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Canadian Journal of Anaesthesia 1992年第7期39卷 749-749页

作者： Michèle, Saiah Alain, Borgeat Oliver, Wilder-Smith Hung, Orlando R. Hope, Charles E. Laney, Geoffrey Whynot, Sara C. Coonan, Thomas J. Malloy, David S. Patterson, S. Gelb, A. Manninen, P. Strum, D. Glosten, B. Spellman, M. J. Eger, E. I. Craen, R. A. Gelb, A. W. Murkin, J. M. Chong, K. Y. Penning, D. H. El-Behairy, H. Brien, J. F. Coh, J. W. Arellano, R. Correa, J. Fedorko, L. Liu, Z. Boylan, J. F. Sandler, A. N. Nierenberg, H. Sheiner, P. A. Greig, P. D. O’Leary, G. M. Teasdale, S. J. Glynn, M. F. X. Orser, B. A. Wang, L. -Y. MacDonald, J. F. Loomis, C. W. Arunachalam, K. D. Vyas, D. Milne, B. Gagnon, Daniel Lavoie, Josée Dupuis, Jean-Yves Miller, D. R. Martineau, R. J. Greenway, D. Olivaris, L. Hull, K. Tierney, R. N. M. Wynands, J. E. Martineau, R. St-Jean, B. Kitts, J. Miller, D. Lindsay, P. Curran, M. Allen, G. C. Crossan, M. L. Wise, Richard Donati, François Bevan, David R. Hardy, J. F. Desroches, J. Perrault, J. Carrier, M. Robitaille, D. Ansley, D. M. O’Connor, J. P. Dolman, J. Townsend, G. E. Ricci, D. Liepert, D. J. Browne, P. M. Hertz, T. Rooney, M. Yip, R. W. Code, W. Phillips, A. A. McLean, R. F. Devitt, J. H. Harrington, E. M. Byrick, R. J. Wong, P. Y. Wigglesworth, D. Kay, J. C. Sinclair, L. A. Koch, J. P. Deemar, K. A. Christakis, G. K. Belo, S. Angle, P. Cheng, D. Boylan, J. Sandler, A. Feindel, C. Carmichael, F. Boylen, P. DeLima, L. G. R. Nathan, H. J. Hynes, M. S. Bourke, M. E. Russell, G. N. Seyone, C. Chung, F. Chartrand, Daniel Roux, Lucie Dain, S. L. Smith, B. D. Webster, A. C. Wigglesworth, D. F. Rose, D. K. Caskennette, G. Mechetuk, C. Doyle, D. John DeMajo, Wilfred van den Bosch, Frank Lee, Mark McClenaghan, K. M. Mazer, C. D. Preston, R. Crosby, E. T. Kotarba, D. Dudas, H. Elliott, R. D. Enns, J. Manninen, P. H. Farrar, J. K. Huzyka, David L. Lin, L. Philip Fossey, Susan Finucane, Brendan T. Stockwell, M. Lozanoff, S. Lang, S. Hyssen, J. Campbell, D. C. Douglas, M. J. Pavy, T. J. G. Flanagan, M. L. McMorland, G. H. Bands, Colin Ffaracs, Ch. B. Lipsett, Catherine Drover, David Stafford- Department of Anesthesiology University Hospital of Geneva Genève 4 Switzerland Departments of Anaesthesia and Neurosurgery Dalhousie University and Victoria General Hospital Halifax Departments of Anaesthesia and Medicine Dalhousie University Halifax Department of Anaesthesia Victoria General Hospital Dalhousie University Halifax Department of Anaesthesia Dalhousie University and Victoria General Hospital Halifax Department of Anaesthesia University Hospital London Departments of Anesthesia at U of Pittsburgh UC San Francisco U of Chicago USA Departments of Physiology and Anaesthesia The University of Western Ontario and The John. P. Roberts Research Institute London Department of Anaesthesia and Program in Critical Care University Hospital London Department of Anaesthesia/Critical Care University Hospital University of Western Ontario London Department of Anaesthesia Queen’s University Kingston Canada Department of Pharmacology & Toxicology Queen’s University Kingston Canada Department of Anaesthesia University of Toronto Toronto Departments of Anaesthesia Surgery and Haematology The Toronto Hospital Toronto The Acute Pain Research Unit Department of Anaesthesia and The Department of Psychology The Toronto Hospital (General Division) Toronto Departments of Anaesthesia and Psychology Toronto General Division The Toronto Hospital University of Toronto Toronto Departments of Anaesthesia and Behavioral Science University of Toronto Toronto The Toronto Hospital General Division University of Toronto Toronto Dept. Anaesthesia Sunnybrook Health Science Center Canada Dept. Physiology University of Toronto Toronto School of Pharmacy Memorial University of Newfoundland St. John’s Department of Anaesthesia Faculty of Medicine The University of British Columbia & Grace Hospital Vancouver Centre Hospitalier Universitaire de Sherbrooke N. Fleurimont Department of Anesthesia University of Ottawa Heart Institute Ottawa Civic Hospital Ottawa Department of Anaesthesia

