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Analysis of wave added resistance and motion response of fishing boat sailing against waves 渔船迎波航行的波浪附加阻力及运动响应分析
Sustainable Marine Structures Pub Date : 2023-03-01 DOI: 10.36956/sms.v5i1.804
Jing Wang, Yu Zhou
{"title":"Analysis of wave added resistance and motion response of fishing boat sailing against waves","authors":"Jing Wang, Yu Zhou","doi":"10.36956/sms.v5i1.804","DOIUrl":"https://doi.org/10.36956/sms.v5i1.804","url":null,"abstract":"In order to accurately predict the on-wave resistance and responses to hull motions of ships in actual sea conditions, the k-ε method of the RNG model is adopted on the basis of the unsteady RANS method. The twoformula turbulence model deals with the viscous flow, the VOF method captures the free surface, the velocity boundary method makes waves, the artificial damping method is used to eliminate waves, and the nested grid technology is used to deal with the motion response of ships on waves. Combined with the 6-DOF motion formula, a three-dimensional numerical wave cell for regular waves is established. For one example, taking a KCS Container ship and fishing boat sailing at a mid-high-speed, the increase of wave resistance and motion response at different wavelengths are analyzed, and the simulation results are compared with the experimental value, the content of strip theory in potential flow theory and the panel method to prove the reliability of CFD method in predicting ship motion.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130737224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Analysis of Splash-zone Crossing Operation for a Subsea Template 水下模板溅溅区穿越作业动态分析
Sustainable Marine Structures Pub Date : 2022-09-30 DOI: 10.36956/sms.v4i2.596
A. Amer, Lin Li, Xinying Zhu
{"title":"Dynamic Analysis of Splash-zone Crossing Operation for a Subsea Template","authors":"A. Amer, Lin Li, Xinying Zhu","doi":"10.36956/sms.v4i2.596","DOIUrl":"https://doi.org/10.36956/sms.v4i2.596","url":null,"abstract":"Subsea templates are steel structures used to support subsea well components. Normally, offshore crane vessels are employed to install them to the target location on the seabed. Crossing the splash-zone during the lowering of a subsea template is considered the most critical phase during the installation due to slamming loads and needs to be studied to provide the operational weather criterion during the planning phase. In this study, dynamic response analysis has been carried out to evaluate the allowable sea states for the plash-zone crossing phase of the subsea templates. The numerical model of the lifting system, including the crane vessel and the subsea template, is firstly built in the state-of-the-art numerical program SIMA-SIMO. Then, dynamic analysis with time-domain simulations is carried out for the lifting system under various sea states. The disturbed wave field due to the shielding effects from the installation vessel is considered when calculating the hydrodynamic forces on the template. Statistical modelling of the dynamic responses from different wave realizations is used to estimate the extreme responses of various sea states. The application of the generalized extreme value distribution and Gumbel distribution in fitting the extreme responses is discussed. Moreover, the influence of the shielding effects from the vessel, as well as the influence of the changing size of the suction anchor on the hydrodynamic responses and the allowable sea states are studied.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131589010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Current Status and Future Trends for Mooring Systems of Floating Offshore Wind Turbines 海上浮式风力发电机系泊系统的现状与发展趋势
Sustainable Marine Structures Pub Date : 2022-09-22 DOI: 10.36956/sms.v4i2.617
Ruyan Yang, X. Zheng, Jinlu Chen, Yufei Wu
{"title":"Current Status and Future Trends for Mooring Systems of Floating Offshore Wind Turbines","authors":"Ruyan Yang, X. Zheng, Jinlu Chen, Yufei Wu","doi":"10.36956/sms.v4i2.617","DOIUrl":"https://doi.org/10.36956/sms.v4i2.617","url":null,"abstract":"With the increasing demand of energy and the limitation of bottom-fixed wind turbines in moderate and deep waters, floating offshore wind turbines are doomed to be the right technical choice and they are bound to enter a new era of rapid development. The mooring system is a vital system of a floating wind turbine for station-keeping under harsh environmental conditions. In terms of existing floating wind turbine projects, this paper is devoted to discussing the current status of mooring systems and mooring equipment. This paper also presents the mooring analysis methods and points out the technical difficulties and challenges in mooring design, installation, operation and maintenance stages. Finally, the developing trends of the mooring system are summarized, aiming to provide a reference for future mooring research.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132038714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Marine Structures under Special Loads 特殊荷载下的海洋结构
Sustainable Marine Structures Pub Date : 2022-08-25 DOI: 10.36956/sms.v4i2.669
Chandrasekaran Srinivasan
