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Reference for determining Phillip's constant values and peak enhancement factor for the use of JONSWAP spectrum in Western Java Sea waters

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RESULTS IN engineering 2025年 26卷

作者： Panalaran, Satriyo Suntoyo Sulisetyono, Aries Arifianto, Dhany Ramdhani, Andri Pratikto, Widi Agoes Inst Teknol Sepuluh Nopember Fac Marine Technol Ocean Engn Dept Surabaya 60111 Indonesia Inst Teknol Sepuluh Nopember Fac Marine Technol Naval Architecture Dept Surabaya 60111 Indonesia Inst Teknol Sepuluh Nopember Fac Ind Technol & Syst Engn Engn Phys Dept Surabaya 60111 Indonesia Inst Teknol Sumatera Fac Infrastructure Technol & Reg Dev Ocean Engn Undergraduate Program Lampung Selatan 35365 Indonesia Meteorol Climatol & Geophys Agcy BMKG Jakarta 10610 Indonesia

Several researchers have attempted to find a suitable spectrum model for Indonesian waters, but these references do not provide a common understanding of defining a spectrum model. This prompted the researcher to reassess the applicability of the wave spectrum model in Indonesia based on more appropriate data sources and systematic work procedures. This research is based on time series wave profile measurement data, which are then transformed into power spectral density curves (referred to as spectrum curves). From a number of obtained spectrum curves, this study aims to recommend key parameter values that indicate the shape of the spectrum in the western Java Sea so that it can be applied to the needs of marine building design. The procedures carried out in this study include: adjustment of the values of the key parameters of the JONSWAP spectrum (alpha and gamma);matching against a number of spectrum models;evaluation of the distribution functions to define the values of alpha and gamma;as well sensitivity test. The results of this study recommend alpha 0.99 = 0.00943 and gamma 0.99 = 2.11 for application in marine building design, as well alpha 0.5 = 0.00163 and gamma 0.5 = 1.07 for application in operational studies.

关键词： Wave spectrum Probability distribution fitting JONSWAP parameter Western Java Sea

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Toward green and sustaianable ship recycling industry in Indonesia 6

Toward green and sustaianable ship recycling industry in Ind...

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6th International Conference on Ship and Offshore Technology - Indonesia: Developments marine Design, Construction and Operation, ICSOT Indonesia 2019

作者： Sunaryo Djatmiko, E.B. Kurt, R.E. Naval Architecture and Marine Engineering Study Program Universitas Indonesia Indonesia Department of Marine Engineering Institut Teknologi Sepuluh Nopember Indonesia Department of Naval Architecture Ocean and Marine Engineering University of Strathclyde United Kingdom

ISBN: (纸本)9781713830368

The main aim of this project is to develop a sustainable, safe & environmentally sound ship recycling industry in Indonesia. As the world's largest archipelago state, it is essential for Indonesia to maintain a large fleet of ships to ensure sufficient sea transportation. However, after completing their operational life, all these ships are required to be dismantled. Currently, there is no proper understanding & infrastructure for 'Ship Recycling' in Indonesia yet. This lack of understanding causes serious contamination of the sea which results in harming the environment. Furthermore, the working conditions are extremely poor because the yards are not fit for purpose and workers are exposed to many hazards. Referring to International Maritime Organization’s Hong Kong Convention a project is carried out to preparing the process of establishing green and sustainable ship recycling industry in Indonesia by conducting gap analyses and proposing environmentally friendly ship recycling yard concept. © 2019: The Royal Institution of naval Architects.

关键词： Ships

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Electrical system design of solar-powered electrical water recreational and sport vessel 1

Electrical system design of solar-powered electrical water r...

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1st International Conference on Automotive, Manufacturing, and Mechanical engineering, IC-AMME 2018

作者： Sunaryo Shadu Imfianto, Pradhana Naval Architecture and Marine Engineering Study Program Department of Mechanical Engineering Universitas IDN Depok 16424 Indonesia

Indonesia is the world's largest archipelago with more than 17 000 islands, and the best marine tourism destination due to its beautiful beaches and underwater scenery, but Indonesia is also the most vulnerable country to be affected by climate change due to the greenhouse effect. Besides industry, the transportation sector is the highest contributor to the global greenhouse effect. In order to reduce the source of the greenhouse effect, the Indonesian Government has committed to using new and renewable energy as an alternative to fossil-based fuel. In an attempt to contribute to the Government's efforts and to advance the national marine tourism, the research is aimed to design water recreational and sport vessel that powered by a solar generated electric engine, as further development of Universitas Indonesia's solar boat participated in International Solar-boat Challenge competition in the Netherlands. The research is focused on the effective use of solar energy as the main source for powering the vessel's electrical engine, based on the existing optimum shape and dimensions of the boat. Information and data regarding the arrangement of the vessel, solar electric generation processes and vessel powering system obtained from literature study, discussion with experts, and on the spot surveys of various recreational vessels were used as input for the calculation and simulation of the vessel being investigated. The research results are expected could be further developed for other related usages such as fish farming, coastal fishing rig, floating restaurant, etc. © 2019 The Authors, published by EDP Sciences.

