Marine Structures最新文献_第3页

Numerical study of wave forces on truncated cylinder arrays generated by focused waves 聚焦波对截短圆柱阵列波浪力的数值研究

IF 5.1 2区工程技术

Marine Structures Pub Date : 2025-08-05 DOI: 10.1016/j.marstruc.2025.103907

Qinghe Fang , Hui Wang , Hanchen Zhang , Chunhui Liu , Yongfu Wu , Zaixian Chen , Anxin Guo

{"title":"Numerical study of wave forces on truncated cylinder arrays generated by focused waves","authors":"Qinghe Fang , Hui Wang , Hanchen Zhang , Chunhui Liu , Yongfu Wu , Zaixian Chen , Anxin Guo","doi":"10.1016/j.marstruc.2025.103907","DOIUrl":"10.1016/j.marstruc.2025.103907","url":null,"abstract":"<div><div>Vertical cylinders are commonly used as foundation supports in offshore engineering. Wave forces on a single cylinder have been widely studied and developed into methods for calculating wave loads. However, wave forces on truncated cylinder arrays, representing floating foundations, have been rarely investigated. In this study, the wave forces on truncated cylinder arrays in 2 × 2 and 4 × 4 configurations generated by focused waves were numerically studied. The numerical model was established with the volume of fluid (VOF) method and the <em>k-ω SST</em> turbulence model based on OpenFOAM. The model accuracy was validated against experimental data from literature. The array effect was discussed by comparing the characteristics of wave forces on truncated cylinders at different positions. It was found that there is a nonlinear relationship between wave forces on cylinder arrays and wave amplitude. The wave force distributions of cylinder arrays show strong symmetry relative to wave incidence, with minimal amplitude variations across columns, while enlarged arrays amplify phase modulation. Surrounding cylinders provide significant sheltering effects to inner cylinders. Besides, the spectra of wave force on truncated cylinders were modulated by the spectral characteristics of incident focused waves. An empirical prediction method based on peak wave frequency was proposed to estimate dimensionless wave forces and their spatial distribution within cylinder arrays. This study enhances the understanding of wave force distributions on cylinder arrays under extreme wave and provides valuable insights into structural design of offshore structures.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"105 ","pages":"Article 103907"},"PeriodicalIF":5.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772102","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 probabilistic framework for assessing vessel impact on bridges considering technical failures: insights from the Baltimore accident case study 考虑技术故障评估船舶对桥梁影响的概率框架：来自巴尔的摩事故案例研究的见解

IF 5.1 2区工程技术

Marine Structures Pub Date : 2025-08-05 DOI: 10.1016/j.marstruc.2025.103906

Lucjan Gucma , Milan Batista , Marko Perkovič

{"title":"A probabilistic framework for assessing vessel impact on bridges considering technical failures: insights from the Baltimore accident case study","authors":"Lucjan Gucma , Milan Batista , Marko Perkovič","doi":"10.1016/j.marstruc.2025.103906","DOIUrl":"10.1016/j.marstruc.2025.103906","url":null,"abstract":"<div><div>This article presents new probabilistic approach to assessing the risk of collisions between ships and bridges, focusing specifically on the incident involving the container ship Dali and the collapse of the Francis Scott Key Bridge in Baltimore. Current risk models are significantly limited, particularly given the evolution of navigation practices and the adoption of ultra-precise positioning systems. The proposed method enhances predictive capability by incorporating three categories of technical ship failure: loss of power supply, failure of the main engine, and malfunction of the steering gear. A simulation-based reconstruction of the Dali incident was conducted using the NTPro 6000 full-mission bridge simulator. This reconstruction forms the basis for an in-depth analysis of four critical components: (1) the probable technical cause(s) of the accident; (2) key stakeholders and influencing factors in the risk profile of ship-to-bridge interactions; (3) engineering and procedural options for mitigating bridge strike incidents; and (4) expert assessment of feasible preventive measures, particularly those available to maritime pilots. The study includes the results of a targeted survey of maritime professionals, including pilots and captains. The survey aimed to evaluate the effectiveness of current preventive protocols and to identify potential gaps in training, coordination, and technical response in emergency situations. The findings provide valuable insights into the dynamics of maritime accidents in confined waters and propose a structured approach to enhancing risk assessment methodologies through the use of realistic failure scenarios and expert-informed analysis.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"105 ","pages":"Article 103906"},"PeriodicalIF":5.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772218","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

