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

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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study of Utilization Plastic Waste as Basic Material for Boat Manufacturing Using Eco-green Design Concept

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IOP Conference Series: Materials Science and Engineering 2021年第1期1125卷

作者： S Noverdo N Iswadi R Reda S Bambang P. Muayyad Studi Program Naval Architecture Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Indonesia Study Program Industrial Engineering Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Indonesia Naval Architecture & Ship Builder-PT Venta Technology Industri Jakarta Indonesia

The plastic waste problem has become a global problem and the effect on the environment is horrible. Almost all countries make an effort to reduce their daily utilization. Environmental organizations and researchers are also performing research to find ways to recycle plastic waste. In this paper introduces the 'Eco-green Design Concept' to utilize plastic waste (type 2) as fishing boat material. This concept will recycle 3 tonnes of plastic waste into the material of a fishing boat. In addition, the implementation element of eco-green design concept (design quality (D), Environmental Friendly (E), Eco-green Material (G)) into the design of fishing vessels has been successful. The concept does not only utilize type 2 plastic waste into the hull of the ship, but the design of the ship is made to have small resistance, good stability and has a large cargo area. And also has a machine that is environmentally friendly and does not cause pollution.

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AUXILIARY SHIP HULL FORM DESIGN AND RESISTANCE PREDICTION

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naval ENGINEERS JOURNAL 1988年第3期100卷 275-292页

作者： FUNG, SC The author is a naval architect with the Preliminary Design Division of the Naval Sea Systems Command. Mr. Fung graduated from National Cheng Kung University in 1976 and Stevens Institute of Technology in 1977 from which he received his B.S. degree in naval architecture and marine engineering and M.S. degree in ocean engineering respectively. He started his career with M. Rosenblatt and Son in 1979 and became a senior naval architect with the Hull Form & Hydrodynamics Department in Designers and Planners in 1981. For the past ten years Mr. Fung has performed a variety of tasks in the area of feasibility study hydrodynamic design including advanced marine vehicles bulbous bows and hull form design for surface combatant and non-combatant ships. Currently he is a project naval architect for the T-AO twin skeg integrated hull design and the AE-36 Energy Enhancement Program. Mr. Fung is a member of ASE ASNE and SNAME. He received the John C. Niedermair A ward in 1984 and 1986 for the best paper presented at the ASE annual technical symposiums.

In this paper 154 auxiliary type monohull designs are analyzed for guidance on how to select the appropriate hull form parameters, particularly with regard to the effects of hull section shapes, sectional area and design waterline curves on ship resistance. This paper also discusses the resistance predictions based on (1) the statistical approach and (2) the use of series model test data (such as Taylor's standard series) and associated “worm curve factors” with the help of data management software.

关键词： SHIPS

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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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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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The Jimmie Hamilton Award

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naval Engineers Journal 1971年第3期83卷 36-38页

作者： NACHTSHEIM, JOHN J. BALLOU, L. DENNIS John J. Nachtsheim:is currently the Deputy Assistant Administrator for Research & Development for the Maritime Administration. His duties are the planning coordinating organizing evaluating and directing of the R&D activities of MarAd. His past experiences include: Naval Architect for the Naval Ship Engineering Center 1959 Deputy Chief Design Engineer for the Puget Sound Naval Shipyard 1958 to 1959 and Naval Architect the former Bureau of Ships 1948 to 1958. His education is comprised of a B.S. degree from the Webb Institute of Naval Architecture an L.L.B. degree from the George Washington University Law School completion of the Advanced Management Program at Harvard University and current study of Transportation at the American University. He is a Registered Professional Engineer in the District of Columbia and a Member of the Bar in the District of Columbia and the State of Maryland. In addition to ASNE his other professional memberships include the Society of Naval Architects and Marine Engineers the Society of Aeronautical Weight Engineers and the Association of Senior Engineers of the Naval Ships Systems Command (Honorary). USN Commander L. Dennis Ballou: USN is the Head of the Engineering Service Office Naval Ship Engineering Center. He is involved in computer hardware and software services to support engineering design automatic data processing systems design work study and quality assurance. Prior to NavSec duty Commander Ballou served in various billets afloat and ashore: tours on the USS Skagit and Tang supervision of the USS Skipjack's first overhul construction of the USS Nathanael Greene and helping to establish the Polaris overhaul program. He is a graduate of the U.S. Naval Academy Officers' Submarine School and the Webb Institute of Naval Architecture. He holds BS and MS degrees in marine engineering and naval architecture respectively. He has also completed many graduate

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Assessment of debonding failures in the sandwich plate of stern ramp door of ferry Ro-Ro using k-nearest neighbor algorithm

