Marine Structures最新文献_第2页

Simulated ice loads on a ship propeller and comparison with full-scale measurements 模拟船舶螺旋桨上的冰载荷及其与实际测量值的比较

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-03 DOI: 10.1016/j.marstruc.2025.103879

Jorrid Lund, Lina Sapp, Jan Manuel Kubiczek, Angelo Mario Böhm, Franz von Bock und Polach

{"title":"Simulated ice loads on a ship propeller and comparison with full-scale measurements","authors":"Jorrid Lund, Lina Sapp, Jan Manuel Kubiczek, Angelo Mario Böhm, Franz von Bock und Polach","doi":"10.1016/j.marstruc.2025.103879","DOIUrl":"10.1016/j.marstruc.2025.103879","url":null,"abstract":"<div><div>A methodology to better estimate the loads of ice acting on the propeller of a ship is developed. Based on measurements conducted in the North Pole region, an existing failure model for ice based on the Mohr–Coulomb nodal split approach is modified to better represent the lower strength of polar ice compared to laboratory ice. The modified material model for the sea ice is used to compute the propeller torque and a load spectrum for the propeller-ice interaction of the research ship <em>S.A. Agulhas II</em>. To this end, a floe-ice breaking simulation is used to estimate the size and shape of the ice cusps hitting the propeller of this ship. In the next step, a set of finite element simulations of the propeller-ice interaction utilizing the modified Mohr–Coulomb nodal split model is conducted. Based on this, the load spectrum is computed and compared with the measured torque on the propeller shaft of the <em>S.A. Agulhas II</em>. The successful reproduction shows the applicability of the approach to better estimate the loads exerted by the ice on the propeller.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103879"},"PeriodicalIF":4.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549587","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

On the use of an advanced Kirchhoff rod model to study mooring lines 利用先进的基尔霍夫杆模型研究系泊线

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-01 DOI: 10.1016/j.marstruc.2025.103883

Bruno A. Roccia , Thi-Hoa Nguyen , Petter Veseth , Finn Gunnar Nielsen , Cristian G. Gebhardt

{"title":"On the use of an advanced Kirchhoff rod model to study mooring lines","authors":"Bruno A. Roccia , Thi-Hoa Nguyen , Petter Veseth , Finn Gunnar Nielsen , Cristian G. Gebhardt","doi":"10.1016/j.marstruc.2025.103883","DOIUrl":"10.1016/j.marstruc.2025.103883","url":null,"abstract":"<div><div>In this work, we investigate the application of an advanced nonlinear torsion- and shear-free Kirchhoff rod model, enhanced with a penalty-based barrier function (to simulate the seabed contact), intended for studying the static and dynamic behavior of mooring lines. The formulation incorporates conservative and non-conservative external loads, including those coming from the surrounding flow (added mass, tangential drag, and normal drag). To illustrate the favorable features of this model, we consider some key scenarios such as static configurations, pulsating force applications at the fairlead, and fluid–structure interaction between mooring lines and the surrounding flow. Verification against well-established solutions, including catenary configurations and OpenFAST simulations, shows excellent accuracy in predicting mooring line responses for a floating offshore wind turbine. Among the most important results, we can mention that under normal pulsating loads at the fairlead, the mooring line exhibits a transition from a drag-dominated regime at low frequencies to an added-mass-dominated regime at higher frequencies. Furthermore, tangential forcing at the fairlead reveals a strong coupling between axial and bending dynamics, contrasting with normal forcing scenarios where axial dynamics remain largely unaffected. These findings underscore the potential of the proposed approach for advanced mooring line simulations.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103883"},"PeriodicalIF":4.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523787","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

Penetration installation of the13-compartment mono-column composite bucket foundation for offshore wind turbines 海上风力发电机组13室单柱复合桶形基础侵彻安装