Simplified ultimate strength estimation method of continuous stiffened panels under biaxial loads and lateral pressure 双轴载荷和侧压作用下连续加筋板极限强度的简化估算方法

IF 5.1 2区工程技术

Marine Structures Pub Date : 2025-07-29 DOI: 10.1016/j.marstruc.2025.103903

Kinya Ishibashi , Daisuke Shiomitsu , Minoru Harada , Masahiko Fujikubo

{"title":"Simplified ultimate strength estimation method of continuous stiffened panels under biaxial loads and lateral pressure","authors":"Kinya Ishibashi , Daisuke Shiomitsu , Minoru Harada , Masahiko Fujikubo","doi":"10.1016/j.marstruc.2025.103903","DOIUrl":"10.1016/j.marstruc.2025.103903","url":null,"abstract":"<div><div>A simplified method is proposed for estimating the ultimate strength of continuous stiffened panels subjected to combined longitudinal and transverse loads, as well as lateral pressure. For the more rational design of ship hull structures, it is essential to develop an estimation method with a solid physical basis. Previous methods have been developed theoretically, explicitly considering factors such as post-buckling and yielding behaviors in addition to initial deflection. However, these approaches often require numerical iterations, such as the Newton-Raphson method, to obtain the load-deflection relationships. In this study, analytical solutions are derived for the elastic post-buckling behaviors of stiffened panels, eliminating the need for numerical iterations; this enables the development of a simple yet practical method for estimating the ultimate strength. By observing and classifying the collapse behavior of stiffened panels through nonlinear finite element analysis (NLFEA), the ultimate strength can be predicted by assessing yielding at predefined locations corresponding to the identified collapse modes. The accuracy of the proposed method is validated through comparisons with NLFEA results.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"105 ","pages":"Article 103903"},"PeriodicalIF":5.1,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721908","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

Numerical analysis of extreme water slamming damage and residual strength of ring-stiffened columns of a semi-submersible floating offshore wind turbine 海上半潜式浮式风力机环加筋柱极端水击损伤及残余强度数值分析

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-28 DOI: 10.1016/j.marstruc.2025.103900

Stina Bjørgo Fimreite , Zhaolong Yu , Jørgen Amdahl , Marilena Greco

{"title":"Numerical analysis of extreme water slamming damage and residual strength of ring-stiffened columns of a semi-submersible floating offshore wind turbine","authors":"Stina Bjørgo Fimreite , Zhaolong Yu , Jørgen Amdahl , Marilena Greco","doi":"10.1016/j.marstruc.2025.103900","DOIUrl":"10.1016/j.marstruc.2025.103900","url":null,"abstract":"<div><div>Foundation platforms of floating offshore wind turbines (FOWTs) must withstand harsh weather conditions, during which wave slamming is an important loading condition. Slamming is a complex dynamic problem involving fluid–structure interactions (FSI) but is often simplified as simple pressure loads neglecting the coupling effects during design. This paper examines the local structural response of a column of a FOWT floater during slamming, offering deeper understanding of impact dynamics and a measure of accuracy for design methods.</div><div>An initial benchmark study on numerical techniques of modeling FSI during water impact of a thin plate was conducted adopting three approaches, i.e. arbitrary Lagrangian–Eulerian (ALE), smoothed particle hydrodynamics (SPH) and incompressible computational fluid dynamics (ICFD). Subsequently, water impact on a ring stiffened cylindrical column of a FOWT floater was investigated using ALE simulations in a range of idealized impact conditions. The structural responses and impact pressures were analyzed, focusing on structural damage evolution. Simplified design methods for predictions of slamming damage were compared with the coupled FSI simulations, using four methods for generating design pressures. Finally, the residual bending strength of the damaged column was determined as an assessment of the consequences of slamming regarding structural integrity.</div><div>This paper provides insights into accuracy levels of different numerical techniques for FSI modeling and contributes to efficient design of offshore structures subjected to severe wave slamming.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"105 ","pages":"Article 103900"},"PeriodicalIF":4.0,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713366","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

Torsional and tension–bending analysis of a three-core submarine power cable 三芯海底电力电缆的扭转和拉伸弯曲分析

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-26 DOI: 10.1016/j.marstruc.2025.103896

Pan Fang , Xiao Li , Xiaoli Jiang , Hans Hopman , Yong Bai

引用次数: 0

Second order buckling load of underwater composite cylinder 水下复合材料圆柱体的二阶屈曲载荷

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-25 DOI: 10.1016/j.marstruc.2025.103904