关键词： Greenhouse effect

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Increasing port performance through port navigation safety assessment using the formal safety assessment method (case study port of tanjung priok - Indonesia) 1

Increasing port performance through port navigation safety a...

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1st International Conference on Automotive, Manufacturing, and Mechanical engineering, IC-AMME 2018

作者： Ridwan, Sahlan Sunaryo Naval Architecture and Marine Engineering Study Program Universitas Indonesia Jl. Kampus UI Depok16424 Indonesia

The study is aimed to assess the navigation safety in the port surrounding the area as part of the Indonesian Government°s efforts to increase the port performance and minimize the cost of maritime logistics. The port navigation system and infrastructure such as vessels traffic management system, navigation lanes, port basin, quay, etc. play an important role in determining the productivity and efficiency of the port, especially in the busy port such as Tanjung Priok, Indonesia. Any accident would interrupt port activities and creates unnecessary costs. Formal Safety Assessment method, as introduced by the International Maritime Organization was implemented in the study. The assessment was carried out using qualitative and quantitative risks analyses, based on the available data and information gathered from various sources. It was identified that accidents occurred in the port waterfront were mainly due to the ships, environment, human factors, and management. Results of the assessment were then used as the basis for proposing an improvement strategy. © 2019 The Authors, published by EDP Sciences.

关键词： Navigation systems

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An era of inland water transport accidents and casualties: the case of a low-income country

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Journal of International Maritime Safety, Environmental Affairs, and Shipping 2021年第2期5卷 32-39页

作者： Mia, Md. Jobayer Uddin, Md. Imran Awal, Zobair Ibn Abdullah, Ahammad Undergraduate Student Department of Naval Architecture and Offshore Engineering Bangabandhu Sheikh Mujibur Rahman Maritime University Dhaka Bangladesh Accident Research Institute Bangladesh University of Engineering and Technology Dhaka Bangladesh Associate Professor Department of Naval Architecture and Marine Engineering Bangladesh University of Engineering and Technology Dhaka Bangladesh Chittagong Dry Dock Limited Chittagong Bangladesh

Bangladesh has a vast network of inland waterways. This allows easier and cheaper transportation to the people of this low-income nation. However, frequent accidents in inland waterways have caused significant loss of human lives and properties. This study analyzes the accident data of an era (2008–2019) collected from the Department of Shipping of Bangladesh. However, it is revealed that due to lack of a proper accident database, many accident parameters and detailed information are not available. The results indicate that most of the accidents and casualties are caused by collision among the vessels. Besides, the predominant portion of overall casualty is fatality. Moreover, 57.6% fatalities take place during the four months of February to May. Furthermore, around half of the accidents are caused by the cargo ships and trawlers. It is also found that the most accident-prone zone is the southern part of the country. Finally, some recommendations are proposed for improvement of inland water transport safety of this low-income country. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： cargo ship casualty Inland waterway accident low-income country

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Modification of traditional catamaran to reduce total resistance: configuration of centerbulb 17th

Modification of traditional catamaran to reduce total resist...

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17th International Congress of the International Maritime Association of the Mediterranean, IMAM 2017

作者： Samuel, S. Kim, D.-J. Iqbal, M. Bahatmaka, A. Prabowo, A.R. Department of Naval Architecture and Marine Systems Engineering Pukyong National University Korea Republic of Department of Naval Architecture Diponegoro University Indonesia Interdisciplinary Program of Marine Design Convergence Pukyong National University Korea Republic of

ISBN: (纸本)9780815379935

Traditional fishermen in Cilacap modify a monohull fishing vessel to be a catamaran. With the same draft, the capacity increases two times while the resistance increases almost four times than original monohull due to low S/L. The wave interference between hulls caused by low S/L increases the wave resistance leading to fuel consumption problem. This paper offers one of the solutions to overcome this problem by placing a centerbulb. The position of centerbulb is configured to get the lowest total resistance. The total resistance was analyzed using empirical formula and solved by a computational fluid dynamics (CFD) software. The results show that centerbulb configuration reduces the total resistance up to 25.76%. This is good news for the fishermen in Cilacap to modify their catamaran by adding centerbulb. © 2018 Taylor & Francis Group, London.

关键词： Computational fluid dynamics

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Bulbous bow applications on a catamaran fishing vessel for improving performance 2

Bulbous bow applications on a catamaran fishing vessel for i...

