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AN ADVANCED METHODOLOGY FOR PRELIMINARY HULL FORM development

NAVAL ENGINEERS JOURNAL 1984年第4期96卷 147-161页

作者： LIN, WC DAY, WG HOUGH, JJ KEANE, RG WALDEN, DA KOH, IY Wen-Chin Lin:heads the Ship Powering Division at the David Taylor Naval Ship R&D Center (DTNSRDC). Dr. Lin received his B.S. degree in mechanical engineering from the National Taiwan University in 1957. He was awarded his M.S. degree in naval architecture and Ph.D. in engineering science from the University of California at Berkeley in 1963 and 1966 respectively. From 1966 to 1969 he was employed by ESSO Research and Engineering Company to conduct marine hydrodynamic research for oil tankers and offshore structures. Since joining DTNSRDC in 1969 he has actively conducted and directed hydrodynamic research to advance naval ship design technology and improve ship performance. Active in national and international symposia on ship hydrodynamic research he is recognized for contributions to the ship research community. For the past six years he has been a member of the Performance Committee of the ITTC and currently serves as secretary of the committee. He is a member of SNAME and the Society of Naval Architects of Japan. William G. Day Jr:. has been employed as a naval architect at the David Taylor Naval Ship R&D Center since receiving a B.E.S. degree from the Johns Hopkins University in 1966. He obtained an M.S. E. degree from George Washington University in 1971. As Head Design Evaluation Branch of the Ship Performance Department he is responsible for model experiments to evaluate the hydrodynamic performance of ships and propulsors. He is a member of ASNE and SNAME. In-Young Koh:received his B.S. and M.S. degrees in electrical engineering from Lowell University in 1969 and 1971 respectively and his Ph.D. in applied mechanics from Rensselaer Polytechnic Institute in 1976. Dr. Koh joined DTNSRDC as an electronic engineer specializing in the application of advanced instrumentation and computer techniques to ship research and design. He is currently engaged in research and development of active control systems for naval ship applications. Dr. Koh is a member of ASNE SNAME and IEEE. David Andrew Walden:is

A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeeping-optimized hull form without making concessions to other performance considerations, such as resistance. The seakeeping-optimized hull is then modified to improve other performance characteristics without degrading the seakeeping. Presented is a point-design example produced by this methodology. Merits of the methodology and the point design are assessed on the basis of theoretical calculations and model experiments. This methodology is an integral part of the Hull Form Design System (HFDS) being developed for computer-supported naval ship design. The modularized character of HFDS and its application to hull form development are discussed.

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FUTURE PROPULSION MACHINERY TECHNOLOGY FOR GAS-TURBINE POWERED FRIGATES, DESTROYERS, AND CRUISERS

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NAVAL ENGINEERS JOURNAL 1984年第2期96卷 34-46页

作者： BASKERVILLE, JE QUANDT, ER DONOVAN, MR USN The Authors Commander James E. Baskerville USNis presently assigned to Naval Sea Systems Command (NA VSEA) as the Ship Design Manager for the DDG 51 the Navy's next generation surface combatant. A graduate of the U.S. Naval Academy Class of 1969 he is a qualified Surface Warfare Officer and designated Engineering Duty Officer (ED). He received his M.S. degree in Mechanical Engineering and his professional degree of Ocean Engineer from the Massachusetts Institute of Technology (MIT) and holds a patent right on an Electronic Control and Response System. His naval assignments include tours in USSRamsey (FFG-2) Aide and Flag Lieutenant to the Commander Naval Electronic Systems Command and Ship Superintendent Surface Type Desk Officer and Assistant Design Superintendent at NA VSHIPYD Pearl Harbor. He was awarded the Meritorious Service Medal for distinguished performance at Pearl Harbor Naval Shipyard. As an author he has contributed articles to the ASNEJournaland given presentations at local sections on ship design the use of innovative technology in ship repair and maintenance and the costs and risks associated with engineering progress. Commander Baskerville is a registered Professional Engineer in the State of Virginia an adjunct professor teaching marine engineering at Virginia Tech. and in addition to ASNE which he joined in 1975 is a member of SNAME Tau Beta Pi Sigma Xi ASME and the American Society of Heating Refrigeration and Air Conditioning Engineers (ASHRAE). Dr. Earl R. Quandt:received his degree of Chemical Engineer from the University of Cincinnati in 1956 and his Ph.D. degree in Chemical Engineering from the University of Pittsburgh in 1961. He worked in the naval reactors program at the Bettis Atomic Power Laboratory from 1956 to 1963. Since that time he has been with David Taylor Naval Ship Research and Development Center Annapolis Maryland where he is Head of the Power Systems Division. He contributed to this paper while on a one year assignment to the U.S. Naval Academy as V

