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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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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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Experimental Evaluation on Palm Oil and Sesame Oil-based Resin Properties as Core Sandwich Material for Lightweight Ship Structure

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INTERNATIONAL JOURNAL OF ENGINEERING 2022年第9期35卷 1690页

作者： Tuswan, T. Sari, E. N. Ismail, A. Prabowo, A. R. Univ Diponegoro Dept Naval Architecture Semarang Indonesia Univ Billfath Dept Mech Engn Lamongan Indonesia Indonesia Def Univ Ship Machinery Study Program Belu Indonesia Univ Sebelas Maret Dept Mech Engn Surakarta Indonesia

Research on lightweight material on ship structure has taken giant steps during the last decade. One reason is that shipping activities have increased and, therefore, the possibility of increasing the carrying cargo capacity in a realistic way using advanced lightweight material. This article summarizes a research investigation regarding the experimental tests of vinyl ester bio resin material using palm oil and sesame oil based on Lloyd's Register (LR) standard. Several tests were conducted, including density, water absorption test, Fourier transformed infrared test (FTIR), scanning electron microscope (SEM), and mechanical tests to evaluate the effect of 2-10% addition of vegetable oils on mechanical properties. The influence of the addition of vegetable oils is successfully characterized using physical measurements, which indicate the possible formation of a polymer blend to increase in elongation value. Mechanical testing shows that adding vegetable oils causes a decrease in average density, hardness, bending strength, and tensile strength. The bending strength decreases about 9.20 - 47.06% for 2-10% palm oil addition and 5.33 - 42.40% for sesame oil addition. Moreover, vegetable oil causes a tensile strength decrease of about 5-18.75% on palm oil and 3.75-13.75% on sesame oil. As summarized, bio resin based on sesame oil has better mechanical behavior with the oil addition of 4-8% fulfills all Lloyd's Register criteria.

关键词： Bio resin Palm Oil Sesame Oil Core Sandwich Ship Structure

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Experimental investigation on the effects of zinc oxide and goethite as additives in a diesel engine fueled by pure palm oil

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CASE STUDIES IN THERMAL ENGINEERING 2024年 61卷

作者： Prahmana, Rico Aditia Darmanto, Prihadi Setyo Juangsa, Firman Bagja Reksowardojo, Iman Kartolaksono Prakoso, Tirto Hendrarsakti, Jooned Yuwazama, Zido Ahmad, Azaria Haykal Riayatsyah, Teuku Meurah Indra Fahmi, Achmad Gus Silitonga, Arridina Susan Nurcholik, Samsu Dlukha Inst Teknol Bandung Fac Mech & Aerosp Engn Doctoral Program Mech Engn Bandung 40132 Indonesia Inst Teknol Bandung Fac Mech & Aerosp Engn Thermal Sci & Engn Res Grp Bandung 40132 Indonesia Inst Teknol Sumatera Fac Ind Technol Study Program Mech Engn South Lampung 35365 Indonesia Inst Teknol Bandung Fac Ind Technol Dept Chem Engn Bandung 40132 Indonesia Inst Teknol Bandung Fac Mech & Aerosp Engn Master Program Mech Engn Bandung 40132 Indonesia Inst Teknol Sumatera Fac Ind Technol Study Program Cosmet Engn South Lampung 35365 Indonesia Univ Pertamina Fac Ind Technol Study Program Mech Engn Jakarta 12220 Indonesia Univ Technol Sydney Fac Engn & Informat Technol Ctr Technol Water & Wastewater Sch Civil & Environm Engn Sydney NSW 2007 Australia Politekn Negeri Medan Ctr Renewable Energy Dept Mech Engn Medan 20155 Indonesia Inst Teknol Kalimantan Dept Naval Architecture Balikpapan 76127 Indonesia Inst Teknol Kalimantan Res Ctr Marine Syst Emiss Control Balikpapan 76127 Indonesia Inst Teknol Bandung Res Ctr New & Renewable Energy Bandung 40132 Indonesia Univ Tokyo Dept Mech Engn 7-3-1 HongoBunkyo Ku Tokyo 1138656 Japan

