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NUCLEAR VS NONNUCLEAR ATTACK SUBmarine POWERPLANTS

naval ENGINEERS JOURNAL 1993年第3期105卷 224-231页

作者： RAINS, DA MITCHELL, KA Dr. Dean A. Rains:is president of Decision Engineering Pascagoula Miss. He has been an active member of ASNE since 1970 a frequent contributor to the Naval Engineers Journal and a participant at ASNE Day as an author and a discusser. He was either chairman or paper chairman for several Cruiser Destroyer and Frigate Technology Symposiums held in Biloxi Miss. He is past chairman of the Pascagoula Section of ASNE. He is currently the program chairman for the Pascagoula Section. He has forty-two years engineering experience and is a graduate of the California Institute of Technology from which he received his B.S. M.S. and Ph.D. all in mechanical engineering. Kenneth A. Mitchell Jr.:is an engineer with U.S. Marine New Orleans La. He was formerly an engineer at Decision Engineering Pascagoula Miss. and has three years of engineering experience. He is an active member of ASNE. Mr. Mitchell received his B.S. in naval architecture and marine engineering from the University of New Orleans.

The budget cuts of the 1990s have placed the Navy in a difficult position when trying to maintain neet levels capable of meeting a more dispersed and less defined threat. The cancellation of Seawolf initiated a large effort to define a suhmarine that is capable and affordable with today's shrinking budget. Manv European countries have turned to air independent (AIP), non-nuclear propulsion systems as a way of increasing the effectiveness of their fleets when compared to their current diesel/electric bouts. Bv evaluating and comparing two AIP and one hybrid propulsion systems to current nuclear capabilities, we can help define options for the next generation submarine. This paper attempts to provide design and cost information which can be used in conjunction with mission profiles to determine the best system for the desired job. Tomorrow's submarine will perform a variety of missions. Most all can be handled well bv nuclear submarines, but at what cost? These performance/cost tradeoffs are the subject of this paper.

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Heat transport bounds for a truncated model of Rayleigh–Bénard convection via polynomial optimization

arXiv

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arXiv 2020年

作者： Olsona, Matthew L. Goluskin, David Schultz, William W. Doering, Charles R. Department of Mathematics University of Michigan Ann ArborMI48109 United States Department of Mathematics & Statistics University of Victoria VictoriaBCV8P 5C2 Canada Department of Mechanical Engineering University of Michigan Ann ArborMI48109 United States Department of Naval Architecture & Marine Engineering University of Michigan Ann ArborMI48109 United States Center for the Study of Complex Systems University of Michigan Ann ArborMI48109 United States Department of Physics University of Michigan Ann ArborMI48109 United States

Upper bounds on time-averaged heat transport are obtained for an eight-mode Galerkin truncation of Rayleigh’s 1916 model of natural thermal convection. Bounds for the ODE model—an extension of Lorenz’s three-ODE system—are derived by constructing auxiliary functions that satisfy sufficient conditions wherein certain polynomial expressions must be nonnegative. Such conditions are enforced by requiring the polynomial expressions to admit sum-of-squares representations, allowing the resulting bounds to be minimized using semidefinite programming. Sharp or nearly sharp bounds on mean heat transport are computed numerically for numerous values of the model parameters: the Rayleigh and Prandtl numbers and the domain aspect ratio. In all cases where the Rayleigh number is small enough for the ODE model to be quantitatively close to the PDE model, mean heat transport is maximized by steady states. In some cases at larger Rayleigh number, time-periodic states maximize heat transport in the truncated model. Analytical parameter-dependent bounds are derived using quadratic auxiliary functions, and they are sharp for sufficiently small Rayleigh numbers. Copyright © 2020, The Authors. All rights reserved.