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2nd International Joint Conference on Advanced engineering and Technology, IJCAET 2017 and International Symposium on Advanced Mechanical and Power engineering, ISAMPE 2017

作者： Samuel Kim, Dong-Joon Iqbal, Muhammad Bahatmaka, Aldias Rio Prabowo, Aditya Department of Naval Architecture and Marine Systems Engineering Pukyong National University Korea Republic of Department of Naval Architecture Diponegoro University Indonesia Department of Interdisciplinary Program of Marine Design Convergence Pukyong National University Korea Republic of

This study aims to prove the usefulness of a bulbous bow traditional catamaran fishing vessel. Bulbous bow applications are widely used to reduce wave resistance. The fishing vessel resistance was calculated using CFD (Computational Fluid Dynamic) approach and combined with classical slender body theory. In this research, the application of bulbous bow was being adopted on traditional catamaran fishing vessel to reduce the total resistance. The bulbous bow has adopted based on Kracht method. Modeling procedure was developed by using linear form coefficients. The ship resistance was simulated using Tdyn software which basically Finite Element Method. The results show that adding bulbous bow can decrease or increase the ship's total resistance. © The Authors, published by EDP Sciences, 2018.

关键词： Fisheries

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A case study on research in engineering education: Designing, testing, and administering the PACES-2 survey on academic integrity

A case study on research in engineering education: Designing...

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Frontiers in Education - 35th Annual Conference 2005, FIE' 05

作者： Finelli, Cynthia J. Szwalek, Jamie L. Carpenter, Donald D. Harding, Trevor S. Center for Research on Learning and Teaching North Undergraduate Engineering Education University of Michigan Naval Architecture and Marine Engineering University of Michigan Department of Civil Engineering Lawrence Technological University Department of Manufacturing Engineering Kettering University

ISBN: (纸本)0780390776

Most engineering educators excel at planning and conducting technical research in their field, but few are proficient doing this for a project in engineering education. Recently, however, there has been increased emphasis on conducting rigorous research in engineering education. This paper provides practical advice for planning and conducting such research. The authors use their long term project to predict academic dishonesty in engineering college students as a case study representing one approach to research in engineering education. In particular, the authors present the design, testing, and administration of a two-part survey instrument to collect information from college students about their decisions related to cheating. © 2005 IEEE.

关键词： engineering education

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Applying reverse engineering principles on analysis of failures occurred in ship production

Applying reverse engineering principles on analysis of failu...

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SNAME Maritime Convention 2021, SMC 2021

作者： Karahan, Canberk Helvacioglu, Sebnem Helvacioglu, Ismail H. Türk Loydu Conformity Assessment Services Co. Istanbul Turkey Marine Engineering Program Istanbul Turkey Piri Reis University Faculty of Engineering Department of Naval Architecture and Marine Engineering Istanbul Turkey

In the current work, a new error evaluation methodology is introduced based on error analysis in ship production with reverse engineering data. The aim is to determine the errors and prevent or reduce the occurrence in other projects. First step is to compose a database of the errors;then, group the similar errors and calculate the Error Priority Number (EPN) by the evaluation of the predetermined criteria. The radar diagrams, which are suitable for representing a number of parameters having the same variables, were used to present the error groups in a simple way. The error groups were created on the diagram with the scores taken from the specific criteria. With the aid of the radar diagram, valuable information is given by presenting similarities and dissimilarities of these errors with other error groups. After examining the radar diagrams and evaluating the results, the cause and effect diagrams were prepared for these error groups from the field experts. Thus, the methodology should be customized for the shipyard to ensure maximum efficiency. © 2021 Society of naval Architects and marine Engineers (SNAME)

关键词： Shipyards

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Numerical predictions of hydrofoil sheet cavitation noise using CFD analysis

Numerical predictions of hydrofoil sheet cavitation noise us...

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39th International Congress on Noise Control engineering 2010, INTER-NOISE 2010

作者： Kim, Jong-Do Hong, Suk-Yoon Rhee, Shin-Hyung Lee, Hee-Bum Song, Jee-Hun Department of Naval Architecture and Ocean Engineering Seoul National University Seoul 151-742 Korea Republic of Program of Naval Architecture and Ocean Engineering College of Marine Technology Chonnam National University 386 Mipyeongro Yeosu Chonnam 550-749 Korea Republic of

ISBN: (纸本)9781617823961

Underwater radiated noises from marine vehicles are mostly due to the propulsion systems. Recently, the propeller noise problems are becoming crucial issues in terms of habitability of passenger ships. Especially in military area, propeller noise is directly related to thesurvivability of submarines and warships, and thus propeller noise analysis and reductions are very important. Generally, propeller noise can be classified into non-cavitation noise and cavitation noise which is dominant. In this paper, analysis of sheet cavitation noise of hydrofoil is studied as a beginning work for the propeller cavitation noise study using Computational Fluid Dynamics (CFD), and theory and numerical method are presented. Theflow field is analyzed with the Fluent system, and time dependent sheet cavitation noise is simulated assuming volume variation of cavitation as moving monopole.

关键词： Computational fluid dynamics

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