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33rd International Ocean and Polar engineering Conference, ISOPE 2023

作者： Anggriani, Andi Dian Eka Mutsuda, Hidemi Nakashima, Takuji Ardianti, Andi Baso, Suandar Transportation and Environmental System Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima-shi Higashihiroshima Japan Transportation and Environmental Systems Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima-shi Higashihiroshima Japan Naval Architecture Study Program Hasanuddin University South Sulawesi Gowa Indonesia

ISBN: (纸本)9781880653807

A planing hull high-speed ferry with a stepped hull becomes a well-liked mode of water transportation for archipelago countries. On the other hand, the shape of steps on the bottom hull has not been recently taken into explicit consideration regarding the speed requirement and hydrodynamic properties. In this study, the step W shapes, were adopted to find the improved hydrodynamic performance in the planing conditions. To provide a more precise prediction of the pressure, velocity fields, and void fraction, the CFD was applied the Finite Volume Method (FVM) and coupled with Volume of Fluid Method (VOF) to capture air cavity The numerical conditions of the planing hull were trimmed by the stern with 2, and 3 degrees. This study discussed the air cavity that occurred behind the stepped area that can affect the hydrodynamic behaviour. © 2023 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Finite volume method

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Meshless generalized finite difference method with a domain-selection method for solving degenerate boundary problems

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engineering Analysis with Boundary Elements 2023年第1期152卷 185-193页

作者： Huang, Ji Lyu, Hong-Guan Fan, Chia-Ming Chen, Jiahn-Horng Naval Architecture and Shipping College Guangdong Ocean University Zhanjiang524088 China School of Ocean Engineering and Technology Sun Yat-sen University Zhuhai519082 China Doctoral Degree Program in Ocean Engineering Technology National Taiwan Ocean University Keelung20224 Taiwan Department of Harbor and River Engineering National Taiwan Ocean University Keelung20224 Taiwan Shih Yen-Ping Center for Underwater Technology National Taiwan Ocean University Keelung20224 Taiwan National Academy of Marine Research Kaohsiung80661 Taiwan

This paper is dedicated to presenting a combined Generalized Finite Difference Method (GFDM) and Domain-Selection Method (DSM) approach for solving degenerate boundary problems which are usually encountered in engineering simulations. Compared with traditional Domain-Decomposition Method (DDM), the most critical advantage of the present GFDM-DSM is that it is entirely free from matching continuous boundary conditions for different parts of the fluid domain of interest, which is sometimes hard to perform for specific situations. Instead, the only prerequisite of the present GFDM-DSM is to identify which sub-domain each computational node belongs to, and then a linear algebraic system can be assembled according to the pattern of domain-selection. Four benchmarks are performed to validate the convergence and accuracy of the present GFDM-DSM. It is shown that the present GFDM-DSM holds satisfactory accuracy for solving degenerate boundary problems. In particular, the present DSM is a flexible strategy since it can be also combined with other localized domain-type meshless methods in practical applications. © 2023 Elsevier Ltd

关键词： Domain decomposition methods

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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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Environmental sustainability criteria in the multi-oriented shipbuilding industry in Indonesia

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Australian Journal of Maritime and Ocean Affairs 2024年第4期16卷 410-430页

作者： Azhar, Ali Harahab, Nuddin Putra, Fadilla Kurniawan, Andi Department of Naval Architecture and Ship Building Faculty of Engineering and Marine Science Hang Tuah University Surabaya Indonesia Postgraduate Environmental Science Doctorate Program Brawijaya University Malang Indonesia

Preliminary studies have highlighted the potential of Indonesia's geographical, suprastructural, and infrastructural conditions to develop a strong shipbuilding industry, which is crucial for the success of the world maritime axis program and sea toll. However, despite high expectations, the industry faces challenges that threaten business sustainability, leading to bankruptcies. To assess business sustainability, it is essential to establish criteria and sub-criteria, which previous studies have overlooked, focusing only on technical and economic factors. Therefore, this research generally aims to develop and analyze environmentally friendly sustainable criteria in the multi-oriented shipyard industry so that it develops in accordance with the vision, mission, goals and strategies. The criteria development process involves identifying and reviewing relevant articles, classifying and refining the criteria, conducting expert validity testing, Pearson Product Moment validity testing, and reliability testing using the Alpha (Cronbach) method. The expert validity testing indicates that ‘people' received the highest average score of 4.67 among the criteria, and ‘infrastructure' scored the highest in the sub-criteria, with a score of 4.75. The validity testing with the Pearson Product Moment method demonstrates that the criteria and sub-criteria are valid and the reliability of 32 sub-criteria indicating their influence on promoting multi-oriented and environmentally sustainable shipbuilding industries. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Indonesia Shipyard Industry SPSS software sustainability

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Development of an Automatic Anti Pitching System (APS) Autonomous Surface Vehicle (ASV) for Fish Mapping 3

Development of an Automatic Anti Pitching System (APS) Auton...