{"title":"Marine Structures under Special Loads","authors":"Chandrasekaran Srinivasan","doi":"10.36956/sms.v4i2.669","DOIUrl":"https://doi.org/10.36956/sms.v4i2.669","url":null,"abstract":"Copyright © 2022 by the author(s). Published by Nan Yang Academy of Sciences Pte Ltd. This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License. (https://creativecommons.org/licenses/ by-nc/4.0/). DOI: http://dx.doi.org/10.36956/sms.v4i2.669 *Corresponding Author: Chandrasekaran Srinivasan, Madras Institute of Technology, India; Email: drsekaran@iitm.ac.in EDITORIAL Marine Structures under Special Loads","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124416906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural Integrity Analysis of Containers Lost at Sea Using Finite Element Method 基于有限元法的失海集装箱结构完整性分析
Sustainable Marine Structures Pub Date : 2022-04-30 DOI: 10.36956/sms.v4i2.505
S. Oterkus, Bingquan Wang, E. Oterkus, Y. Galadima, Margot Cocard, Stefanos Stefanos, Jami Buckley, Callum McCullough, Dhruv Boruah, Bob Gilchrist
{"title":"Structural Integrity Analysis of Containers Lost at Sea Using Finite Element Method","authors":"S. Oterkus, Bingquan Wang, E. Oterkus, Y. Galadima, Margot Cocard, Stefanos Stefanos, Jami Buckley, Callum McCullough, Dhruv Boruah, Bob Gilchrist","doi":"10.36956/sms.v4i2.505","DOIUrl":"https://doi.org/10.36956/sms.v4i2.505","url":null,"abstract":"Unlike traditional transportation, container transportation is a relatively new logistics transportation mode. Shipping containers lost at sea have raised safety concerns. In this study, finite element analysis of containers subjected to hydrostatic pressure, using commercial software ANSYS APDL was performed. A computer model that can reasonably predict the state of an ISO cargo shipping container was developed. The von Mises stress distribution of the container was determined and the yield strengthwas adopted as the failure criterion. Numerical investigations showed that the conventional ship container cannot withstand hydrostatic pressure in deep water conditions. A strengthened container option was considered for the container to retain its structural integrity in water conditions.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122129875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of Potential Theory and Morison Equation for Deformable Horizontal Cylinders 可变形水平圆柱的势理论与莫里森方程的比较
Sustainable Marine Structures Pub Date : 2022-03-30 DOI: 10.36956/sms.v4i2.492
C. Jin
{"title":"Comparison of Potential Theory and Morison Equation for Deformable Horizontal Cylinders","authors":"C. Jin","doi":"10.36956/sms.v4i2.492","DOIUrl":"https://doi.org/10.36956/sms.v4i2.492","url":null,"abstract":"This study investigates the hydro-elastic behaviors of fully submerged horizontal cylinders in different regular waves. Two methods were proposed and compared in this study. The first method was based on potential theory in frequency domain and the discrete-module-beam (DMB) method, which discretizes a floating elastic structure into a sufficient number of rigid bodies while simultaneously representing the elastic behavior from beam elements with Euler-Bernoulli beam and Saint-Venant torsion. Moreover, the Morison method in time domain was employed; this method estimates wave forces from the semi-empirical Morison equation, and the elastic behavior is embodied by massless axial, bending, and torsional springs.Various parametric studies on cylinder diameter, submergence depth, and wave direction were conducted. Wave forces, dry/wet mode shapes/natural frequencies, and dynamic motions are presented and analyzed.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115373990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Functionally graded material and its application to marine structures 功能梯度材料及其在海洋结构中的应用
Sustainable Marine Structures Pub Date : 2022-02-24 DOI: 10.36956/sms.v4i1.490
S. Chandrasekaran, H. S
{"title":"Functionally graded material and its application to marine structures","authors":"S. Chandrasekaran, H. S","doi":"10.36956/sms.v4i1.490","DOIUrl":"https://doi.org/10.36956/sms.v4i1.490","url":null,"abstract":"Marine structures are exposed to harsh weather conditions, demanding special pre-requisites in design and functional perspectives. Under dynamic loads of larger magnitude, the material-centric design procedure alone is not feasible to ensure the safe disbursement of loads. The compliant offshore structures resist loads primarily by their geometric novelty, and hence their design is form-dominant and no more strength (material) dominant. Large displacements in the rigid body modes in the horizontal plane under lateral loads require their construction material to possess enough ductility to absorb this energy. Steel is one of the most competitive materials for marine structures as it offers good ductility, but corrosion in the marine environment is a major concern. It undergoes strength and functional degradations and therefore requires serious investigation. In the present study, functionally graded material (FGM) is proposed to substitute for steel in marine applications. The method of fabricating FGM and assessing its mechanical and durability properties are discussed. Results show that FGM possesses strength and durability properties at par with the conventionally used X52 steel for marine risers. The presented study will be a major initiative towards future research in exploring competent materials which will be strong and sustainable in the marine environment.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117204109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal and Structural Behaviour of Offshore Structures with Passive Fire Protection 被动防火海上结构的热性能和结构性能