A turning point occurred in naval engineering in 1972 when the U.S. N avy chose to use marine gas turbines for the propulsion of its new SPRUANCE and PERRY Class ships. This paper reviews the more than twenty years of experience with turbine technology and its design integration into combat ships needed to make that decision. It is concluded that the availability of a good second generation aircraft derivative engine with proven reliability and a strong commercial base, i.e., the LM-2500, was as important to the decision as was the predicted improved ship effectiveness and cost benefits. This paper discusses improvements that can be made to the twin engine, single gear, single propeller shaft system. Focusing only on this mechanical transmission concept, it addresses the impact of possible improvements to the engine, gear, and shafting. In particular, the paper discusses current LM-2500 related R&D efforts to: (a) obtain improved part-power fuel rates, (b) integrate with a reversing reduction gear, and (c) add on a waste heat recovery steam cycle. Looking ahead to the year 2000, this paper suggests that a successor to the ubiquitous LM-2500 will appear in the 15 MW power range to provide the next step in the evolution of the twin engine package. This new naval engine will most likely be based on an aircraft core that exists at present, such that it will have demonstrated its reliability and commercial potential through many hours of testing prior to its mid-1990 marine conversion. This new engine is expected to offer improved air flow, an excellent fuel rate (approaching a flat 0.30 LB/HP-HR), and effective maintenance monitoring, all at some expense in size, weight, and cost. The year 2000 engine will burn a liquid hydrocarbon fuel similar to JP-5 because of its aircraft origins. Combined with advances in gear and shafting technology, the full twin engine propulsion system of the year 2000 should be markedly lighter, smaller, and more efficient than today's units.

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A study of flame arrestors in piping systems. Even officially approved flame arrestors must be used only under the exact conditions for which they were tested and approved

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Process Safety Progress 1983年第1期2卷 5-12页

作者： G. L. Broschka I. Ginsburgh R. A. Mancini R. G. Will Amoco Oil Co. Naperville Ill. Gregory L. Broschka is currently a Specialist in Industry Supply Analysis with the Standard Oil Company (Indiana). He holds an M.S. degree in Chemical Engineering from Northwestern University and has been employed by Standard or its subsidiary companies for 8 years. While he was with the Amoco Oil Company Research Department he conducted research in flammability and flame propagation synthetic fuels and leak detection technology. Irwin Ginsburgh is a Senior Research Associate with the Amoco Oil Company Research and Development Department with whom he has been employed for 31 years. He holds a PhD in Physics from Rutgers University and has conducted extensive research in gas phase detonations and static electricity. Current research interests include unconfined vapor cloud explosions vapor recovery and advanced energy sources. He holds 42 patents has been awarded four IR 100 awards and has published numerous articles and one book. Robert A. Mancini is a Research Supervisor and Process Safety Specialist with the Amoco Oil Company Research and Development Department. He holds a PhD in Chemical Engineering from Northwestern University and has conducted research in reaction kinetics process safety environmental conservation and probability analysis related to process safety and equipment reliability. He is a member of the Static Electricity and Fire Safety Engineering Subcommittees of the American Petroleum Institute Committee on Safety and Fire Protection and is a member of the NFPA Explosion Protection Systems Technical Committee. Robert G. Will is Director of the Engineering and Environmental Research Division of Amoco Oil Company Research and Development Department and has been employed by Amoco Oil or its subsidiary companies for 29 years. He is a mechanical engineering graduate from Purdue University and has conducted research in oil spill control process safety and burner design. He holds five patents has been awarded an IR 100 award and is a Registered Profession