关键词： Dynamical systems

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USING VIRTUAL ENVIRONMENTS IN THE DESIGN OF SHIPS

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naval ENGINEERS JOURNAL 1994年第3期106卷 91-106页

作者： JONS, OP RYAN, JC JONES, GW Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hanover W. Germany and an MS in naval architecture and marine engineering from MIT. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship system integration as manager LHA ship systems engineering department. From 1972 to 1974 he was the principal research scientist at Hydronautics. In 1974 as technical director he helped establish the Crystal City office of Designers and Planners. Mr. Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he serves as corporate vice president engineering. J. Christopher Ryan:earned his bachelors and masters degrees in naval architecture from Webb Institute and MIT respectively. He spent three years at the advanced marine technology division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. He subsequently went to the Navy Department concentrating on early stage design of surface combatants for twelve years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the Technical Director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the director of the future ship concepts division. Gary W. Jones:graduated from the University of Tennessee in 1971 with a BS in mechanical engineering and followed up with graduate work at George Washington University and the University of Maryland. Mr. Jones was with the Naval Sea Systems Command from 1971 until 1988 where he was a naval architect in the submarine section of the hull form design division. In 1988 he was detailed to the Defense Advanced Research Projects Agency (DARPA) where he became the program manager for the advanced submarine technology program's hydrodynamic hydroac

A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements. Recent and dramatic advances in computer simulation technologies hold forth the promise of revolutionizing design and acquisition strategies by providing the means to validate end users' requirements prior to hardware construction. By designing and operationally testing virtual prototypes in a virtual environment, these technologies will soon offer naval architects the ability to build and launch ships in computer-based cyberspace in lieu of the shipbuilder's ways. The authors of this paper provide the background for these developments, explore the significance and ramifications of these technologies to the current process of ship and system design, outline challenges lying ahead, and present their vision and recommendations for future development.

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Numerical study of Fillet Surface Effect on the Ducted Performance Using OpenFOAM

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Journal of Physics: Conference Series 2019年第1期1215卷

作者： Aldias Bahatmaka Dong Joon kim Hadi Pranggono Interdisciplinary program of Marine Convergence Design Pukyong National University 48513 Busan South Korea Naval Architecture and Marine Systems Engineering Department Pukyong National University 48513 Busan South Korea Aquaculture Department Pekalongan University 51115 Pekalongan Indonesia

In the present study, the effect of fillet surface on the performance of the ducted propeller using Reynolds-Average Navier Stokes (RANS) method is applied. The numerical simulations compare the propeller model with fillet on the surface and without fillet. OpenFOAM is used to simulate the performances and solve the problems in the open water propeller simulation. MRF approach is applied for this simulation. Kaplan model with the 19A nozzle is investigated by comparing the results with experimental data. The effect of fillet surface on the ducted propeller are presented and discussed in this study.

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THE EFFECT OF ELECTRONICS ON THE DESIGN OF DEEP SUBMERSIBLES

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naval Engineers Journal 1969年第3期81.0卷 123-132页

作者： NICHOLSON, WILLIAM M. CESTONE, JOSEPH A. Captain W. M. Nicholson USN is presently Director of Deep Submergence Systems Project having graduated first in the class of 1941 from the U.S. Naval Academy and received a Master of Science in Naval Architecture and Marine Engineering. Prior duty has included Design Assistant at the Bureau of Ships Planning and Estimating Assistant at the Mare Island Naval Shipyard Engineering Department on the USS OREGON CITY Damage Control Assistant on the USS PHILIPPINE SEA Ship Superintendent and Docking Office after which he was Design Superintendent at the Boston Naval Shipyard Engineering Instructor at the Naval Postgraduate School Management Engineer and Comptroller at the Puget Sound Naval Shipyard Professor of Naval Construction at the Massachusetts Institute of Technology. He has been awarded the American Defense Service Medal the American Campaign Medal World War II Victory Medal Navy Occupation Service Medal European Clasp the National Defense Service Medal. Member of the American Society of Naval Engineers American Society of Naval Architects and Marine Engineers the Instituteo Panamerico de Engenieria Naval Tau Beta Pi and Sigma Xi. Mr. Joseph A. Cestone has been associated with the Deep Submergence Systems Project since its inception and received an appointment as Head of the Sensors-Navigation Ship Control Branch in 1966. In this capacity he is responsible for design specifications and procurement of sensor devices navigation systems and control equipment for the undersea submersibles and habitats pertaining to the Deep Submergence Program.