IF 4 2区工程技术

Marine Structures Pub Date : 2025-07-01 DOI: 10.1016/j.marstruc.2025.103891

Puyang Zhang, Yabo Pang, Xin Qi, Conghuan Le, Hongyan Ding

{"title":"Penetration installation of the13-compartment mono-column composite bucket foundation for offshore wind turbines","authors":"Puyang Zhang, Yabo Pang, Xin Qi, Conghuan Le, Hongyan Ding","doi":"10.1016/j.marstruc.2025.103891","DOIUrl":"10.1016/j.marstruc.2025.103891","url":null,"abstract":"<div><div>The 13-compartment mono-column composite bucket foundation, which will be abbreviated as \"The 13-compartment MCCBF\" in the following text, has stronger applicability to the shallow bedrocks and plays an important role in the development of wind farms in the South China Sea with more shallow bedrocks. This paper studies the penetration installation characteristics of 13-compartment MCCBF under four geological conditions: pure sand, clay over sand, sand over shallow bedrock, and clay over shallow bedrock. Through a 1:60 scale model test, the variation law of the pore water pressure around the foundation during its penetration installation was analyzed, the morphological changes of the surrounding soil and the development law of soil plug after the foundation installation were explained, and the required penetration suction of the foundation under different geological conditions was explored. The research results show that during the penetration installation of the foundation, the required pressure difference increases with the increase of the penetration depth, the pressure of the compartment in the overlying clay geology is higher than that in the overlying sand geology, with a difference of about 3–5.5 times. The penetration installation speed of the foundation in the shallow bedrock geology is faster, about 1.6–5 times that of the geology without shallow bedrocks. The volume of seepage water in the sand over shallow bedrock geology is about 50 % of that in the pure sand geology. Soil plug will be formed in the process of foundation penetration, among which the soil plug is the highest in the sand over shallow bedrock geology.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103891"},"PeriodicalIF":4.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523788","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 investigation on hydro-elastoplastic responses of floating laminated structures under wave action 波浪作用下浮动层合结构水弹塑性响应的数值研究

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-30 DOI: 10.1016/j.marstruc.2025.103884

Zijian Jin, Hui Fang, Yong Liu

{"title":"Numerical investigation on hydro-elastoplastic responses of floating laminated structures under wave action","authors":"Zijian Jin, Hui Fang, Yong Liu","doi":"10.1016/j.marstruc.2025.103884","DOIUrl":"10.1016/j.marstruc.2025.103884","url":null,"abstract":"<div><div>Based on the Coupled Eulerian-Lagrangian (CEL) numerical method in Finite Element Modelling (FEM) software ABAQUS, a numerical wave flume model was established to solve the wave-structural elastoplastic coupling problem of floating laminated structures. The physical wave-generating mode was adopted to form waves by controlling the motion of a rigid plate, and the water wave dissipation was realized by establishing a damping zone with high dynamic viscosity coefficients. A two-way fluid-structure coupling numerical approach was further proposed and verified for the hydro-elastoplastic problem of floating structures. The present two-way interaction approach was validated based on the previous physical test for the floating homogenous structures and the theoretical model for the floating laminated structures. Finally, combining the composite material configuration, reinforced member characteristic, structural laminated feature, and hydrodynamic loads, a multiscale numerical framework with the CEL-FEM approach was presented to intuitively simulate the hydro-elastoplastic responses of the floating laminated structures under wave action. As an illustration, a floating laminated structure (FLS) was initially designed to consist of the lower deformable layer and the upper high-stiffness reinforced layer. Based on the multiscale numerical framework, the initial design of FLS was optimized by ameliorating the material meso-composition and reinforced member macro-parameter to realize the structural performance enhancement. Fully simulating the interactive processes between water waves and structural elastoplasticity of the FLSs under different wave conditions, the mechanism and understanding of the hydro-elastoplastic problem was elucidated by analyzing the evolutions of the hydrodynamic characteristics, plastic dissipation energy, fluid domain stress distribution, and structural responses.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103884"},"PeriodicalIF":4.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517356","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

Predicting failure envelopes of skirted spudcan footings under combined loads using ACOoptimized extremely randomized trees 应用aco优化的极端随机树预测组合荷载作用下裙边柱脚的破坏包络

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-30 DOI: 10.1016/j.marstruc.2025.103890