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Abstracts

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Canadian Journal of Anaesthesia 1992年第1期39卷 A3-A151页

作者： Saiah Michèle Borgeat Alain Wilder-Smith Oliver Orlando R. Hung Charles E. Hope Geoffrey Laney Sara C. Whynot Thomas J. Coonan David S. Malloy S. Patterson A. Gelb P. Manninen D. Strum B. Glosten M. J. Spellman E. I. Eger R. A. Craen A. W. Gelb J. M. Murkin K. Y. Chong D. H. Penning H. El-Behairy J. F. Brien J. W. Coh R. Arellano J. Correa L. Fedorko Z. Liu J. F. Boylan A. N. Sandler H. Nierenberg P. A. Sheiner P. D. Greig G. M. O’Leary S. J. Teasdale M. F. X. Glynn B. A. Orser L. -Y. Wang J. F. MacDonald C. W. Loomis K. D. Arunachalam D. Vyas B. Milne Daniel Gagnon Josée Lavoie Jean-Yves Dupuis D. R. Miller R. J. Martineau D. Greenway L. Olivaris K. Hull R. N. M. Tierney J. E. Wynands R. Martineau B. St-Jean J. Kitts D. Miller P. Lindsay M. Curran G. C. Allen M. L. Crossan Richard Wise François Donati David R. Bevan J. F. Hardy J. Desroches J. Perrault M. Carrier D. Robitaille D. M. Ansley J. P. O’Connor J. Dolman G. E. Townsend D. Ricci D. J. Liepert P. M. Browne T. Hertz M. Rooney R. W. Yip W. Code A. A. Phillips R. F. McLean J. H. Devitt E. M. Harrington R. J. Byrick P. Y. Wong D. Wigglesworth J. C. Kay L. A. Sinclair J. P. Koch K. A. Deemar G. K. Christakis S. Belo P. Angle D. Cheng J. Boylan A. Sandler C. Feindel F. Carmichael P. Boylen L. G. R. DeLima H. J. Nathan M. S. Hynes M. E. Bourke G. N. Russell C. Seyone F. Chung Daniel Chartrand Lucie Roux S. L. Dain B. D. Smith A. C. Webster D. F. Wigglesworth D. K. Rose G. Caskennette C. Mechetuk D. John Doyle Wilfred DeMajo Frank van den Bosch Mark Lee K. M. McClenaghan C. D. Mazer R. Preston E. T. Crosby D. Kotarba H. Dudas R. D. Elliott J. Enns P. H. Manninen J. K. Farrar David L. Huzyka L. Philip Lin Susan Fossey Brendan T. Finucane M. Stockwell S. Lozanoff S. Lang J. Hyssen D. C. Campbell M. J. Douglas T. J. G. Pavy M. L. Flanagan G. H. McMorland Colin Bands Ch. B. Ffaracs Catherine Lipsett David Drover Mark Stafford-Smith Sarah Stevens Kate Shields Michael J. MacSween J. D. McAllister P. K. Morley-Forster A. K. White M. D. Taylor H. M. Vandenberghe D. Knop Department of Anesthesiology University Hospital of Geneva Genève 4 Switzerland Departments of Anaesthesia and Neurosurgery Dalhousie University and Victoria General Hospital Halifax Departments of Anaesthesia and Medicine Dalhousie University Halifax Department of Anaesthesia Victoria General Hospital Dalhousie University Halifax Department of Anaesthesia Dalhousie University and Victoria General Hospital Halifax Department of Anaesthesia University Hospital London Departments of Anesthesia at U of Pittsburgh UC San Francisco U of Chicago USA Departments of Physiology and Anaesthesia The University of Western Ontario and The John. P. Roberts Research Institute London Department of Anaesthesia and Program in Critical Care University Hospital London Department of Anaesthesia/Critical Care University Hospital University of Western Ontario London Department of Anaesthesia Queen’s University Kingston Canada Department of Pharmacology & Toxicology Queen’s University Kingston Canada Department of Anaesthesia University of Toronto Toronto Departments of Anaesthesia Surgery and Haematology The Toronto Hospital Toronto The Acute Pain Research Unit Department of Anaesthesia and The Department of Psychology The Toronto Hospital (General Division) Toronto Departments of Anaesthesia and Psychology Toronto General Division The Toronto Hospital University of Toronto Toronto Departments of Anaesthesia and Behavioral Science University of Toronto Toronto The Toronto Hospital General Division University of Toronto Toronto Dept. Anaesthesia Sunnybrook Health Science Center Canada Dept. Physiology University of Toronto Toronto School of Pharmacy Memorial University of Newfoundland St. John’s Department of Anaesthesia Faculty of Medicine The University of British Columbia & Grace Hospital Vancouver Centre Hospitalier Universitaire de Sherbrooke N. Fleurimont Department of Anesthesia University of Ottawa Heart Institute Ottawa Civic Hospital Ottawa Department of Anaesthesia