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PUTTING AN OIL-SPILL CLEANUP COMPUTER-MODEL TO WORK FOR THE NAVY

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NAVAL ENGINEERS JOURNAL 1983年第3期95卷 165-172页

作者： NYHART, JD PSARAFTIS, HN YAROSCHAK, PJ Mr. J. D. Nyhart:is professor of management at the Sloan School of Management and the Department of Ocean Engineering at the Massachusetts Institute of Technology. His current research and writing focus on the use of scientific and technical material in formal judicial and administrative proceedings as well as the development of economic and regulatory models appropriate for deep ocean mining and oil-spill control. Harilaos N. Psaraftis:is Assistant Professor of Marine Systems at the Department of Ocean Engineering at the Operations Research Center at M.I.T. Professor Psaraftis received two M.Sc. degrees in 1977 (in Naval Architecture and Marine Engineering and in Shipping and Shipbuilding Management) and a Ph.D. in 1979 (in Ocean Systems Operations Research) all from M.I.T. Professor Psaraftis has been conducting research in problem areas such as the probabilistic modeling of underwater detection and optimal sensor allocation (project sponsored by ONR) the optimization of oil spill cleanup operations (project sponsored by a consortium of government and industry organizations) the development of routing and scheduling algorithms in transportation problems (project sponsored by DOT) and the analysis and solution algorithms of sealift routing and scheduling problems (project sponsored by ONR and the Military Sealift Command). Professor Psaraftis has published in various journals and is currently the Chairman of the Ocean Systems Management Program at M.I.T. Mr. Paul J. Yaroschak:received his Bachelors Degree in Civil Engineering from Villanova University and his Masters Degree in Environmental Engineering from Northeastern University. He has served in the Civil Engineer Corps U.S. Navy in Public Works and Construction Management and as a Project Engineer for Navy-wide Water and Wastewater Treatment Projects for the Naval Facilities Engineering Command. He is currently Head of the Environmental Engineering Branch of the Naval Facilities Engineering Command. Mr. Yaroschak is a Registered Professional Engineer i

A research group at the Massachusetts institute of Technology has completed the first phase of the development of a computer assisted model for analyzing complex decisions and policies regarding oil spill cleanup. The model is the product of an ongoing MIT Sea Grant project, sponsored by a consortium of government and industry organizations, including the National Oceanic and Atmospheric Administration, the U.S. C oast G uard , the U.S. N avy , the Commonwealth of Massachusetts, the Spill control Association of America, JFB Scientific Corporation, the Doherty Foundation, Petro-Canada and Texaco. The model can be used, among other things, in strategic planning for the long-term oil spill response needs of a region, in assisting On Scene Coordinators in responding to a specific spill (tactical/operational setting), in evaluating the environmental and economic damages of a spill versus the cost of cleanup, in simulation and training, and in the analysis of various policy and regulatory issues such as the effects of delays, the use of dispersants and the investigation of liability and compensation issues. The paper describes the model in detail, focuses on its potential uses and presents experience with its application in conjunction with pollution control efforts of the U.S. Navy. Specifically, we outline the application of the model in the Port of Charleston, South Carolina, an ongoing project sponsored by the Naval Facilities Engineering Command. The difficulty of gathering data for such an application is discussed.

