Sustainable Marine Structures最新文献

Numerical Simulations of the Pitching Airfoil by Using Discrete Vortex Method 使用离散涡流法对俯仰翼进行数值模拟

Sustainable Marine Structures Pub Date : 2023-10-31 DOI: 10.36956/sms.v5i2.944

Peng Ren, Ke Lin, Jiasong Wang

引用次数: 0

Dynamic Assessment of OWT under Coupled Seismic and Sea-wave Motions 地震-海波耦合作用下OWT的动力评价

Sustainable Marine Structures Pub Date : 2023-09-29 DOI: 10.36956/sms.v5i2.884

Maryam Massah Fard, Ayfer Erken, Atilla Ansal

{"title":"Dynamic Assessment of OWT under Coupled Seismic and Sea-wave Motions","authors":"Maryam Massah Fard, Ayfer Erken, Atilla Ansal","doi":"10.36956/sms.v5i2.884","DOIUrl":"https://doi.org/10.36956/sms.v5i2.884","url":null,"abstract":"The effect of soil-monopile-structure interaction is of great importance in the design of offshore wind turbines (OWTs). Although sea waves play the most effective role in the performance of OWTs, the coupled effect of sea-wave loads and seismic motion on the performance of the OWT system in seismic-prone areas is a factor that is less investigated and should not be ignored. In this regard, a 2-D porous model based on Biot’s poro-elastic theory is considered to capture the pore water pressure generation in the soil domain surrounding the OWT foundation. The coupled effect of sea waves and seismic motion through a comparative study is considered for the reference OWT system based on the monopile foundation by using the FE program, OpenSees. The results of the analyses are presented in specific locations. Upon the obtained results, the dynamic behavior of the OWT system and the possibility of liquefaction in the soil surrounding the OWT during applied loads are investigated and compared. This comparison is a good representative of the effect of the seismic motion on the performance of the OWT system and the soil medium by considering soil-monopile-structure interaction in seismic-prone areas.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135295893","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

Offshore Fish Farming: Challenges and Recent Advancements 近海养鱼:挑战和最新进展

Sustainable Marine Structures Pub Date : 2023-09-24 DOI: 10.36956/sms.v5i2.949

Lin Li

引用次数: 0

Design Basis Considerations for the Design of Floating Offshore Wind Turbines 海上浮式风力发电机组设计依据及考虑

Sustainable Marine Structures Pub Date : 2023-09-16 DOI: 10.36956/sms.v5i2.913

Ove Tobias Gudmestad, Anja Schnepf

引用次数: 0

Assist in GHG Abatement of Offshore Ships: Design and Economic Analysis of an Integrated Utilization Model of hydrogen-powered Ship and Offshore Wind Power 助力近海船舶温室气体减排:氢动力船舶与海上风电综合利用模式设计与经济分析

Sustainable Marine Structures Pub Date : 2023-08-23 DOI: 10.36956/sms.v5i2.877

Xinyu Liu, Guogang Yang, Baixun Sun, Hao Wang, Yue Li, Renjie Wang

{"title":"Assist in GHG Abatement of Offshore Ships: Design and Economic Analysis of an Integrated Utilization Model of hydrogen-powered Ship and Offshore Wind Power","authors":"Xinyu Liu, Guogang Yang, Baixun Sun, Hao Wang, Yue Li, Renjie Wang","doi":"10.36956/sms.v5i2.877","DOIUrl":"https://doi.org/10.36956/sms.v5i2.877","url":null,"abstract":"As a hopeful solution to help the shipping sector achieve the greenhouse gas (GHG) abatement goal of the IMO by 2050, the application of hydrogen-powered ships has attracted more and more attention. To solve the problem of hydrogen supplement for offshore polymer electrolyte membrane fuel cell (PEMFC) ships, this paper presents a scenario design for the integrated application of coastal hydrogen-powered ships and offshore wind power, and analyzes its techno-economic feasibility. This model concept considers the problems in offshore hydrogen transportation and offshore wind power development together. It provides a feasible integrated scheme and operation mode for the combination of offshore wind power and hydrogen energy storage. A transformation scheme is also provided for the marine ranch ships, and these PEMFC-powered ships are combined with the hydrogen production of offshore wind farms. The analysis results show that the integrated utilization model is economically feasible and with a significant effect on decarbonization. It also shows great potential for further expansion to other coastal areas.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128456680","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

Enhancing Friction Stir Welding in Fishing Boat Construction through Deep Learning-Based Optimization 基于深度学习优化的渔船搅拌摩擦焊接技术