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FIELD SAMPLING OF RESIDUAL AVIATION GASOLINE IN SANDY SOIL

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GROUND WATER MONITORING AND REMEDIATION 1991年第2期11卷 107-120页

作者： OSTENDORF, DW LEACH, LE HINLEIN, ES XIE, YF 1 David W. Ostendorf is an associate professor in the Environmental Engineering Program of the Civil Engineering Department at the University of Massachusetts (Civil Engineering Department University of Massachusetts Amherst MA 01003). His research interests include unconfined aquifer contamination hazardous waste site remediation and analytical modeling of problems in environmental fluid mechanics. Dr. Ostendorf is a registered professional engineer in Massachusetts and a member of the American Geophysical Union American Society of Civil Engineers Soil Science Society of America Water Pollution Control Federation and Association of Environmental Engineering Professors as well as the National Water Well Association.2 Lowell E. Leach is an environmental engineer with the Robert S. Kerr Environmental Research Laboratory of the U.S. Environmental Protection Agency (RS Kerr Environmental Research Laboratory U.S. EPA P.O. Box 1198 Ada OK74820). Leach received his B.S. ingeological engineering at the University of Oklahoma in 1959 and has been a registered professional engineer in Oklahoma since 1966. With 29 years of experience in field applications of geological engineering he is responsible for developing methodology for sampling ground water and subsurface materials for the Robert S. Kerr Environmental Research Laboratory.3 Erich S. Hinlein is a research assistant in the Environmental Engineering Program of the Civil Engineering Department at the University of Massachusetts (Civil Engineering Department University of Massachusetts Amherst MA 01003). His research interests include ground water pollution hazardous waste site investigation and transport processes in unconfined aquifers. Hinlein graduated with a B.S. in electrical and computer engineering from the University of Massachusetts at Amherst in May 1985 and entered the Environmental Engineering Master's Degree Program in January 1989.4 Yuefeng Xie is a postdoctoral research associate in the Environmental Engineering Program of the Civil E