Yao Zhu

{"title":"Second order buckling load of underwater composite cylinder","authors":"Yao Zhu","doi":"10.1016/j.marstruc.2025.103904","DOIUrl":"10.1016/j.marstruc.2025.103904","url":null,"abstract":"<div><div>In this paper, a novel nonlinear second-order buckling load computational method is proposed for underwater composite submersibles using variational principle while solving the effects of nonorthogonal anisotropic constitutive relationship and all linear and nonlinear terms in the discrete Lagrangian strain. For 20 medium-length experimental specimens in the range of 14.11∼68.70 radius-to-thickness ratios, the maximum prediction error of this method is -15.235 %, the minimum prediction error is 0.90 %, and the average prediction error is 6.17 %; the absolute prediction errors are within 10 % for 16 specimens, and within 15 % for 19 specimens. For the 22 experimental specimens in the range of 8.33 ∼ 68.70 radius-to-thickness ratios with length-to-radius ratio increasing up to 24, the maximum prediction error of the method is -18.85 %, the minimum prediction error is 0.90 %, and the average prediction error is 6.98 %; the absolute prediction error is within 10 % for 16 of the specimens, and within 15 % for 20 of the specimens. In addition, this method has good convergence, stability, and angle order immunity. The method improves the prediction accuracy and reduces the prediction error fluctuation range compared with analytical methods and commercial FEM software. The method solves the difficulty that commercial FEM software is unable to predict the buckling loads under classical simply supported boundary condition. Among the total 22 specimens, the prediction results about 19 of them shows conservative results, with the maximum degree of conservatism of -18.85 %, which is within the engineering acceptance range. This is conducive to providing a more adequate safety margin of buckling load for the design of underwater composite submersibles in offshore engineering.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"105 ","pages":"Article 103904"},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702601","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

Analytical formulation for natural frequency of monopile-supported offshore wind turbine: Calibration and application 单桩支撑海上风力机固有频率解析公式：校准与应用

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-23 DOI: 10.1016/j.marstruc.2025.103901

Fangyu Wu , Zhongxuan Yang , Subhamoy Bhattacharya , Rongqiao Xu , Sai Fu

{"title":"Analytical formulation for natural frequency of monopile-supported offshore wind turbine: Calibration and application","authors":"Fangyu Wu , Zhongxuan Yang , Subhamoy Bhattacharya , Rongqiao Xu , Sai Fu","doi":"10.1016/j.marstruc.2025.103901","DOIUrl":"10.1016/j.marstruc.2025.103901","url":null,"abstract":"<div><div>The dynamic response of monopile supported offshore wind turbines (OWT) plays a critical role in their structural design optimization. During the design optimization process, various methods, including numerical simulations and closed-form solutions, are used to analyze the free vibration behavior of monopile-supported OWTs. This study introduces an analytical model based on the Rayleigh-Ritz method to derive a fast yet accurate estimation formula for natural frequencies.</div><div>Given the increasing deployment of OWTs in deeper waters with complex seabed conditions prone to scouring, as well as the trend toward larger turbine sizes, the calibrated model and Rayleigh-Ritz formula are applied to assess the effects of scouring on natural frequencies across different turbine scales. The study also examines the relationship between the natural frequencies computed using a fixed-base assumption and the effect of foundation flexibility, accounting for variations in ground conditions. Furthermore, the work explores frequency trends across multiple turbines scales and identifies feasible turbine sizes for deployment in four specific seas of China.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103901"},"PeriodicalIF":4.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686357","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

Analysis on the mechanical properties of TPJ foundation during scour development under different wave and current parameters 不同波流参数下TPJ地基冲刷发展过程力学特性分析

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-23 DOI: 10.1016/j.marstruc.2025.103899

Ning Wang , Ruihu Zhu , Qiming Wang , Siyuan He , Ling Qiu

{"title":"Analysis on the mechanical properties of TPJ foundation during scour development under different wave and current parameters","authors":"Ning Wang , Ruihu Zhu , Qiming Wang , Siyuan He , Ling Qiu","doi":"10.1016/j.marstruc.2025.103899","DOIUrl":"10.1016/j.marstruc.2025.103899","url":null,"abstract":"<div><div>In order to analyse the changes in the mechanical properties of the tetrapod piled jacket (TPJ) foundation under wave-current during scour development, a scour test is conducted in a wave current flume. This test allows for the simultaneous detection of several key parameters, including the scour depth around the pile, the bending moment of the pile, the displacement of the tower top, and the secant stiffness of foundation. The results demonstrate that the scour depth of the upstream piles is greater than that of the downstream piles due to the shading effect of the upstream pile, which results in a 24.7 % greater bending moment in the upstream pile compared to the downstream pile. The correlation coefficient between the accumulated displacement of the tower top and the scour depth is greater than 0.9, indicating a strong correlation between the two variables. An increase in the strength of the current will lead to a significant increase in the accumulated displacement. The secant stiffness of foundation is mainly affected by the wave-induced pore pressure, scour, and cyclic loading.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103899"},"PeriodicalIF":4.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686330","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