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THE SURFACE EFFECT CATAMARAN - PROGRESS IN CONCEPT ASSESSMENT

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NAVAL ENGINEERS JOURNAL 1983年第3期95卷 301-311页

作者： WILSON, FW VIARS, PR ADAMS, JD Fred W. Wilson:received his B.A. degree from the Virginia Polytechnic Institute and State University in 1967 and his M.A. degree from the University of Tennessee in 1971. Mr. Wilson has been involved with air-supported vehicle technology at the Aviation and Surface Effects Department of the David Taylor Naval Ship Research and Development Center since 1967. Until 1979 Mr. Wilson was with the Surface Effect Ship Division and participated in early SES development the SES-100A and -100B trials and in the 3000-ton SES program. Since 1979 Mr. Wilson has been in the Program Development Office participating in aircraft programs as well as the current twin-cushion surface effect ship (Surface Effect Catamaran) program. Philip R. Viars:graduated from the University of Cincinnati with a B.S. in Aerospace Engineering in 1974. He received his M.S. in Ocean and Marine Engineering from George Washington University in 1980. Since 1972 Mr. Viars has worked in the Aviation and Surface Effects Department at the David Taylor Naval Ship Research and Development Center (DTNSRDC). While at DTNSRDC Mr. Viars has participated in model and full-scale experimental programs focused on simulation. Mr. Viars is recognized as the Center expert in SES stability and performance having participated in most of the manned Navy SES testcraft evaluations. Since 1981 Mr. Viars has been in the Program Development Office where he has worked on the twin-cushion surface effect ship (SECAT) and other programs. John D. Adams:received his B.S.E. in 1972 from the University of Michigan School of Naval Architecture and Marine Engineering. He has spent seven years in Marine engineering research Marine systems design and development and dynamic tow tank testing and data analysis. Mr. Adams is currently responsible for the Maritime Dynamics Inc. field operation at the U.S. NavySES Test Facility (SESTF) Patuxent River Maryland. On-site responsibility has been the design development and manned testing of active ride control systems for the U.S. NavyXR-

The surface effect catamaran incorporates twin high length-to-beam cushions to support a low length-to-beam platform. The performance characteristics of the resulting vehicle, i.e., the resistance and head sea motions, are equivalent to a higher length-to-beam surface effect ship. The high lateral stability which results from the widely spaced hulls and cushions of the surface effect catamaran provides several advantages not inherent in conventional surface effect ship configurations. These advantages are manifested by high cross-structure height and reduced structural loads without reduction in static or dynamic roll stability. For an 800-ton ship the widely spaced cushions provide a capability of controlling off-head sea types of motions and the virtual elimination of green water over the deck up through Sea State 6. Model tests have validated cushionborne and hullborne resistance computer prediction programs. Head sea motions tests have justified the use of high cross-structure height to minimize high slam types of structural loads. Preliminary design and model tests indicate the potential for the surface effect catamaran to operate as an open ocean ship in smaller sizes than heretofore thought possible. In addition, its planform and large volume provides pay-load capabilities of much larger ships.

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AN APPROACH TO AN EVOLUTIONARY IMPLEMENTATION OF SHIPBOARD DISTRIBUTED-PROCESSING

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NAVAL ENGINEERS JOURNAL 1982年第2期94卷 39-49页

作者： FASTRING, RA WAPNER, M Richard A. Fastring:graduated from Tulane University with a B.S.E.E. and did graduate work in Systems Engineering and Operations Research at the University of Pennsylvania. He joined RCA's Surface Communications Systems Engineering Staff in 1959 where he contributed to a number of Navy and Air Force communication system programs. Since 1971 he has been with SEMCOR Inc. where he has been involved with the Navy's Shipboard Data Multiplex System (SDMS) and related data transfer programs. Mr. Fastring has served on information exchange standardization committees such as the A2K Avionics Multiplexing Committee of the Society of Automotive Engineers and Subgroup 6 (Compatibility of Naval Data Handling Equipments) of the NATO Industrial Advisory Group. Martin Wapner:graduated from the City College of New York from which he received both his Bachelor and Masters degrees in Electrical Engineering. He joined the Naval Applied Science Laboratory in 1961 where he served as Project Engineer for Ship Inertial Navigation Systems (SINS) and related equipments. Since 1967 he has been employed by the Naval Sea Systems Command initially as Navigation and Interior Communications Programs Manager in the Research Directorate and currently as Director Combat Systems Engineering Research and Technology Office in the Combat Systems Directorate. He has been responsible for the development of the Shipboard Data Multiplex System (SDMS) the Electrically Suspended Gyro Navigator (ESGN) and the Doppler Sonar Velocity Log (DSVL) and directs other technology programs in the area of Command and Control and related command support functions. He has directed programs to evaluate foreign data bus and distributed processor technology for potential application to U.S. requirements and is active in a number of U.S. government and foreign government information exchange programs. He has authored numerous technical papers and is a Senior Member of the Institute of Electrical and Electronic Engineers.