Sustainable Marine Structures Pub Date : 2023-08-19 DOI: 10.36956/sms.v5i2.875

E. Maleki, O. Unal, Seyed Mahmoud Seyedi Sahebari, K. Reza Kashyzadeh, N. Amiri

{"title":"Enhancing Friction Stir Welding in Fishing Boat Construction through Deep Learning-Based Optimization","authors":"E. Maleki, O. Unal, Seyed Mahmoud Seyedi Sahebari, K. Reza Kashyzadeh, N. Amiri","doi":"10.36956/sms.v5i2.875","DOIUrl":"https://doi.org/10.36956/sms.v5i2.875","url":null,"abstract":"In the present study, the authors have attempted to present a novel approach for the prediction, analysis, and optimization of the Friction Stir Welding (FSW) process based on the Deep Neural Network (DNN) model. To obtain the DNN structure with high accuracy, the most focus has been on the number of hidden layers and the activation functions. The DNN was developed by a small database containing results of tensile and hardness tests of welded 7075-T6 aluminum alloy. This material and the production method were selected based on the application in the construction of fishing boat flooring, because on the one hand, it faces the corrosion caused by proximity to sea water and on the other hand, due to direct contact with human food, i.e., fish etc., antibacterial issues should be considered. All the major parameters of the FSW process, including axial force, rotational speed, and traverse speed as well as tool diameter and tool hardness, were considered to investigate their correspondence effects on the tensile strength and hardness of welded zone. The most important achievement of this research showed that by using SAE for pre-training of neural networks, higher accuracy can be obtained in predicting responses. Finally, the optimal values for various welding parameters were reported as rotational speed: 1600 rpm, traverse speed: 65 mm/min, axial force: 8 KN, shoulder and pin diameters: 15.5 and 5.75 mm, and tool hardness: 50 HRC.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133517347","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

Vibration Isolation Characteristics of Impedance-balanced Ship Equipment Foundation under Unbalanced Excitation 不平衡激励下阻抗平衡舰船设备基础隔振特性研究

Sustainable Marine Structures Pub Date : 2023-06-30 DOI: 10.36956/sms.v5i1.856

Yuxuan Qin, Yinbing Wang, Fuzhen Pang, Zhiqi Fu, Haichao Li

{"title":"Vibration Isolation Characteristics of Impedance-balanced Ship Equipment Foundation under Unbalanced Excitation","authors":"Yuxuan Qin, Yinbing Wang, Fuzhen Pang, Zhiqi Fu, Haichao Li","doi":"10.36956/sms.v5i1.856","DOIUrl":"https://doi.org/10.36956/sms.v5i1.856","url":null,"abstract":"A new type of impedance-balanced ship equipment foundation structure based on the principle of impedance balancing using a “discontinuous panel-vibration isolation liquid layer-foundation structure” is proposed to solve the problem of poor low-frequency vibration isolation of the foundation under unbalanced excitation of shipboard equipment. Based on the finite element method, the influence of characteristic parameters of the foundation panel structure on its vibration reduction characteristics under unbalanced excitation is explored. The results show that the vibration isolation level of the impedance-balanced foundation is 10 dB higher than the traditional foundation in the low-frequency band of 10-500 Hz when subjected to combined excitation of concentrated force and moment. Increasing the thickness of the impedance-balanced foundation panel can enhance the isolation effect. Increasing the number of sub-panels can effectively reduce the vibration response of the foundation panel and enhance the isolation performance of the foundation. The connection stiffness between sub-panels has a small effect on the isolation performance of the foundation.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126517343","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

The Role of Chittagong Port Authority to Develop Other National Ports in Bangladesh to Provide Maritime Logistics Support in South Asia 吉大港港务局在发展孟加拉国其他国家港口以提供南亚海上物流支持方面的作用

Sustainable Marine Structures Pub Date : 2023-05-16 DOI: 10.36956/sms.v5i1.824

Razon Chandra Saha

{"title":"The Role of Chittagong Port Authority to Develop Other National Ports in Bangladesh to Provide Maritime Logistics Support in South Asia","authors":"Razon Chandra Saha","doi":"10.36956/sms.v5i1.824","DOIUrl":"https://doi.org/10.36956/sms.v5i1.824","url":null,"abstract":"Chittagong Port is the principal seaport in Bangladesh that has contributed to the national economy with the opportunity to be a world-class regional port in South Asia. Cooperation among the three national ports Chittagong, Mongla and Payra is essential to do maritime logistics business in the region after serving the nation proudly. Here, Chittagong Port Authority (CPA) has the opportunity to help others in the process of port development for increasing efficiency and productivity by providing financial and technical assistance because of its financial and technical capabilities as a pioneer seaport in the port world. This paper examines the role of CPA to bolster and develop the underutilized Mongla Port and newly established Payra Port, where qualitative research methodology is applied to explore the ways, by which CPA can assist, link and integrate with others effectively, especially in developing the port infrastructure and inland transport networks. In addition, the research found the prospectus of Mongla and Payra to supply port services to the neighbors India, Nepal, and Bhutan as well as serve the South-West part of China with the aim of increasing regional connectivity and promoting international trade in those basically landlocked areas and countries of Asia.","PeriodicalId":215374,"journal":{"name":"Sustainable Marine Structures","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122231372","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

Environmental Assessment of Coastal Sand Mining Using Proposed DPSIR Criteria: A Case of Hai Phong 采用拟议DPSIR标准的海岸采砂环境评价:以海防为例

Sustainable Marine Structures Pub Date : 2023-03-18 DOI: 10.36956/sms.v5i1.812

D. T. Huong, Do Gia Khanh, N. Thao, Lan Dinh Tran

引用次数: 0

Harvesting Offshore Renewable Energy an Important Challenge for the European Coastal Environment 收集近海可再生能源是欧洲沿海环境面临的重要挑战

Sustainable Marine Structures Pub Date : 2023-03-09 DOI: 10.36956/sms.v5i1.822

Eugen Rusu

引用次数: 0