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STRUCTURAL ANALYSIS AND DESIGN OF A CATAMARAN CROSS‐STRUCTURE BY THE FINITE ELEMENT METHOD

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naval Engineers Journal 1973年第1期85卷 33-42页

作者： MANSOUR, DR.A. FENTON, LCDR. PAUL H. Dr. A. Mansour an Associate Professor in the Department of Ocean Engineering at Massachusetts Institute of Technology received his Bachelor of Science degree in Mechanical Engineering from the University of Cairo in 1958 and his M.E. and Ph.D. degrees in Naval Architecture and Marine Engineering from the University of California at Berkeley in 1962 and 1966 respectively. He has had field experience and design responsibilities for about six years in the Suez Canal Authority John J. McMullen Associates Inc. and M. Rosenblatt and Son Inc. and has been with the Massachusetts Institute of Technology for the past four years. During this period he contributed several technical papers and reports in the areas of structural mechanics sea loads finite element analysis of marine structures and probabilistic structural mechanics. He has been a consultant for several companies and organizations is a member of Sigma Xi and SNAME currently serving as a member of the latter's Stress Analysis and Strength of Structural Elements Panel. USN Lieutenant Commander Paul H. Fenton USN a 1964 graduate of the U.S. Naval Academy recently completed a graduate education program at M.I.T. in the field of Naval Construction and Engineering earning two degrees: Ocean Engineer and Master of Science in Naval Architecture and Marine Engineering. He is presently assigned to the Charleston Naval Shipyard Charleston South Carolina and has had previous duty in the U.S.S. STICKELL (DD 888) and with the Naval Support Activity Saigon.

One of the problems encountered during the design of the ASR‐21 Catamaran is the determination of the effectiveness of the cross‐structure deck plating. In this paper, this problem is examined using the Finite Element Method. The behavior of a multicell box girder representing a catamaran cross‐structure is studied. Because of the relatively low length‐to‐breadth ratio of a typical catamaran cross‐structure, the deck plating effectiveness is found to be rather small. Parametric studies are performed, and curves of the effectiveness as a function of the relevant geometric and loading parameters are presented. These curves may be helpful in the early stages of new designs. © 1973 by the American Society of naval Engineers

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THE DEVELOPMENT OF MANNED, DEEP‐DIVING SUBMERSIBLES

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naval Engineers Journal 1969年第5期81卷 35-42页

作者： RAMSAY, RAYMOND THE AUTHOR: completed a British apprenticeship with Furness Shipbuilding Company and studied for the Higher National Certificate (Naval Architecture) in 1952. He emigrated to Canada in 1956 after serving with the Royal Army Educational Corps in England and Singapore. Before appointment as a Senior Naval Architect in the Ship Concept Design Division of the U.S. Naval Ship Engineering Center he performed naval architectural duties for the Davie Shipbuilding Company (Quebec Canada) also the Great Lakes Engineering Works and General Dynamics /Electric Boat Division in the United States. During the period January to November 1968 he participated in the NAVSEC element of the Deep Ocean Technology Program associated with the development of submersible vehicles and was a member of the DSSV technical evaluation team. Recently he transferred to NAVSHIPS Code 425 with promotion to Program Manager PERA(SS)—Planning and Engineering for Repairs and Alterations (Submarines). Mr. Ramsay is an Associate Member of the North East Coast Institution of Engineers and Shipbuilders (England) a Full Member of The Society of Naval Architects and Marine Engineers Civil Member of The American Society of Naval Engineers and Full Member of The Association of Senior Engineers.