Recent studies have shown the potential of zinc oxide as an additive in diesel engines because of its favorable properties. Goethite, as a metal additive, exhibits good thermodynamic stability and acts as a catalyst carrier to reduce environmental pollution. Incorporating zinc oxide microparticles and goethite nanoparticles into pure palm oil (PPaO) has great potential to improve the fuel properties. Therefore, in this study, the effects of adding zinc oxide microparticles and goethite nanoparticles into PPaO on the engine performance, spray characteristics, and smoke opacity of a diesel engine were investigated. A high-speed camera was used for the spray experiments. The results showed that the use of PPaO significantly increased the smoke opacity by similar to 127.89 % compared with diesel fuel (DF). However, the use of PPaO with zinc oxide microparticles (PPaOZnO) and PPaO with goethite nanoparticles (PPaOGOE) significantly reduced the smoke opacity. The reduction in smoke opacity was most pronounced for the PPaOGOE fuel blend, with a value of 60 %, relative to the smoke opacity for DF. The PPaOZnO fuel blend significantly increased the specific fuel consumption by 37.1 %, with an average increase of similar to 24.21 %, compared with DF at an engine load of 40 %. Moreover, the use of PPaOZnO and PPaOGOE fuel blends improved spray penetration 2 times compared to PPaO, although the relative viscosity and spray angle were similar to those for PPaO. These findings suggest that zinc oxide and goethite have great potential as additives for PPaO fuel, thereby enhancing the efficiency and performance of diesel engines.

关键词： Pure palm oil Zinc oxide Goethite Engine performance

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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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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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Finite Element Analysis and Topology Optimization Design of Anchor Mooring Winch Support Bracket

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

作者： Nurul Huda Ocid Mursid -Mechanization Fisheries Study Program Sorong Polytechnic of Marine and Fisheries Indonesia Department of Naval Architecture Diponegoro University Indonesia

The weight of the deck machinery greatly affects the position of the small ship's center of gravity so that it also affects the stability of the ship. Therefore, it is necessary to conduct optimization studies to reduce the weight of ship deck machinery, especially anchor mooring winch, by reducing the weight of ship deck machinery will lower the position of the center of gravity of ship so that can improve ship stability. This paper presents the effects of a topology optimization examination based on the finite element evaluation on anchor mooring winch support bracket using the SolidWorks Simulation module. The main intention to examine is to optimize the general weight of the anchor mooring winch support bracket via way of means of thinning specific regions of the anchor mooring winch support bracket in keeping with the calculated minimum strain energy. The topology optimization algorithm that is used in the current study gives an optimal structural shape of the support bracket of the anchor mooring winch with the largest stiffness, considering the given quantity of mass so that it will be eliminated from the preliminary layout space. The complete sequence of steps for carrying out the topology control optimization study is shown, taking into account the constraints arising from the construction features and the method of manufacturing the support bracket of the anchor mooring winch. The layout became carried out, and the effects have been provided via way of means of evaluating the preliminary version and the optimized version. As the result of topology optimization study, its stress was increased by about 4MPa and mass was reduced by about 15kg in comparison with the initial design.

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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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A critical review on structural testing and assessment of lightweight sandwich structure for ship structure application

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AIP Conference Proceedings 2023年第1期2674卷

作者： Tuswan Tuswan Abdi Ismail Achmad Zubaydi Bambang Piscesa Nadya Paramita Langening Sukma Sukma Department of Naval Architecture Institut Teknologi Sepuluh Nopember Indonesia Departement of Naval Architecture Universitas Diponegoro Semarang Indonesia Ship Machinery Study Program Faculty of Vocational Studies Indonesia Defense University Belu Indonesia Department of Civil Engineering Institut Teknologi Sepuluh Nopember 60111 Surabaya Indonesia

Many experts have lately joined the effort to study lightweight materials as an alternative solution in ship construction. However, there are limited references regarding the discussion of the current development of the lightweight material application, specifically in ship structure. The purpose of this article is to offer an overview of the present state of the art and give critical points concerning the design and requirements of sandwich applications in ship constructions. The discussion covers several topics, including the current rules/ standard of developing material issued by classification bodies, various sandwich types with different application areas, and an overview of the structural strength assessment of hybrid sandwich application on various ship structure locations. Some potential scenarios for sandwich constructions in maritime applications are also proposed.

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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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