Katavut Vichai , Duy Tan Tran , Jim Shiau , Suraparb Keawsawasvong , Pitthaya Jamsawang

{"title":"Predicting failure envelopes of skirted spudcan footings under combined loads using ACOoptimized extremely randomized trees","authors":"Katavut Vichai , Duy Tan Tran , Jim Shiau , Suraparb Keawsawasvong , Pitthaya Jamsawang","doi":"10.1016/j.marstruc.2025.103890","DOIUrl":"10.1016/j.marstruc.2025.103890","url":null,"abstract":"<div><div>Skirted spudcan foundations are widely employed in offshore geotechnical engineering due to their enhanced penetration capability and superior load resistance in soft clay soils. In this study, the undrained failure envelope of skirted spudcan subjected to combined vertical, horizontal, and moment (VHM) loading is investigated using Finite Element Limit Analysis (FELA). A total of 624 simulations are performed in OptumG3, systematically varying the embedment ratio (<em>L/D</em>), soil strength heterogeneity (<em>κ</em>), vertical load mobilization (<em>V/V<sub>0</sub></em>), and loading limit for the FELA (<em>β</em>) to construct the VHM failure envelope in non-homogeneous clay. To complement the numerical approach and mitigate computational intensity, a machine learning model is developed using Extremely Randomized Trees (ET) optimized via Ant Colony Optimization (ACO). The resulting ET-ACO model demonstrates excellent agreement with the FELA outcomes, achieving R² values exceeding 0.998. Feature importance analysis highlights the FELA loading limit (<em>β</em>) and embedment ratio (<em>L/D</em>) as the most influential parameters governing failure capacity. This data-driven methodology provides a reliable and effective alternative for evaluating offshore foundation performance, as it not only accelerates the prediction of failure envelopes but also significantly reduces computational costs.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103890"},"PeriodicalIF":4.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518687","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

Multi-rotor-based real-time hybrid model tank testing of a 10-MW semi-submersible offshore floating wind turbine 10mw海上浮式半潜式风力机多转子实时混合模型箱试验

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-27 DOI: 10.1016/j.marstruc.2025.103888

Wei Shi , Jie Fu , Lingyang Cao , Xu Han , Ling Wan , Madjid Karimirad , Wenhua Wang

{"title":"Multi-rotor-based real-time hybrid model tank testing of a 10-MW semi-submersible offshore floating wind turbine","authors":"Wei Shi , Jie Fu , Lingyang Cao , Xu Han , Ling Wan , Madjid Karimirad , Wenhua Wang","doi":"10.1016/j.marstruc.2025.103888","DOIUrl":"10.1016/j.marstruc.2025.103888","url":null,"abstract":"<div><div>Traditional model test faces challenges such as scale effects, difficulties in reproducing turbulent wind, and the inability to simulate shutdown conditions. To address these issues, a 10 MW semi-submersible offshore floating wind turbine was selected as the research subject. An innovative real-time hybrid model test based on a multi-rotor loading device is proposed. The development process of the numerical substructure, the design and control of the loading device has been made public. The physical substructure was designed at a 1:75 scale and installed in a wave tank, where free decay, regular wave, only wind, combined wind and irregular wave, and shutdown tests were conducted. Experimental data were compared and analyzed against simulation results. In the wind test results, the maximum deviation in the mean aerodynamic load across different directions was only 2.59%, indicating that the developed multi-degree-of-freedom loading device effectively reproduces turbulent wind loads. In the two repeated combined wind-wave tests, the average errors for platform surge, pitch, heave motions, and mooring tension were found to be within 2.12%, indicating that repeatability is exhibited by the developed hybrid model test technology. The hybrid experimental method developed in this study simulates the shutdown operating conditions of offshore wind turbines, the study reveals that under parked conditions, the proportion of wave frequency in the platform motion response power spectrum increases significantly. The motion response of offshore wind turbines, induced by impact loads during shutdown, provides valuable insights for the design of offshore wind turbines.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103888"},"PeriodicalIF":4.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491622","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