The need for maintaining technological leadership in the deep submergence field is given recognition, with particular reference to manned submersibles. A design sequence is outlined to illustrate how operating crew requirements must be satisfied very early in the design process to insure maximum overallmission effectiveness. The necessity for more technologists and “totally immersed” projects to manage future vehicle technology efforts is also addressed. © 1969 by the American Society of naval Engineers, Inc.

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The Hull‐Propeller Relationship of the Oceanographic Research Ship T‐Agor

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naval Engineers Journal 1966年第5期78卷 851-860页

作者： SARCHIN, T.H. The Author is head of the Technical Support Section Ship Concept Design Division of Naval Ship Engineering Center. His group is responsible for conducting special studies relative to design problems and participating in the Ship Systems Command's RDT&E program in the area of ship hydrodynamics. His educational background includes a BS in Aeronautical Engineering from the University of Washington and graduate study at Catholic University and the University of Maryland. He has over 28 years of continuous experience in the Bureau of Ships and is a member of the Society of Naval Architects and Marine Engineers before whom he recently presented a paper on “The Stability of Naval Ships.” He is also a charter member of the ASE and is a registered Professional Engineer in the District of Columbia.

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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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COMPUTER AIDS FOR SHIP DESIGN, INTEGRATION AND CONTROL

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naval ENGINEERS JOURNAL 1980年第2期92卷 73-87页

作者： CARLSON, CM JOHNSON, RA HELMING, FW Mr. Craig M. Carlson received his B.S. degree in Naval Architecture and Marine Engineering from the University of Michigan in 1970 and began his career with the Department of the Navy at the Naval Ship Engineering Center (NAVSEC). In 1972. he returned to the University of Michigan under the NAVSEC Long Term Training Program and received his M.S. degree in Naval Architecture and Marine Engineering. After returning to the Ship Arrangements Branch at NAVSEC. he was assigned as Task Leader for General Arrangements for the PGG PCG PHM. and MCM ship designs and was awarded Outstanding Performance Awards in 1974 and 1975. In addition he was Manager of the Arrangement Subsystem of the Navy's Computer-Aided Ship Design and Construction Program (CASDAC). In October 1979. he became Manager of the CASDAC Hull Design System. Currently. he also is enrolled in the M.S. of Computer Science Program at Johns Hopkins University. Mr. Carlson previously has presented technical papers at ASNE Day 1974 and 1978 as well as at the 1979 DOD Manufacturing Technology Advisory Group Conference. Besides ASNE. which he joined in 1972. he is a member of SNAME. ASE. and the U.S. Naval Institute. Mr. Robert A. Johnson is a Naval Architect in Surface Combatants Design (SEA 03D3). Ship Design Integration Directorate Naval Sea Systems Command. He received an Associate in Engineering degree in Drafting and Design Technology in 1959. his B.S. degree in Aerospace Engineering in 1965. and his M.S. degree in Engineering Mechanics in 1970. all from the Pennsylvania State University. In 1973. he was selected for the NA VSEC Hull Division s Long Term Training Program at the University of Michigan subsequently receiving his M.S.E. degree in Naval Architecture in 1974. Mr. Johnson began his career with the Ordnance Research Laboratory at Pennsylvania State University in 1959 where he worked. on the design of hydroelastic submarine models and conducted research in the area of flow induced structural vibrations. In 1967 he joined HRB-Singer at State Colle

This paper presents an integrated approach to Computer-Aided Ship Design for U.S. Navy preliminary and contract design. An integrated Hull Design System (HDS), currently under development by the Hull Group of the naval Sea Systems Command (NAVSEA 32). is the vehicle for the discussion. This paper is directed toward practicing ship design professionals and the managers of the ship design process. Primary emphasis of this paper, and of the development effort currently under way, is on aiding ship design professionals in their work. Focus is on integration and management control of the extremely complex set of processes which make up naval ship design. The terminology of the Ship Designer and Design Manager is used. The reader needs no familiarity with the technologies of computer science.

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