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A FIBER OPTIC-sYsTEm FOR DAmAGE AssEssmENT OF FRP COmPOsITE sTRUCTUREs

NAVAL ENGINEERs JOURNAL 1984年第6期96卷 52-56页

作者： CRANE, Rm mACANDER, AB Roger M. Crane:isa materials engineer in the Ship Materials Engineering Department of the David W. Taylor Naval Ship Research and Development Center (DTNSRDC) Annapolis Md. He is presently involved in the development of fiber reinforced advanced composite materials for various naval applications. He received his B.S. degree in physics/engineering and his B.A. degree in mathematics: physical applications from Loyola College. He has finished his course work for his M.S. degree in materials science at the University of Delaware and is currently enrolled at the Johns Hopkins University. Mr. Crane is a member of Society of Experimental Stress Analysis and the Society of Physics Students. Aleksander B. Macander:is a materials engineer in the Ship Materials Engineering Department DTNSRDC Annapolis Md. He is presently involved in the development of fiber reinforced advanced composite materials for various naval applications. Prior to joining DTNSRDC in 1973 he was associated with the Johns-Manville Corporation Denver Colo and also with the Naval Applied Science Laboratory Brooklyn N.Y. He received his B.S. degree in mechanical engineering from Fairleigh Dickinson University and his M.S. degree in mechanical engineering (plastics) from Stevens Institute of Technology. Mr. Macander is a member of ASTM the Severn Technical Society and the International Organization for Standardization/Technical Committee 61 on Plastics.

There are a limited number of nondestructive techniques available for field inspection of large composite structures and practically none for inservice inspection. An innovative damage assessment system is proposed which uses an optical fiber m.s. implanted into the body of a fiber reinforced composite structure. This m.s. would become an integral part of the structure on fabrication. The selection of the m.s. fibers would be predicated on their strain to failure characteristics and strain compatibility with the base composite reinforcing fibers. This optical system will be capable of locating damage, assessing severity and monitoring damage growth. A successful implementation of the total damage assessment system would involve the interaction of the optical fiber m.s. with an adequately designed interrogative electronic package. This paper focuses on the former aspect of the total system. It will address some recent experimental work showing the practicality of the concept for large, complex composite structure.

关键词： FIBER OPTICs

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sHIP COmBAT sYsTEm.s.mULATION (sCss)

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NAVAL ENGINEERs JOURNAL 1984年第3期96卷 142-148页

作者： mENsH, DR The Authorreceived his B.S. and M.S. degrees in applied physics from Loyola College in Baltimore Md. and the American University in Washington D.C. He also has completed his course work towards his Ph.D. degree in computer science specializing in the fields of system analysis and computer simulation. He has been employed at the Naval Surface Weapons Center White Oak Laboratory Silver Spring Md. for the past seventeen years in the areas of weapon system analysis and the development of weapon system simulations. Since 1978 he has been involved in the development of simulation tools that can be applied to the solution of shipboard combat system architecture and engineering problems. Currently at the White Oak Laboratory he is responsible for the application of and further development of the Single Ship Combat System Simulation.

This paper will describe a combat system integration and analysis tool called the ship Combat system.s.mulation (sCss). The sCss was designed as an analysis tool to study sensor command and control and weapon system integration for shipboard combat systems. The simulation represents the combat system components as nodes in a network. Data flows between the nodes through the links. sCss is a structured program simulation written in simscript II.5. The structured program feature allows for ease of combat system reconfiguration into different types of architectures. Consequently, ssCs can be used to study and analyze different combat system architectures. Currently the model has an antiairwarfare (AAW) capability and a partial antisurface warfare (AsUW) capability. The model has been used in ship vulnerability and survivability studies, individual combat system component studies, component trade-off analysis; and total system reaction time analysis. Figure 1 presents a sample of a sCss link-node diagram. Figures 8 and 9 present combat system.s.quence and timing diagrams. The model boasts a postprocessing capability that includes both statistics and graphics packages. The sCss has been developed jointly by the Naval Weapons Center, Naval Ocean systems Center, Naval surface Weapons Center, Naval ships Weapons systems Engineering station, and CACI, Inc. sCss is supported by naval and industrial laboratories throughout the country. The users of the simulation belong to the sCss User's Group which meets periodically throughout the year. members of the User's Group develop equipment nodes and exchange ideas. The User's Group maintains sCss configuration management allowing for simscript II.5 code written by any one user to be used by all other users.