Sustainable Marine Structures Pub Date : 2022-01-20 DOI: 10.36956/sms.v4i1.476
E. Oterkus, Sa Jo
{"title":"Thermal and Structural Behaviour of Offshore Structures with Passive Fire Protection","authors":"E. Oterkus, Sa Jo","doi":"10.36956/sms.v4i1.476","DOIUrl":"https://doi.org/10.36956/sms.v4i1.476","url":null,"abstract":"In offshore structures, hydrocarbon fires cause the structure to loose its rigidity rapidly and this leads to structural integrity and stability problems. The Passive Fire Protection (PFP) system slows the transfer rate of fire heat and helps to prevent the collapse of structures and human losses. The vital design factors are decided in the detailed design stage. The determined design thickness must be accurately applied in the fabrication yard. However, there are many cases that the PFP is overused because of various reasons. This excessive application of the PFP is an unavoidable problem. Several studies have been conducted on the efficient application and optimal design of the PFP. However, the strength of the PFP has not been considered. In addition, research studies on the correlation between the thickness of the PFP and the structural behaviour are not widely available. Therefore, this study attempts to analyse the thermal and mechanical effects of the PFP on the structure when it is applied to the structural member. In particular, it is intended to determine the change in the behaviour of the structural member as the thickness of the PFP increases.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122902009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of Peridynamics in Marine Structures 周动力学在海洋结构中的应用
Sustainable Marine Structures Pub Date : 2022-01-06 DOI: 10.36956/sms.v4i1.475
E. Oterkus
{"title":"Applications of Peridynamics in Marine Structures","authors":"E. Oterkus","doi":"10.36956/sms.v4i1.475","DOIUrl":"https://doi.org/10.36956/sms.v4i1.475","url":null,"abstract":"Marine environment is a harsh and challenging environment for both operators and analysers due to extreme weather conditions. As a result of these conditions, marine structures are subjected to extreme and/or cyclic loadings. This will then lead to various different damage modes including corrosion and fatigue. Such damage modes are major threats to the reliability and integrity of marine structures which can cause risk on human and environmental safety, and yield financial losses. Moreover, climate change is a major concern which requires urgent attention. In order to minimize the negative effects of climate change, energy transition from utilisation of fossil fuels to greener energy solutions, such as offshore wind, should be adapted. There is currently a rapid progress on investment on green technologies especially offshore wind energy generation. Another emerging area is hydrogen which is considered as the environmentally friendly fuel of the future. ","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127016456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abundance and Distribution, Growth Pattern, Sex Ratio and Gonadosomatic Index (GSI) of Liza falcipinnis (Valenciennes, 1836) from Ojo Axis of Badagry Creeks, Lagos, Nigeria 尼日利亚拉各斯Badagry溪Ojo轴Liza falcipinnis (valciennes, 1836)的丰度、分布、生长格局、性别比和性腺指数(GSI
Sustainable Marine Structures Pub Date : 2021-09-27 DOI: 10.36956/sms.v3i2.434
Adeboyejo, O.A., C. E.O, Hammed, A.M., W. O.O., Abayomi, J.P., Olarewaju, O.M.
{"title":"Abundance and Distribution, Growth Pattern, Sex Ratio and Gonadosomatic Index (GSI) of Liza falcipinnis (Valenciennes, 1836) from Ojo Axis of Badagry Creeks, Lagos, Nigeria","authors":"Adeboyejo, O.A., C. E.O, Hammed, A.M., W. O.O., Abayomi, J.P., Olarewaju, O.M.","doi":"10.36956/sms.v3i2.434","DOIUrl":"https://doi.org/10.36956/sms.v3i2.434","url":null,"abstract":"A study on seasonal abundance, morphometric and meristic data, growth pattern, condition factor, sex ratio and gonadosomatic index of Liza falcipinnis (Valenciennes, 1836) from the Ojo axis of Badagry creek, Nigeria was conducted from May 2019 to March 2020. A total of 1012 species were randomly selected, having 499 females and 513 males. The length frequency analysis and length-weight relationships (LWR) were determined. Sex ratio was determined by Chi-square analysis. The results showed that morphometric data are: 0.5 - 2.5 mm for ED, 2.1 - 12 mm for HL, 1.7 - 8.1 mm for HD, 2.5 - 11.7 for BD, 2.6 - 233.3 mm for TL and 9.23 - 1006 g for BW for the combined sexes. The slope (b) shows an allometric growth pattern. The intercept ‘a’ and slope ‘b’ of the LWR (LogW = a + bLogL) were Log W=15.39+ 0.34 LogL (r= 0.54) for combined sexes, Log W= 12.49+ 0.02 log L (r= 0.38) for males and Log W= 18.23+ 0.01 log L (r=0.16) for females.The length frequency distribution indicated that species were dominated by two year classes (Ages 1 and 2). Condition factors were generally low. The values ranged between 0.68 - 0.85 for combined sexes. The gonadosomatic index for female was highest in August, 2019 (17.77%) with Mean±SD of 2.88±0.75; which indicated the peak of spawning period in the study area.Sex ratio difference was significant (P<0.05). Sexual differences were significant; the females are phenotypically larger than the male.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131200549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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