Two complementary field sampling methods for the determination of residual aviation gasoline content in the contaminated capillary fringe of a fine, uniform, sandy soil were investigated. The first method featured field extrusion of core barrels into pint-size Mason jars, while the second consisted of laboratory partitioning of intact stainless steel core sleeves. The barrel extrusion procedure involved jar headspace sampling in a nitrogen-filled glove box, which delineated the 0.7m thick residually contaminated interval for subsequent core sleeve withdrawal from adjacent boreholes. Soil samples removed from the Mason jars (in the field) and sleeve segments (in the laboratory) were subjected to methylene chloride extraction and gas chromatographic analysis to compare their aviation gasoline content. The barrel extrusion sampling method yielded a vertical profile with 0.10m resolution over an essentially continuous 5.0m interval from the ground surface to the water table. The sleeve segment alternative yielded a more resolved 0.03m vertical profile over a shorter 0.8m interval through the capillary fringe. The two methods delivered precise estimates of the vertically integrated mass of aviation gasoline at a given horizontal location, and a consistent view of the vertical profile as well. In the latter regard, a 0.2m thick lens of maximum contamination was found in the center of the capillary fringe, where moisture filled all voids smaller than the mean pore size. The maximum peak was resolved by the core sleeve data, but was partially obscured by the barrel extrusion observations, so that replicate barrels or a half-pint Mason jar size should be considered for data supporting vertical transport analyses in the absence of sleeve partitions.

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MAGNETOHYDRODYNAMIC SUBMARINE PROPULSION SYSTEMS

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 141-157页

作者： SWALLOM, DW SADOVNIK, I GIBBS, JS GUROL, H NGUYEN, LV VANDENBERGH, HH Daniel W. Swallomis the director of military power systems at Avco Research Laboratory Inc. a subsidiary of Textron Inc. in Everett Mass. Dr. Swallom received his B.S. M.S. and Ph.D. degrees in mechanical engineering from the University of Iowa Iowa City Iowa in 1969 1970 and 1972 respectively. He has authored numerous papers in the areas of power propulsion and plasma physics and currently is a member of the Aerospace Power Systems Technical Committee of the AIAA. Dr. Swallom has directed various programs for the development of advanced power generation systems lightweight power conditioning systems and advanced propulsion systems for marine applications. His previous experience includes work with Odin International Corporation Maxwell Laboratories Inc. Argonne National Laboratory and the Air Force Aero Propulsion Laboratory. Currently Dr. Swallom is directing the technical efforts to apply magnetohydrodynamic principles to a variety of propulsion and power applications for various marine vehicles and power system requirements respectively. Isaac Sadovnikis a principal research engineer in the Energy Technology Office at Avco Research Laboratory Inc. a subsidiary of Textron Inc. He received his B.S. in engineering (1974) B.S. in physics (1975) M.S. in aeronautics and astronautics (1976) and Ph.D. in physics of fluids (1981) at the Massachusetts Institute of Technology. Dr. Sadovnik has been involved in research work funded by DARPA concerning the use of magnetohydrodynamics for underwater propulsion. He has built theoretical models that predict the hydrodynamic behavior of seawater flow through magnetohydrodynamic ducts and their interaction with the rest of the vehicle (thrust and drag produced). In addition Dr. Sadovnik has been involved in research investigations geared toward the NASP program concerning the use of magnetohydrodynamic combustion-driven accelerator channels. Prior to joining Avco Dr. Sadovnik was a research assistant at MIT where he conducted experimental and

Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, increased maneuverability, enhanced survivability, elimination of cavitation limits, greater payload capability, and the addition of a significant emergency propulsion system. These advantages can be obtained with a magnetohydrodynamic propulsion system that is neutrally bouyant and can operate with the existing submarine propulsion system power plant. A thorough investigation of magnetohydrodynamic propulsion systems for submarine applications has been completed. During the investigation, a number of geometric configurations were examined. Each of these configurations and mounting concepts was optimized for maximum performance for a generic attack class submarine. The optimization considered each thruster individually by determining the optimum operating characteristics for each one and accepting only those thrusters that result in a neutrally buoyant propulsion system. The results of this detailed optimization study show that the segmented, annular thruster is the concept with the highest performance levels and greatest efficiency and offers the greatest potential for a practical magnetohydrodynamic propulsion system for attack class submarines. The optimization study results were used to develop a specific point design for a segmented, annular magnetohydrodynamic thruster for an attack class submarine. The design point case has shown that this thruster may be able to provide the necessary thrust to propel an attack class submarine at the required velocity with the potential for a substantial acoustic signature reduction within the constraints of the existing submarine power plant and the maintenance of neutral buoyancy. This innovative magnetohydrodynamic propulsion system offers an approach for submarine propulsion that can be an important contributio

关键词： Ship Propulsion

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DPRL: a language for representation of operation and safety maintenance procedures of nuclear power plants 90

DPRL: a language for representation of operation and safety ...

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Proceedings of the 3rd international conference on Industrial and engineering applications of artificial intelligence and expert systems - Volume 2

作者： Rajiv Bhatnagar D. W. Miller B. K. Hajek B. Chandrasekaran Center for Space Research Massachusetts Institute of Technology Cambridge MA Nuclear Engineering Program The Ohio State University Columbus Ohio Department of Computer and Information Science The Ohio State University Columbus Ohio

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BOTTOM BOUNCE ARRAY SONAR SUBMARINE (BBASS)

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NAVAL ENGINEERS JOURNAL 1989年第5期101卷 59-72页

作者： JACKSON, HA NEEDHAM, WD SIGMAN, DE USN (RET.) Capt. Harry A. Jackson USN (Ret.) is a graduate of the University of Michigan in naval architecture and marine engineering and completed the General Electric Company's 3-year advanced engineering course in nuclear engineering. He has been an independent consulting engineer and participated in projects involving deep submergence waste disposal water purification and submarine design both commercial and government. Cdr. William D. Needham USN is currently assigned as the repair officer of USS Hunley (AS-31) in Norfolk Virginia. He received a regular commission through NROTC at Duke University where he graduated magna cum laude in mechanical engineering. Selected for the Nuclear Power Program he served as a division officer on the USS Grayling (SSN-646) as the production training assistant at the MARE Prototype Reactor in New York and as blue crew engineer of the USS Nathan Hale (SSBN-623) where he completed the requirements to be designated qualified for command of submarines. Following line transfer to the EDO community in 1981 he completed a tour as nuclear repair officer (Code 310) at Norfolk Naval Shipyard and earned master of science in materials science and ocean engineer's degrees at MIT. His awards include the Meritorius Service Medal Navy Commendation Medal Navy Achievement Medal Spear Foundation Award and the Vice Admiral C.R. Bryan Award. Cdr. Needham also holds a master of arts degree in business management from Central Michigan University. Capt. Jackson was technical director of Scorpion Search Phase II. The on-site investigation included descending over 12 000 feet to the bottom of the ocean. He was also supervisor of one of the Navy's largest peacetime shipbuilding and repair programs. His responsibilities included supervision of design production and contract administration. Capt. Jackson was third from the top in managaement of a major shipyard and responsible for design material procurement work order and financial control of two major surface ship prototypes as well a

Anticipated technological advances in the quieting of potential adversary submarines mandate the use of increasingly effective detection systems for U.S. ASW forces. Based on the assumptions that sonar will continue to be the primary means of detection and that the effectiveness of each individual sonar element will not change markedly, one must increase the projected area of the sonar array to improve its capability. The primary SSN mission of anti-submarine warfare will hence require increasing the hull area devoted to the primary sonar detection system. A revolutionary hull form is proposed that maximizes the area available for this purpose. The advantages and disadvantages of this hull form are discussed and feasibility study level design parameters and arrangements presented.