Optimization design of helical carcass supported flexible cryogenic pipe based on BP-MOWOA 基于BP-MOWOA的螺旋骨架支撑低温柔性管道优化设计

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-27 DOI: 10.1016/j.marstruc.2025.103886

Jun Yan , Yufeng Bu , Ruonan Zhou , Lizhe Jiang , Chunyu Zhao , Yuanchao Yin

{"title":"Optimization design of helical carcass supported flexible cryogenic pipe based on BP-MOWOA","authors":"Jun Yan , Yufeng Bu , Ruonan Zhou , Lizhe Jiang , Chunyu Zhao , Yuanchao Yin","doi":"10.1016/j.marstruc.2025.103886","DOIUrl":"10.1016/j.marstruc.2025.103886","url":null,"abstract":"<div><div>In recent years, the demand for offshore liquefied natural gas (LNG) exploration and transportation has set higher performance standards for cryogenic pipes, particularly the helical carcass supported flexible cryogenic pipe (hc-FCP). Due to its multi-layered, spiral-wound, and non-bonded structure, optimizing the design of hc-FCP presents significant challenges. This paper proposes an optimization approach combining the backpropagation neural network and the multi-objective whale optimization algorithm (BP-MOWOA) to address the multi-objective optimization of hc-FCP structures. First, a high-precision finite element model of the hc-FCP was established and validated through experimental data. The model was used to generate a large dataset that captured the mechanical performance of hc-FCP under various operating conditions. Second, a backpropagation (BP) neural network was trained to predict the axial tensile and bending stiffness of the hc-FCP, forming the basis for the optimization process. Lastly, the BP-MOWOA was employed to optimize critical design parameters, such as the winding angles of the reinforcement layers, to achieve maximum axial tensile stiffness and reduced bending stiffness with minimal material consumption. The optimized design improved axial tensile stiffness by 24.35 %, reduced bending stiffness by 2.99 %, and lowered material consumption by 1.84 %. These results demonstrate the effectiveness of the BP-MOWOA in optimizing hc-FCP structures for enhanced performance and cost-efficiency, providing a flexible solution for engineering applications in varying operational conditions.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103886"},"PeriodicalIF":4.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492065","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 of fluid-structure interaction vibration and fatigue life of fluid-filled pipelines in underwater vehicles 水下航行器充液管道流固耦合、振动及疲劳寿命分析

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-24 DOI: 10.1016/j.marstruc.2025.103885

Xinyue Du , Dongyang Chen , Qiaogao Huang , Yaochen Lin , Jing Liu , Guang Pan

{"title":"Analysis of fluid-structure interaction vibration and fatigue life of fluid-filled pipelines in underwater vehicles","authors":"Xinyue Du , Dongyang Chen , Qiaogao Huang , Yaochen Lin , Jing Liu , Guang Pan","doi":"10.1016/j.marstruc.2025.103885","DOIUrl":"10.1016/j.marstruc.2025.103885","url":null,"abstract":"<div><div>This study investigates vibration characteristics and fatigue damage mechanisms in underwater vehicles subjected to complex coupled loading (external random excitation and internal fluid pulsation). Focusing on fluid-filled straight and bent pipes, this research complements existing analyses of multi-type pipelines and coupled vibration fatigue. A bidirectional fluid-structure interaction time-domain analysis framework is established based on a three-dimensional finite element model to quantify dynamic responses and predict fatigue life. Key findings demonstrate that: (1) Fluid pulsation dominates stress distribution, with fluid-filled pipes exhibiting 40 % lower modal frequencies than empty pipes, indicating that the incompressibility of the fluid suppresses pipe deformation; (2) Straight pipe configurations show a 42 % reduced equivalent stress compared to bent counterparts, which highlights bend-induced vibration amplification; (3) Vortex-induced pressure fluctuations at pipe bends accelerate fatigue damage progression. These findings provide practical significance for analyzing the dynamic behavior and damage resistance of piping systems, as well as enhancing the safety and reliability of engineered pipelines.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103885"},"PeriodicalIF":4.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470469","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

Theoretical analysis of elastic collapse in metallurgical clad pipes under external pressure 外压作用下冶金包层管道弹性坍塌的理论分析

