Journal of Ocean Engineering and Science最新文献_第6页

Experimental hydrodynamic assessment of a cylindrical-type floating solar system exposed to waves 波浪作用下圆柱形漂浮太阳系的实验流体动力学评估

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.08.004

Dallán Friel , Madjid Karimirad , Trevor Whittaker , John Doran

{"title":"Experimental hydrodynamic assessment of a cylindrical-type floating solar system exposed to waves","authors":"Dallán Friel , Madjid Karimirad , Trevor Whittaker , John Doran","doi":"10.1016/j.joes.2023.08.004","DOIUrl":"https://doi.org/10.1016/j.joes.2023.08.004","url":null,"abstract":"<div><p>In this paper, an experimental investigation on the wave loads and structural motions of two semi-fixed semi-immersed horizontal cylinders type rafts in the free surface zone is conducted. The physical models are tested at the 1:4.5 scale and exposed to a range of regular and irregular waves in a wave flume at Queen's University Belfast. The physical models and experimental setup are discussed alongside an investigation of the hydrodynamic phenomena, surge forces, and dynamic responses that each structure exhibits in the coastal wave climates. Furthermore, an investigation into the wave attenuation by both models is carried out. The results show that the surge forces have a positive correlation with wave steepness for both models. Hydrodynamic phenomena such as wave runup and overtopping, radiative damping and reflected waves, constructive interference, diffraction and flow separation were identified during the experiments. A negative mean heave displacement is observed during the monochromatic sea states which could result in impact loading and submergence of the superstructure components and photovoltaic panels at full-scale. The results presented in this paper may be used to calibrate and verify numerical models that calculate the global responses and hydrodynamic forces. It may also benefit the design processes of geometrically similar floating solar technologies by providing data on surge loads, motion responses and hydrodynamic observations.</p></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50176849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 machine learning model for fast approximation of free-surface Green's function and its application 自由曲面格林函数快速逼近的机器学习模型及其应用

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.08.002

Ke Zhan, R. Zhu, Dekang Xu

引用次数: 0

Numerical simulation of violent interactions between dam break flow and a floating box using a modified MPS method 用改进的MPS方法数值模拟溃坝流与浮箱的剧烈相互作用

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.08.003

Date Li, Huaixin Zhang, Guangfei Qin

引用次数: 0

Hydroelasticity analysis of a vessel-shaped fish cage under incident, diffraction and radiation wave fields 船形网箱在入射、衍射和辐射波场作用下的水弹性分析

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.05.001

Yihou Wang , Shixiao Fu , Torgeir Moan , Yuwang Xu , Tianhu Cheng

{"title":"Hydroelasticity analysis of a vessel-shaped fish cage under incident, diffraction and radiation wave fields","authors":"Yihou Wang , Shixiao Fu , Torgeir Moan , Yuwang Xu , Tianhu Cheng","doi":"10.1016/j.joes.2023.05.001","DOIUrl":"10.1016/j.joes.2023.05.001","url":null,"abstract":"<div><p>Vessel-shaped fish cages are promising large aquaculture structures developed in recent years, with an overall length of nearly 400 m. In this paper, a coupled hydroelasticity model of a vessel-shaped fish cage is used to calculate the motion and structural response in the time domain. First, the floating body of the cage is discretized into a multimodule system to calculate the frequency-domain hydrodynamic loads. Then, the multimodule system is connected by equivalent elastic beams to consider the hydroelastic behavior in the time domain. The hydrodynamic loads of the multimodule system are transformed from the frequency-domain loads. Moreover, based on the velocity field transfer functions and the motion of the multimodule system, coupling wave fields considering incident, diffraction and radiation waves are built and used to calculate the loads on the net and steel frame. By iterating the motion response of the multimodule system and the hydrodynamic loads on the net and steel frame in the time domain, the balanced hydroelasticity response of the whole cage is finally obtained. The results show that the hydroelasticity effects have a significant influence on the vertical displacement and cross-sectional load effects of the vessel-shaped fish cage.</p></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44341939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 2

Cross-sectional mechanical characteristics and sensitivity analysis of unbonded flexible risers under axial loads 轴向载荷作用下无粘结柔性立管的截面力学特性及灵敏度分析

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.08.005

Xiansheng Zhang, Weiping Huang, Weilin Ma, Su Lei, Tian Haoyu, Yongchun Yang

引用次数: 0

Large eddy simulation of plunging solitary wave: understanding the breaking and turbulent mechanisms along shoaling region 骤降孤立波的大涡模拟：对浅水区破碎和湍流机制的理解

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.07.008

Abbas Rahmani, A. Keramat, Jinghua Wang, H. Duan

引用次数: 0

Time-domain floater stress analysis for a floating wind turbine 浮式风力发电机浮子应力时域分析

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-08-01 DOI: 10.1016/j.joes.2023.08.001

Zhen Gao , Daniel Merino , Kai-Jia Han , Haoran Li , Stian Fiskvik

{"title":"Time-domain floater stress analysis for a floating wind turbine","authors":"Zhen Gao , Daniel Merino , Kai-Jia Han , Haoran Li , Stian Fiskvik","doi":"10.1016/j.joes.2023.08.001","DOIUrl":"10.1016/j.joes.2023.08.001","url":null,"abstract":"<div><p>There are increasing focuses on developing cost-effective floating wind turbines, for which efficient stress analysis methods are needed for floater structural design. Most of the today's studies focus on global analysis methods in which the floater is assumed as a rigid body or multiple rigid bodies and the stress distributions in the floater cannot be directly obtained. As part of the COWI Fonden funded EMULF project, a summary about the methodology, the numerical modeling procedure and the verification for stress response analysis of a semi-submersible floater for a 15MW wind turbine is presented. This analysis procedure includes the regeneration of the hydrodynamic pressure loads on the external wet surface of the floater due to wave diffraction, radiation and hydrostatic pressure change, and the application of these pressure loads, together with the time-varying gravity due motions, the inertial loads and the forces/moments at the boundaries (i.e. tower bottom and mooring line fairleads) of the floater to obtain the deformation and the stresses of the floater in the time domain. The analysis procedure is implemented in a developed MATLAB code and the DNV software package. The importance of the different hydrodynamic pressure components was discussed considering representative sea states. A verification of the obtained stress time series and statistics using this method against the regeneration from a linear frequency-domain approach was made considering irregular wave actions only, and a very good agreement was obtained. The developed methodology can provide an efficient solution for structural design analysis of floating wind turbines.</p></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41437049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 3

A spectral coupled boundary element method for the simulation of nonlinear surface gravity waves 模拟非线性表面重力波的谱耦合边界元方法

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-07-01 DOI: 10.1016/j.joes.2023.07.003

Kaiyuan Shi, R. Zhu, Dekang Xu

引用次数: 1

Mechanism analysis and prediction of longitudinal cut wave pattern resistance based on CFD simulation 基于CFD模拟的纵切波纹阻力机理分析与预测

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-07-01 DOI: 10.1016/j.joes.2023.07.001

Xiaocong Wang, R. Zhu, Dekang Xu, Hui Wang, Yuehan Gu

引用次数: 0

A systematic review of state-of-the-art technologies for monitoring plastic seafloor litter 对监测海底塑料垃圾的最新技术进行系统回顾

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-07-01 DOI: 10.1016/j.joes.2023.07.004

M. Sandra, L. Devriese, A. Booth, B. De Witte, G. Everaert, J. Gago, F. Galgani, Kobus Langedock, A. Lusher, T. Maes, H. Pirlet, J. Russell, C. Pham

引用次数: 0