Traditional thinking regarding the data transfer vehicle needed to interconnect elements of a distributed processing combat system generally envisions one or more data busses. This paper presents the somewhat unorthodox viewpoint that a distributed switching network is a better transition vehicle for moving from today's federated architectures to the distributed-processing architectures of the future. The structure and operation of a distributed switching network concept, called Standard Information Transfer Architecture for Combat systems (SITACS), is briefly described. Simulation results are presented which show throughput and timing values considerably better than that achievable by data bus systems.

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IS AUTOMATION THE MAGIC POTION FOR MANNING PROBLEMS

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NAVAL ENGINEERS JOURNAL 1982年第2期94卷 127-136页

作者： MELLIS, JG PLATO, AI REIN, RJ James G. Mellis:attended Central Institute in Kansas City Mo. where he graduated in Electronic Engineering Technology. He later attended the University of Minn. in Minneapolis. At present he works in the Manning and Controls Integration Section of the Naval Sea Systems Command. Mr. Mellis is responsible for developing manpower requirements for ship design and for the coordination of shipboard automation designs with the U.S. Navy's manpower policies and availability. Mr. Mellis is currently developing manpower requirements for the U.S. Navy's DDGX ship design. In this capacity he has examined proposals for shipboard manpower reductions through the use of automation and remote control techniques. Another project where Mr. Mellis is heavily engaged in is the Ship Systems Engineering Standards (SSES) development. Mr. Mellis is the assistant project manager for the test and evaluation and producibility aspects of the SSES project. Previously prior to his employment with NAVSEA Mr. Mellis worked for General Dynamics/Electronic Division as a Senior Field Engineer on the Apollo Instrumentation Ships (i.e. Vanguard Restone Mercury). He was responsible for Central Data Processing Systems on the three ships. Artis I. Plato:is the Head of the Manning and Controls Integration Section of the Naval Sea Systems Command (NAVSEA). He is responsible for the development of accurate manpower requirements for all new construction and major overhaul ship projects for the U.S. NAVY. In addition Mr. Plato must coordinate shipboard controls integration and automation aspects with manpower requirements to insure that a compatible solution is developed. Mr. Plato began his professional career in 1956 at the New York Naval Shipyard. There he worked in the Internal Combustion Engine and Shipboard Elevator Section. During 1957 and 1958 he was called up for active duty with the U.S. Army Corps of Engineers. He served in Europe with various Construction Engineers units. After release from active duty he returned to the shipyard. In 19

This paper examines the recent experience in the UNITED STATES NAVY where automation has been introduced into new ship designs. While other attributes are recognized in the introduction of automated shipboard systems, such as the ability to respond more quickly in combat situations, this paper focuses on the effects of automation upon ship manpower requirements. Specific examples show that expected reductions in manning were not achieved in recent ship designs where automation was incorporated for that purpose. While the use of shipboard automation is not without its critics, the U.S. Fleet appears to have accepted the concept. User feedback addresses the issues of reliability, the provisions for backup systems, the need for better qualified personnel and the concern about maintenance workload. The authors provide specific recommendations for improved guidance to ship designers to more effectively apply automation in the ship design process.