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-20 DOI: 10.1016/j.marstruc.2025.103861

Mingjie Hu , Haohong Jian , Menglan Duan , Qiwei Wu , Weifeng Zheng

{"title":"Theoretical analysis of elastic collapse in metallurgical clad pipes under external pressure","authors":"Mingjie Hu , Haohong Jian , Menglan Duan , Qiwei Wu , Weifeng Zheng","doi":"10.1016/j.marstruc.2025.103861","DOIUrl":"10.1016/j.marstruc.2025.103861","url":null,"abstract":"<div><div>Metallurgical Clad Pipes (MCPs), due to their unique manufacturing process and excellent corrosion resistance, are key equipment for transporting highly corrosive oil and gas in offshore systems. However, the high external hydrostatic pressure in deep-sea environments poses significant risks of collapse, threatening the structural safety of MCPs. In this research, the elastic collapse performance of MCPs under external pressure is investigated by deriving a novel analytical formula based on Donnell shell theory and the Ritz method. The proposed formula considers the perpendicularity of pressure during deformation and is validated through comparisons with the DNV-ST-F101 formula and FEM simulations. The findings demonstrate that the elastic post buckling equilibrium path of MCPs follows the same pattern as that of conventional single-metal pipelines. Moreover, the proposed formula shows improved accuracy and greater applicability to various geometric properties and materials. Research works may provide a theoretical basis to improve the design and safety of MCPs and contribute to the ongoing development of offshore pipeline engineering.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103861"},"PeriodicalIF":4.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322649","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

Nonlinear dynamic responses of a novel floating semi-submersible wind-solar-aquaculture hybrid system: An experimental study 新型浮式半潜式风-太阳能-水产混合系统的非线性动力响应实验研究

IF 4 2区工程技术

Marine Structures Pub Date : 2025-06-20 DOI: 10.1016/j.marstruc.2025.103881

Sheng Zhang , Xiang Yuan Zheng , Yue Liu , Yucong Jiang , Yu Lei , Xiangyu Zhang , Kehao Qian , Xin Li , Wei Shi

{"title":"Nonlinear dynamic responses of a novel floating semi-submersible wind-solar-aquaculture hybrid system: An experimental study","authors":"Sheng Zhang , Xiang Yuan Zheng , Yue Liu , Yucong Jiang , Yu Lei , Xiangyu Zhang , Kehao Qian , Xin Li , Wei Shi","doi":"10.1016/j.marstruc.2025.103881","DOIUrl":"10.1016/j.marstruc.2025.103881","url":null,"abstract":"<div><div>This paper presents a novel, maintenance-friendly, multifunctional floater that combines a 10 MW floating offshore wind turbine, a fish cage and photovoltaics (FOWT-FCP). To study its multi-body coupling dynamic characteristics under wind and waves, physical model tests of scale 1:30 are carried out in the ocean basin, providing a benchmark for establishing numerical simulations. As the coupling is associated with the nonlinear effect of fish nets, the tests are conducted in two comparative configurations, with and without nets. The dynamic responses of 6 degrees of freedom (DOFs) cage motions, the accelerations at tower top and bottom and cable tensions are collected in regular waves, white noise waves and critical wind-wave load cases. They are comprehensively analyzed in the time and frequency domains. The experimental results show that FOWT-FCP has an excellent seakeeping performance. The dynamic responses in both operational and extreme sea states are well below the code limits. The existence of nets increases not only the 6-DOF motion damping but also the fluid loads, yet from the experimental results, both increases are small. Moreover, the nets reduce the standard deviations and extreme values of responses under rated condition, while enhancing them under survival condition. Therefore, the influence of nets on dynamic responses depends on load conditions. Besides, the responses follow a heavy-tailed non-Gaussian distribution with greater extreme values, and the presence of nets increases the level of non-Gaussianity of responses under survival condition. For almost all measured dynamic responses, their low- and high-frequency components are increased by the wind loads.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"104 ","pages":"Article 103881"},"PeriodicalIF":4.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322650","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