Journal of Ocean Engineering and Science最新文献_第8页

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

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":"8 4","pages":"Pages 418-434"},"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

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

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":"8 4","pages":"Pages 435-445"},"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 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

Theory and practice of hull dynamic deformation law and heading angle transfer error correction 船体动变形规律及航向角传递误差修正的理论与实践

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-06-03 DOI: 10.1016/j.joes.2023.05.005

Yepin Qu, Jianqiang Liu, Yuhai Lyu, Chaoran Zhang, Tao Li

{"title":"Theory and practice of hull dynamic deformation law and heading angle transfer error correction","authors":"Yepin Qu, Jianqiang Liu, Yuhai Lyu, Chaoran Zhang, Tao Li","doi":"10.1016/j.joes.2023.05.005","DOIUrl":"10.1016/j.joes.2023.05.005","url":null,"abstract":"<div><p>In order to meet the demand of high-precision heading angle transmission in the transfer alignment of inertial navigation system on moving base, the analytical function relationship between the hull deformation and the turning angular velocity and angular acceleration was derived by using the classical beam theory based on the analysis of the equivalent load exerted by the hydrodynamic force and inertia force on the hull structure during the turning process under the combined action of the steering rudder moment and wave force. The objective law between the angular motion and the azimuth deformation angle of the hull under the combined action of maneuvering and sea waves was revealed. Finally, the correction coefficients were determined according to the left turn and right turn motions of the hull by using the measured data of the ship in the sea trial during the S-shape maneuvering navigation, and the azimuth deformation angle correction was completed. The results indicated that the application of the Qu's bending deformation correction formula could greatly reduce the influence of the hull flexural deformation on the heading angle accuracy, meet the needs of high-precision heading angle transmission, and fully verify the correctness of the hull azimuth deformation law and the heading angle transmission error correction theory. This theory and method provided technical support for establishing high-precision distributed digital reference in the field of transfer alignment of inertial navigation on moving base and the application of heading angle transfer of other shipborne equipment.</p></div>","PeriodicalId":48514,"journal":{"name":"Journal of Ocean Engineering and Science","volume":"9 2","pages":"Pages 191-198"},"PeriodicalIF":7.1,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S246801332300030X/pdfft?md5=b6f653b6b5283a19d85edc7076a64d7a&pid=1-s2.0-S246801332300030X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42258225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A robust fuzzy-fractional approach for the atmospheric internal wave model 大气内波模型的一种鲁棒模糊分式方法

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-06-01 DOI: 10.1016/j.joes.2022.02.001

Parthkumar P. Sartanpara, Ramakanta Meher

引用次数: 9

Numerical simulation of time fractional Benjamin-Bona-Mahony-Burger equation describing propagation of long waves on the water surface 描述长波在水面传播的时间分数Benjamin-Bona-Mahony-Burger方程的数值模拟

IF 7.1 1区工程技术

Journal of Ocean Engineering and Science Pub Date : 2023-06-01 DOI: 10.1016/j.joes.2023.05.002

S. Ray, Gayatri Das

引用次数: 0

An efficient technique for solving fractional-order diffusion equations arising in oil pollution 求解石油污染中分数阶扩散方程的一种有效方法