extracted at the time steps corresponding to the detachment of the specimen from the supports. A comparison of the energy absorbed by different honeycomb shapes was carried out. Furthermore, the influence of FT, CS, and core height (CH) on the SEA of various honeycomb geometries was examined through detailed numerical analysis.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104005"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938794","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}

{"title":"Effect of members and local joints flexibilities on the dynamic and fatigue response of semi-submersible platforms for floating offshore wind turbines","authors":"Osunna Paul Dike,&nbsp;Vahid Vaziri,&nbsp;Marcin Kapitaniak","doi":"10.1016/j.marstruc.2025.103993","DOIUrl":"10.1016/j.marstruc.2025.103993","url":null,"abstract":"<div><div>This study investigates the effects of member and local joint flexibilities on the response of a semi-submersible floating offshore wind turbine (FOWT) by carrying out fully coupled nonlinear time-domain aero-hydro-servo-elastic dynamic analysis of the OC4 floater. Rigid body models and flexible models of the OC4 semi-submersible floater, supporting the NREL 5MW wind turbine, are used to perform this study. A total of four unique models of the FOWT system were developed and these include a model with a rigid body floater (M1), a flexible floater with each OC4 column modelled as separate rigid bodies connected by flexible braces (M2), and a flexible floater with local joint flexibilities explicitly introduced at inter-member connections to capture joint-level deformation (M3). The fourth is a parametric sensitivity model, derived from the previous one, where the rotational stiffnesses of the floater joints are systematically increased to assess their influence on the system dynamics as validation for M2. Decay tests were first carried out on all 4 models, to ascertain their characteristic modal behaviour, then fully coupled dynamic simulations were carried out for all the models. Analysis was performed for cases of regular wave only, random wave only, regular wave plus steady-state wind, and random wave plus turbulent wind. The global and local response of the FOWT system is then investigated. Results show that floater flexibility modifies the platform pitch natural period by about 10%. The surge and heave natural periods are, however, minimally affected. Platform flexibility also significantly affects the local response of floater braces (pontoons), the tower base loads and tower top kinematics, with implications for both design optimisation and performance forecasting in next-generation FOWT systems. Fatigue analysis of the tower base and selected brace connections reveal that fatigue damage is overpredicted at the tower base when the platform is modelled as a rigid floater, leading to a conservative (underestimated) fatigue life by approximately 50%, while fatigue damage is substantially underpredicted up to about 80% in the pontoon braces when the platform is modelled as rigid.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103993"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839888","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}

{"title":"Influence of ship manoeuvres on collision damage","authors":"Šimun Sviličić,&nbsp;Smiljko Rudan,&nbsp;Ivan Ćatipović,&nbsp;Jerolim Andrić","doi":"10.1016/j.marstruc.2025.103971","DOIUrl":"10.1016/j.marstruc.2025.103971","url":null,"abstract":"<div><div>Ship collisions, though infrequent, can result in severe consequences, including the loss of human life, ships, or cargo, as well as substantial environmental damage. This paper presents a comprehensive study of ship collision phenomena by analysing two key aspects: pre-collision manoeuvres under different rudder angles and comparative collision scenarios involving varying parameters such as impact angle and ship velocity. The study begins by examining various manoeuvres a ship can perform to minimise the risk of collision, taking into account positional and hydrodynamic factors. The second part of the study evaluates collision scenarios through a risk assessment framework, contrasting a high-risk collision scenario with a low-risk scenario, both modelled under the assumption of human error. Both analyses use rotational velocity and acceleration metrics derived from a three-degrees-of-freedom (3DOF) manoeuvrability model established in the first part. Simulations are conducted using LS-DYNA. The model incorporates hydrodynamic forces generated during the collision, as well as forces resulting from ship manoeuvring. The KVLCC2 serves as a case study, with its hydrodynamic properties - such as added mass and viscous damping, determined using Hydrostar software for integration into the Mitsubishi Collision Code (MCOL) boundary condition. The results indicate that large rudder angles (±40°) significantly reduce collision energy and penetration depth compared to no manoeuvre, while higher collision angles also mitigate structural deformation. The findings confirm that incorporating manoeuvrability into collision simulations improves predictive accuracy and provides valuable insight for assessing ship safety and collision prevention strategies.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103971"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624800","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}