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AIP Conference Proceedings 2023年第1期2674卷

作者： Safri Adam Tuswan Tuswan Abdi Ismail Achmad Zubaydi Bambang Piscesa Aditya Rio Prabowo Information Technology Study Program Politeknik Aisyiyah Pontianak 78114 Pontianak Indonesia Department of Naval Architecture Institut Teknologi Sepuluh Nopember 60111 Surabaya Indonesia Department 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 Department of Mechanical Engineering Universitas Sebelas Maret Indonesia Surakarta Indonesia

The difficulty in controlling the proper bonding during manufacturing sandwich for ship structure is a major problem. One of the damage types that often occurs is debonding caused by the lack of the adhesive layer bond between the two faceplate materials and the sandwich core at the centre. Furthermore, the identification of damage in ship structure becomes essential to ensure the structural integrity and security issues. Based on the issues above, damage identification on the sandwich plate of Ferry Ro-Ro with several debonding ratios using the k-NN algorithm was proposed. The cross-validation method was used to check the validity of the proposed algorithm model in practice. The proposed models were analyzed with various k-fold values, k-NN values, and number of iterations to investigate the influence of the those parameters on the accuracy of the model. From the result, it can be found that increasing k-fold value is the best strategy to increase the accuracy of the model. However, increase number of neighbors (k) caused a bias so that the accuracy decreased. The tests resulted in the highest accuracy of 97.60% obtained at k-fold 11 with k=3 and 90 iterations. It can be summarized that the large number of k-folds and small k-NN parameters do not require large iterations to obtain high prediction results.

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ADVANCED AVIONICS architecture - THE NAVAIR study

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naval ENGINEERS JOURNAL 1994年第6期106卷 31-40页

作者： KATZ, RS JAHNKE, L JEWETT, CE Cdr. Larry Jahnke USN:is presently Head of the Architecture Branch of the Avionics Engineering division AIR-546 of the Naval Air Systems Command. Among his current responsibilities is to lead implementation activities of the NAVAIR Advanced Avionics Architecture study described in this paper. Cdr. Jahnke graduated from the University of Minnesota with a B.S. degree in aeronautical engineering and was commissioned in 1974. After flight training as a Naval flight officer he was assigned to Naval Air Station Barbers Point Hawaii where he served as Tactical Coordinator for P-3B aircraft. He was assigned to the Communications Directorate of the Joint Staff in 1990 where he participated in support of Desert Shield/Desert Storm and was part of the original cadre of officers responsible for the “C41 for the Warrior” concept. Cdr. Jahnke also has a Master of Science degree from the University of Southern California and is a 1990 graduate of the Industrial College of the Armed Forces. Cdr. Charles E. Jewett USN:is currently the Common Avionics Requirements Officer for Naval Aircraft Programs. He has served the Navy as an Aeronautical Engineering Duty Officer since 1982 with previous defense acquisition assignments as the Avionics Architecture and Engineering Branch Head Fighter/Attack Avionics systems Engineering Branch Head and A-12 Avionics Officer and A-6F Deputy Program Manager and the A-6 Avionics Officer. Cdr. Jewett entered the Navy as an Aviation Officer Candidate in 1971 receiving his commission and earning his wings as a Naval Flight Officer the same year. After graduating from the U.S. Naval Test Pilot School in 1976 he was assigned to the Strike Aircraft Test Directorate of the Naval Air Test Center where he participated in various electronic warfare electro-optics and software update evaluations for A-6 EA-6B and OV-10 aircraft. In Cdr. Jewett's previous assignment at NAVAIRSYSCOM he led a major Avionics Architecture Study (the subject of this paper) that surveyed cutting-edge avionics technol

To establish a planning basis for future avionics systems, the naval Air Systems Command (NAVAIR) conducted an avionics architecture investigation during 1992-1993, culminating in a final report published in August 1993. In the course of the study, U.S. Industry provided significant information to a NAVAIR avionics database for both technologies and systems integration methods. From the study emerged an implementation strategy to allow NAVAIR to develop effective avionics systems in the future that use commercial products and standards where applicable but also allow the ready use of new and emerging technologies. Recommended strategies concentrate on the development process, especially the use of sound systems engineering techniques and the maximum practical use of commercial standards and products. This paper reviews the methodology employed during the NAVAIR investigation, and presents the key findings and resulting implementation strategies. The paper concludes with a brief summary of current implementation plans at NAVAIR.