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3rd International Conference on Science and Technology 2019, ICST 2019

作者： Saputra, Noverdo Lukmana, Muhammad Arifudin Suranto, Purwo Joko Study Program Naval Architecture Universitas Pembangunan Nasional Veteran Jakarta Indonesia Study Program Mechanical Engineering Universitas Pembangunan Nasional Veteran Jakarta Indonesia

The common problem occurs in fish mapping using autonomous surface vehicles (ASV) is pitching stability. Some researchers have indicated that problem affects the results of mapping. The target of this system is to design an Autonomous Pitching System (APS) for ASV using numerical simulation software. The simulation is done by implement APS into the system, producing an oscillatory motion from the ASV. For both dynamics of craft in short and long periods, APS with proportional controller (P), proportional-integral controller (PI), and proportional-integral-derivative controller (PID) are developed in order to minimize the oscillatory behaviour. It was found that for the short period dynamics, the APS with PI controller was the optimal controller, followed by the PID controller and then the P controller. For the long period dynamics, the APS with PID controller was optimal. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Three term control systems

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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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Structural Assessment Review of Type-C Independent Tank in LNG Bunkering Ship 1

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6th International Conference and Exhibition on Sustainable Energy and Advanced Materials, ICE-SEAM 2019

作者： Muttaqie, Teguh Lee, Seung Geon Cho, Sang-Rai Sohn, Jung Min Department of Naval Architecture and Marine System Engineering Pukyong National University Busan48513 Korea Republic of Jakarta10340 Indonesia School of Naval Architecture and Ocean Engineering University of Ulsan Ulsan Korea Republic of Interdisciplinary Program Marine Convergence Design Pukyong National University Busan48513 Korea Republic of

ISBN: (数字)9789811544811

ISBN: (纸本)9789811544804

In recent years, Liquefied Natural Gas (LNG) becomes one of the most suitable solutions to fulfil world primary eco-friendly energy demand. Consequently, bunkering ship is designed to charge liquefied gas with the increasing need for natural gas. Due to the extremely dangerous and cryogenic cargo, the design of LNG bunkering ship requires very high-level structural design/analysis technologies rather than conventional ships. Therefore, this paper describes a general procedure of the structural safety assessment for the independent type C tank of LNG bunkering ship. It aims to present a complete procedure for strength evaluation of independent type C tank including hull strength assessment. © 2020, Springer Nature Singapore Pte Ltd.

关键词： FE analysis LNG bunkering ship LNG type C tank Structural assessment review

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Integrated ship recycling industrial estate design concept for Indonesia

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IOP Conference Series: Earth and Environmental Science 2022年第1期972卷

作者： Sunaryo Bagus A Tjitrosoemarto Naval Architecture and Marine Engineering Study Program Universitas Indonesia Kampus UI Depok 16424 Indonesia.

Since the implementation of the cabotage principle, the number of Indonesian flagged ships has been increasing significantly, due to the government's incentive on importation tax for used ships. The fleet is dominated by old ships, which most of them will soon be sent for recycling. The ship recycling industry has a great opportunity for the economy of Indonesia, because of its contribution to the steel industry and job creation, but on the other hand it is also a very environmentally unfriendly industry. Currently there is no ship recycling yard complies with the requirements of international and national regulations, most of them are still implementing conventional method, and are not connected to the supporting industries. Based on these issues the study was aimed to design a concept of an integrated green and sustainable ship recycling industry estate, which has all necessary industries and facilities in it, and efficiently connected with each other. Block Plan program was used to optimize the arrangement. It is proposed that five ship recycling yards, large; medium; and smaller capacity, steel mill, waste treatment facility, electricity power plant, fresh water facility, training centre, workers accommodation, hospital, and bus terminal should be included in the estate.

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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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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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