{"title":"Research on impact damage of ship crew with sitting posture","authors":"Wenqi Zhang ,&nbsp;Shenhe Zhang ,&nbsp;Zhifan Zhang ,&nbsp;Guiyong Zhang ,&nbsp;Ying Li","doi":"10.1016/j.marstruc.2025.103996","DOIUrl":"10.1016/j.marstruc.2025.103996","url":null,"abstract":"<div><div>Ships can suffer impact injuries when they are impacted by underwater explosions. Currently, the impact injury studies of seated crew members are mostly focused on lumbar-pelvic and neck whiplash injuries, and there is a lack of analysis of secondary collision injuries in the absence of seatbelt restraints. In this paper, an impact injury analysis of seated shipmates was carried out based on a multibody dynamics human model, and the accuracy of the model was verified by experimental comparison. Head Injury Criterion (HIC), Neck Injury (NIJ), Dynamic Response Index (DRI) and other injury guidelines were used to evaluate the impact damage in various parts of the human body. Sensitivity analysis was conducted for two parameters, namely impact factor and angle of attack, comparing the damage patterns of the human body with and without seat belt restraints. The results showed that the crew with a seatbelt produced a four-cycle whiplash motion, and the crew without a seatbelt would produce three phases: flight phase, deck-head collision phase, and deck-torso collision phase. These findings can guide the development of impact injury protection strategies for shipmates.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103996"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884568","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}

{"title":"Experimental and numerical analysis of critical buckling strength for a corrugated sheet under hydrostatic pressure","authors":"Shi Guijie ,&nbsp;Cao Jiajun ,&nbsp;Gao Dawei ,&nbsp;Wan Zhong ,&nbsp;Wang Deyu","doi":"10.1016/j.marstruc.2026.104012","DOIUrl":"10.1016/j.marstruc.2026.104012","url":null,"abstract":"<div><div>Membrane-type corrugated sheets have been used as the primary barriers for LNG carriers to reduce thermal and mechanical stress level. A small failure in primary barrier could cause severe leakage consequences. As the ship capacity increases, the action loads on the primary barrier also rise, making the corrugated sheets more prone to structural failure. This paper focuses on the buckling strength of a corrugated sheet under hydrostatic pressure. In this research, a series of symmetric and asymmetric hydrostatic pressure tests were carried out on a new type of corrugated sheets. Displacement, strain, and hydrostatic pressure were measured to provide comprehensive data on the weak parts of the corrugated sheet. Three-dimensional scanning revealed the deformation mode of the specimens after the test. FEM simulations were conducted to analyze the Mises stress distribution on the midspan section. Six different buckling criteria are defined, differing in physical quantity and buckling point selection. Their advantages, disadvantages, and applicability are discussed, providing the estimation of critical buckling strength from conservative to radical.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104012"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976619","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}

{"title":"Low-velocity impact responses of welded aluminum alloy structures: experiment and simulation","authors":"Yue Lu,&nbsp;Shuai Zong,&nbsp;Kun Liu,&nbsp;Zili Wang","doi":"10.1016/j.marstruc.2025.103989","DOIUrl":"10.1016/j.marstruc.2025.103989","url":null,"abstract":"<div><div>This study experimentally and numerically investigates the dynamic responses of AA6061-T6 aluminum alloy structures with different welding configurations under impact loading. Material tests are conducted to obtain mechanical properties of welding-affected regions, and detailed numerical inputs incorporating dynamic parameters are provided. Three different specimens are designed based on a 42 m aluminum passenger catamaran, and the impact responses of unwelded and welded aluminum structures are compared and analyzed. Finite element simulations of the impact tests are performed, and constitutive models with strain rate and thermal softening effects are developed. By comparison of the experimental and numerical results, numerical techniques developed in the present study are validated, and the influence of weld configuration on damage characteristics and energy absorption is revealed. Finally, the evolution of strain rate and temperature in failed elements is examined under varying impact energy levels to further elucidate the dynamic characteristics of welded aluminum plates under impact loads.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103989"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797298","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}

{"title":"Study of damaged and transient effects of the grand trine shared mooring system for floating offshore wind farms","authors":"Chenyu Wang,&nbsp;Fulian Li ,&nbsp;Binbin Li","doi":"10.1016/j.marstruc.2025.104001","DOIUrl":"10.1016/j.marstruc.2025.104001","url":null,"abstract":"<div><div>The growing demand for renewable energy has driven focus toward floating offshore wind turbines (FOWTs), although their economic viability remains hindered by high costs. While shared mooring designs employ shared lines among multiple FOWTs as a coupled multibody system, their safety redundancy under extreme conditions, including mooring line failure scenarios, still requires extensive validations. This study aims to evaluate the dynamic behaviors of a grand trine shared mooring system for floating offshore wind farms under mooring line failure scenarios in 50-year return period storm conditions. Both damaged and transient analyses are conducted for a 3-FOWT grand trine shared mooring floating offshore wind farm in different mooring line failure scenarios by the in-house software Kraken to investigate the dynamic behaviors and transient effects. Results indicate the failure of a shared mooring line significantly affects the offset and line tension of the connected FOWTs, while having a minimal impact on other FOWTs unconnected with the shared line. The FOWT motions exhibit significant transient effects when the line failure deviates from the environmental load direction, while mooring line tensions exhibit negligible transient effects. The static and dynamic tension of shared lines in failure scenarios is significantly lower than upstream anchored lines, which exhibit minimal differences compared to those in intact conditions.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104001"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884567","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}