关键词： Submarines

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SIMPLIFICATION OF GAS-TURBINE INTAKE ANTI-ICE SYSTEMS

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NAVAL ENGINEERS JOURNAL 1988年第1期100卷 45-52页

作者： EXELL, JR KILLINGER, A LCdr. John R. Excell: USN received a bachelor of architecture from the University of Michigan and a master of science degree in mechanical engineering from the U. S. Navy Postgraduate School. He was commissioned in 1973 serving first as damage control assistant aboard USSGuadalcanal(LPH-7) and later as commissioning main propulsion assistant on USSMerrill(DD-976). He became an engineering duty officer in 1979 and served at Norfolk Naval Shipyard as senior ship superintendent for six ships and later within the shipyard Design Department. In May 1984 LCdr. Exell was assigned to the DD-963 Class Special Projects Office as program manager for air system improvements including the bleed air and anti-ice systems. He recently completed the Defense Systems Management College Ft. Belvoir VA and returned to NavSea PMS 377 as deputy for strategic sealift programs. Arthur Killinger:graduated from the University of Maryland in 1968 with a bachelor of science degree in mechanical engineering. He joined MPR Associates Inc. working on submarine safety design reviews following the loss of USSScorpion(SSN 589). After two years in the U.S. Army Nuclear Reactor Program and a year as U.S. Army engineer maintenance advisor in the Republic of Vietnam he returned to MPR Associates Inc. in 1972. Since then he has worked on nuclear power plant projects for several electric utilities as well as submarine and surface ship overhaul and maintenance improvement programs for the U.S. Navy. Mr. Killinger is a member of the American Society of Naval Engineers and the American Society of Mechanical Engineers.

This paper describes the steps taken to simplify the gas turbine intake anti-ice systems on DD-963 and DDG-993 class ships. The anti-ice system was designed and built as fully-automatic protection against intake duct icing on main propulsion turbines and electric generator turbines. Operating experience with the system indicated that it was nonfunctional more than 60% of the time. The system's poor availability was caused by its complexity, lack of use, lack of spare parts, poor training and documentation, and design and material problems. A Navy Independent Design Review Team (IDRT) reexamined the technical bases for installing an automatic anti-ice system and demonstrated that automatic control was not necessary for gas turbine intake duct anti-icing. A series of design review calculations and shipboard tests confirmed that anti-icing protection could be provided by manual control of installed butterfly valves feeding hot air to each turbine intake. The time from the IDRT design simplification recommendations to the first modification of the anti-ice system was less than one year. To date, half of the 30 of the 35 ships in the two classes have been modified. This system simplification will result in life cycle maintenance cost savings in excess of 13 million dollars. Future CG-47 class and DDG-51 class ships will include this simplified approach to anti-ice system design for gas turbine intakes.

关键词： GAS TURBINES

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ATOMIC PHYSICS EXPERIMENTS WITH THE CORNELL ELECTRON-BEAM ION-SOURCE

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nuclear INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 1987年第1期262卷 110-113页

作者： KOSTROUN, VO JANSON, SW Nuclear Science and Engineering Program Work supported in part by the US Department of Energy Office of Basic Energy Sciences Division of Chemical Sciences. Ithaca NY 14853 United States

Over the past three years, a superconducting solenoid, cryogenic electron beam ion source has been designed, constructed and tested at Cornell University. The source is designed for atomic physics experiments requiring low energy, very highly charged ion beams. The present status of the source is discussed and its use in some preliminary atomic physics experiments is described.

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U. S. NAVAL ACADEMY'S NEW YARD PATROL CRAFT: FROM CONCEPT TO DELIVERY.