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OPERATOR AND ENGINEER - PARTNERS IN naval SHIP DESIGN

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naval ENGINEERS JOURNAL 1973年第3期85卷 33-48页

作者： GRAHAM, C THE AUTHOR is presently serving as the Engineering Officer of the USS Gridley (DLG-21). He reported to this billet in November 1971 and has made a deployment operating in the Gulf of Tonkin with the Seventh Fleet and has managed a distillate fuel conversion and a complex overhaul. Previous to this assignment he spent two years at the Naval Ship Engineering Center Hyattsville Md. serving as Assistant Design Manager for the DLGN 38 Project Design Manager for the PCE design NAVSEC Project Coordinator for the DD 963 Program and Director of a Comparative Naval Architecture Study. As an Ensign he served on two destroyers the USS Charles R. Ware (DD-865) and the USS Richard E. Byrd (DDG-23). He is a graduate of the U.S. Naval Academy and the Massachusetts Institute of Technology where he received his Ph.D. in Mechanical Engineering. He is an active member in ASNE and a frequent contributor to the Journal.

Today, due to the extreme complexity of modern naval ships, there is a need for the Ship Designer and Ship Operator to work together as partners in designing combatant ships. The ship design process consists of a continual series of “trade off” decisions where one feature is balanced against another. The Ship Designer (PRODUCER) and the Operator (CUSTOMER) must make these decisions together. This paper addresses a number of important design factors which the Engineer and Operator should keep in mind; namely, the meaning and cost of ship performance, the importance of life cycle cost, and the effect of the design spiral. Specific examples are cited explaining the impact that compromises between several performance features can have on a ship design. The message emphasized is that ship performance never comes cheaply and that the Engineer and Operator are in the best positions to make the difficult decisions necessary to produce a balanced ship design.

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TECHNOLOGICAL ADVANCES IN AIRCRAFT CARRIER DESIGN

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naval ENGINEERS JOURNAL 1980年第5期92卷 71-85页

作者： REIN, RJ RYAN, JC USN (RET.) Cdr. Robert J. Rein USN (Ret.)currently is the Director of Naval Support Systems for the Columbia Research Corporation Washington D. C. At the time this paper was presented he was on active duty in the U.S. Navy serving as the Ship Design Manager for the CVV Naval Sea Systems Command. Prior to that his duty assignments included Deputy Program Manager for the Sea Control Ship Assistant Ship Material Officer. Staff of Commander Naval Air Force U.S. Pacific Fleet and Type Desk Officer for Cruisers/Destroyers and New Construction (CG 30) at the former Hunter's Point Naval Shipyard. He is a graduate of General Motors Institute an accredited private college sponsored by the General Motors Corporation: the U.S. Naval Postgraduate School Monterey. Calif.: and the Defense Systems Management College. Fort Belvoir. Va. Additionally. he has had extensive postgraduate study in Systems Management at The George Washington University. Cdr. Rein is extremely active in his support of professional engineering societies and as a member of ASNE since 1964 has been responsible for the founding of ASNE Local Sections on the west coast and presently is serving as the Society's National Assistant Secretary-Treasurer. In addition he also was the creator and coordinator for the highly successful. Society sponsored Symposium “Aircraft Carriers — Present and Future.”which was held in October 1976 at the U.S. Grant Hotel. San Diego. Calif. and was the first such Symposium jointly sponsored by an Operating Fleet command and a professional society. Mr. J. Christopher Ryanreceived his B.S. degree in Naval Architecture and Marine Engineering from Webb Institute of Naval Architecture in 1967 and his M.S. degree in Naval Architecture from Massachusetts Institute of Technology in 1969. His initial work experience was at Litton Ship Systems where he was associated primarily with the general arrangements development of the DD 963 Class design. Subsequently. he was employed at the former Naval Ship Engineering Center with work as

Since the signing of the Contract Design Plane for the CVN 68 (the U.S. Navy's latest Class of Aircraft Carriers) In 1963, considerable technological advances have been made in naval Ship Design. This paper provides specific examples of how new technology has affected traditional Carrier design practices and techniques, and also indicates areas where future advanced technology will be needed. It is divided into four sections: 1) Computer Design Application; 2) Total Ship Energy Conservation Analysis; 3) Advances in Structural Design; and 4) Impact of V/STOL Aircraft. The increased use of the computer to define ship characteristics in the initial stage of ship design is discussed, followed by a report on efforts to include energy conservation as an integral part of the design process. The energy conservation approach uses traditional analytical techniques to develop innovative design configurations that will achieve energy savings. Of the many advances in Carrier structural design, two specific examples are given: 1) Elimination of the infamous “knee-knockers” (high sills in passageway openings) common to Gallery Deck structure, and 2) Successful attempts at reducing the thickness of aircraft elevator platforms. The paper concludes by pointing out some possible challenges facing the ship designer and some of the technology already created by the expected introduction of advanced design Vertical/Short Takeoff and Landing (V/STOL) aircraft.

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