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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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SHIPBOARD DATA MULTIPLEX SYSTEM - NEW CONCEPT FOR WARSHIP ELECTRONIC SYSTEM INTEGRATION

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NAVAL ENGINEERS JOURNAL 1979年第4期91卷 51-61页

作者： WAPNER, M THE AUTHOR graduated from the City College of the City University of New York from which he received both his Bachelor and Masters degrees in Electrical Engineering. He joined the Naval Applied Science Laboratory in 1961 where he served as Project Engineer for Ships Inertial Navigation Systems (SINS) and related equipments. Since 1967 he has been employed by the Naval Sea Systems Command (formerly NAVSHIPS) Research and Technology Directorate. initially as Navigation and Interior Communications Program Manager and currently as Director Combat Support Systems R&D Office. In addition to being the Program Manager for the Shipboard Data Multiplex System. his responsibilities include supervising research and development in areas of surveillance. fire control command and control and related command support functions. He is active in a number of U.S. Navy and foreign government information exchange programs has authored several technical papers and is a member of the Institute of Navigation and the Institute of Electrical and Electronic Engineers.

The Shipboard Data Multiplex System (SDMS) is a general purpose information transfer system directed toward fulfilling the internal data Intercommunication requirements of a variety of naval combatant ships and submarines in the 1980–1990 time frame. The need for a modern data transfer system of the size and capability of SDMS has been increase in unison with the sophistication of shipboard electronic equipment and the associated magnitude of equipment-to-equipment signal traffic. Instead of the miles of unique cabling that must be specifically designed for each ship, SDMS will meet information transfer needs with general-purpose multiplex cable that will be Installed according to a standard plan that does not vary with changes to the ship's electronics suite. Perhaps the greatest impact of SDMS will be the decoupling of ship subsystems from each other and from the ship. Standard multiplex interfaces will avoid the cost and delay of modifying subsystems to make them compatible. The ability to wire a new ship according to a standard multiplex cable plan, long before the ship subsystems are fully defined, frees both the ship and the subsystems to develop at their own pace, will allow compression of the development schedules and will provide ships with more advanced subsystems. This paper describes the SDMS system currently being developed by the U.S. Navy.

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HUB SIZE SELECTION CRITERIA FOR controlLABLE PITCH PROPELLERS AS A MEANS TO ENSURE systems INTEGRITY

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NAVAL ENGINEERS JOURNAL 1978年第6期90卷 49-61页

作者： WIND, J The Authoris a citizen of the Netherlands. He studied Aircraft Engineering and Mechanical Engineering at the Delft Institute of Technology from which he received his MS degree in 1955. He began his career as a Research Engineer in the field of Nuclear Engineering employed by VMF—Stork and he holds several U.S. Patents relating to ultra—centrifuges for the separation of Uranium. He was next engaged. in design of control gear for radio astronomy aerials and operating gear for bridges and huge floodgates in the Scheldt and Rhine Delta. Later he became involved in the control of diesel engines and controllable pitch propellers and in 1967 joined LIPS Propeller Works where he developed CP propeller mechanisms solved the problem of high—pressure oil supply to large diameter marine shafts and made an improvement for high—speed propeller nozzles. As Head of the Design Department he was responsible for the design of large controllable pitch propellers for fast Container Ships and Naval Ships with gas turbine drive. Mr. Wind has authored several technical publications among which are “Controllable Pitch Propellers. Their Principles and Mechanisms” and “The Development of CP Propeller Systems.” At the present time he is a Corporate Engineering Consultant to the Propeller Division of LIPS B. V.

In a CP propeller the size of the hub largely influences the reliability of the system in operation. Accurate choice of the hub—size provides the best means to prevent the system from structural propeller failures and is therefore the best method to ensure reliability and optimized performance. Recent failures of high—power CP propellers, of which one Navy propeller had a serious mission failure, could have been avoided if a larger hub had been adopted. The paper contains two tools, available also to nonspecialists. One allows clear recognition of the technical degree of difficulty of all types of propellers and the other is a scale to determine the degree of load of each CP propeller hub. Information is given concerning the influence of the hub/diameter ratio on the hydrodynamic performance.

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