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Naval Engineers Journal 1987年第1期99卷 37-58页

作者： Compton, Roger H. Chatterton, Howard A. Hatchell, Gordon McGrath, Frank K. Roger H:. Compton is a Webb graduate who since 1966 has been a part of the naval architecture faculty at the U.S. Naval Academy. Since accepting the appointment to the Academy he has been instrumental in establishing the ABET accredited major program in naval architecture in the conceptual design and operation of the Naval Academy Hydromechanics Laboratory and in the conceptual design of the 108-ft yard patrol craft. Besides his Naval Academy involvement he serves as an adjunct professor with Virginia Polytechnic Institute in its NAVSEA Institute graduate program at Crystal City. He is an active member of both ASNE and SNAME and has published technical papers with both societies. Howard A. Chatterton:began his career as a Navy coop student at the Boston Naval Shipyard in 1960. He received his bachelor's degree in naval architecture and marine engineering from Massachusetts Institute of Technology in 1966 and his master's degree in 1968. He was employed by the Preliminary Design Division of BuShips in the submarine design and hydrofoil design groups until 1972 when he joined the Coast Guard's Naval Engineering Division. He remained with the Design Branch until 1981 when he accepted a faculty position at the U.S. Naval Academy as the research director for the Academy's hydromechanics laboratory. He has recently returned to Coast Guard Headquarters as the assistant chief Naval Architecture Branch Office of Merchant Marine Safety. Gordon Hatchell:is a naval architect at the Naval Sea Combat Systems Engineering Station Norfolk Virginia in the Combatant Craft Engineering Department. He served as lead-ship YP project engineer from its inception to delivery and continues to serve as project coordinator on follow-up ship procurements. He has worked on other boat procurements as well as serving as weight and stability coordinator. Mr. Hatchell began his engineering career in the Design Division at the Norfolk Naval Shipyard in Portsmouth Virginia after receiving a BS in civil engineering from Virginia Polytec

The design of the new 108-ft yard patrol craft (YPs) for the U. S. Naval Academy is described from its beginnings as a senior midshipman design project, through its preliminary and contract design development at the U. S. Navy's small craft design team headquarters, Naval Sea Combat Systems engineering Station, Norfolk, Virginia (NAVSEACOMBAT-SYSENGSTA-Norfolk). During preliminary and contract design the Naval Academy Hydromechanics Laboratory (NAHL) provided experimental data to support NAVSEA-COMBATSYSENGSTA-Norfolk's design analyses in powering, seakeeping, and maneuvering. Several tradeoff studies of interest to patrol craft designers are presented. Major events in the detail design and construction of the first boat are described from both the designer's and the shipbuilder's points of view. The launching, builder's and sea trials of the first boat are described.

关键词： NAVAL VESSELS

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A rationalization of stress-strain behavior of two-ductile phase alloys

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Metallurgical Transactions A 1986年第12期17卷 2209-2226页

作者： Ankem, S. Margolin, H. Engineering Materials Program Department of Chemical and Nuclear Engineering University of Maryland College Park Department of Metallurgy and Materials Science Polytechnic University Brooklyn

An extensive literature review indicated that the law of mixture rule can at times account for stress-strain behavior of two-ductile phase alloys in terms of the stress-strain behavior of component phases. In the present investigation, various factors which can contribute to the stress-strain behavior of two-ductile phase alloys are considered, using Ti-Mn alloys as the model system. Particular attention is focused on the effect of elastic, elasto-plastic, and plastic interactions between the phases on the stress-strain behavior. It is shown that the law of mixture cannot adequately explain the stress-strain behavior. The following equation is proposed to describe the stress-strain behavior of two-ductile phase alloys: Pα-β = fαPα c + fβPβ c + Iα-β p, where Pα-β is a given stress-strain property, fα and f/gb are respective volume fractions of α and β-phases, Pα c and Pβ c are corrected properties of α and β-phases, and Iα-β p is the interaction term. It is found that for α- β Ti-Mn alloys, for 0.2 pct yield strength, Iα-β p is positive, negative, or zero depending on the microstructure; but Iα-β p is always positive for the ultimate tensile strength and strain hardening rates and its magnitude depended on the microstructure. The reasons for the nature or sign of the interaction parameter for a given property are discussed in detail.

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