Collapse performance enhancement in the sizing process of ERW pipes produced using edge, double radii, and reverse bending methods 边弯法、双半径弯法和反向弯法生产的ERW管材尺寸加工过程中抗塌性能的提高

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-22 DOI: 10.1016/j.marstruc.2025.103905

Phi-Long Tran , Soo-Chang Kang , Jin-Kook Kim

{"title":"Collapse performance enhancement in the sizing process of ERW pipes produced using edge, double radii, and reverse bending methods","authors":"Phi-Long Tran , Soo-Chang Kang , Jin-Kook Kim","doi":"10.1016/j.marstruc.2025.103905","DOIUrl":"10.1016/j.marstruc.2025.103905","url":null,"abstract":"<div><div>The rising demand for offshore transportation of oil, gas, and derivatives necessitates high-performing pipeline infrastructure. Electric resistance welded pipes, manufactured through cold-forming processes, have become a cornerstone for offshore pipeline systems. This study employs sequential numerical simulations in ABAQUS to model the pipe-forming process and predict collapse pressures—a pivotal design parameter for offshore pipelines. Three forming methods were modeled: reverse bending forming, double radii forming, and edge forming, with roller geometries tailored to each technique. The constitutive model integrated cyclic tension-compression loading, incorporating the Bauschinger effect and strain hardening for precise material representation. The impact of the sizing stage in the pipe manufacturing was analyzed through different sizing ratios and the thickness-to-diameter ratio. Results demonstrated that higher sizing ratios uniformly enhance collapse pressure regardless of the forming method, particularly in pipes with larger <em>t/D</em> values. Among the forming methods, reverse bending forming consistently produced pipes with superior collapse performance. Parametric studies further explored the influence of ovality and stress history on collapse pressure enhancement across sizing ratios.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103905"},"PeriodicalIF":4.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679599","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 validated fluid–structure interaction simulation model for vortex-induced vibration of a flexible pipe in steady flow 稳定流动中挠性管道涡激振动的流固耦合仿真模型

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-15 DOI: 10.1016/j.marstruc.2025.103895

Xuepeng Fu, Shixiao Fu, Zhibo Niu, Bing Zhao, Jiawei Shen, Pengqian Deng

{"title":"A validated fluid–structure interaction simulation model for vortex-induced vibration of a flexible pipe in steady flow","authors":"Xuepeng Fu, Shixiao Fu, Zhibo Niu, Bing Zhao, Jiawei Shen, Pengqian Deng","doi":"10.1016/j.marstruc.2025.103895","DOIUrl":"10.1016/j.marstruc.2025.103895","url":null,"abstract":"<div><div>We propose a validated fluid–structure interaction simulation framework based on the strip method for the vortex-induced vibration of a flexible pipe. The numerical results are compared with the experimental data from three steady flow conditions: uniform, linearly sheared, and bidirectionally sheared flow. The Reynolds number ranges from <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>4</mn></mrow></msup></mrow></math></span> to <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>5</mn></mrow></msup></mrow></math></span>. The flow field is simulated based on open-source software OpenFOAM. The solid field is modeled based on the finite element method of the Euler–Bernoulli beam, and fluid–structure coupling is implemented via a weak coupling algorithm developed in MATLAB. The vortex-induced vibration response is assessed in terms of amplitude and frequency, along with the differences in strain. Additionally, wavelet analysis and traveling wave phenomena are investigated. This study presents the first numerical simulation of flexible pipe VIV under bidirectionally sheared flow, validated against experimental data. Compared to uniform and linearly sheared flow, the bidirectionally sheared flow condition leads to more pronounced traveling wave behavior and stronger multi-frequency responses, especially in the in-line direction. The simulation results are directly compared with measured strain data, showing agreement across different flow conditions. The numerical simulation codes and experimental data in this manuscript are openly available, providing a foundation for more complex vortex-induced vibration simulations in the future.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103895"},"PeriodicalIF":4.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632226","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