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HUmAN-FACTORs CONsIDERATIONs applied TO OPERATIONs OF THE FFG-8 AND LAm.s.mK III

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NAVAL ENGINEERs JOURNAL 1984年第3期96卷 191-199页

作者： BAITIs, AE APPLEBEE, TR mCNAmARA, Tm A. Erich Baitis: a native of Germany came to the David W. Taylor Naval Ship R&D Center in 1957 as a cooperative student/trainee and received his B.S. degree in physics from Virginia Polytechnic Institute. As a 32-year-old naval architect in 1971 he received both the Vietnam Honor Service Medal and the Navy's Meritorious Civilian Service Award for his eight months as liaison with the Vietnamese Navy's ferro-cement program. As head of the Seakeeping and Stabilization Group of the Surface Ship Dynamics Branch his work has led to the development of a new standard Ship Motion Computer Program and the application of ship motions to ship habitability operability and survivability problems. A major area of this work has been the ship-aircraft interface which is particularly sensitive to ship motions wind and other environmental factors. He is a member of the American Society of Naval Engineers and was awarded the Solberg Award for 1982 “in recognition of significant engineering research and development contributions in the area of improved helicopter operations from a ship in a seaway.” Terrence A. Applebee:is currently a naval architect at the David W. Taylor Naval Ship R&D Center in the Surface Ship Dynamics Branch. he came to the Center after earning a B.S. degree in ocean engineering from Florida Institute of Technology in 1973. Since that time he has worked in the areas of seakeeping performance evaluation ship-helicopter interfacing and human factor considerations. He is a member of the American Society of Naval Engineers and the Society of Naval Architects and Marine Engineers. Thomas M. McNamara:is an employee of the John Hopkins University Applied Physics Laboratory in the ocean data acquisition program. From 1979 to 1983 he worked at David W. Taylor Naval Ship R&D Center in the Surface Ship Dynamics Branch. His expertise has focused on the development of computer models for human factor evaluations as well as motion stabilization systems. He has participated in the development of advanced stabilizat

The FFG 7/LAm.s.mK III Operator Guidance manual (OGm) was developed for all FFG-7 class frigates which are not fin stabilized or are operating with the fins off. The OGm was developed to assis the ship operators of the FFG-7 class in choosing ship speed and heading combinations which will minimize ship motion-related problems during various phases of the LAm.s.deployment. Crew safety and performance were major concerns in the development of the OGm. This paper reviews the effect of human factors on ship operations during helicopter recovery, maintenance, and transit to and from the hangar.

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AN ADVANCED mETHODOLOGY FOR PRELImINARY HULL FORm DEVELOPmENT

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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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microhardness of rhombohedral crystals: Calcite and sodium nitrate

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Bulletin of materials science 1983年第1期5卷 79-82页

作者： Pandya, J.R. Bhagia, L.J. shah, A.J. Applied Physics Department Faculty of Technology and Engineering M.S. University of Baroda Baroda 390 001 India

The variation of hardness of rhombohedral single crystals of calcite and sodium nitrate with quenching temperature is studied. Vickers and Knoop hardness numbers are determined from the indentations produced on freshly-cleaved crystal surfaces for various loads. The variation of hardness number with quenching temperature can be represented by HT<sub> qsub><sup> ksup> =constant where the exponent k is less than unity and its sign determines the nature of material. © 1983 the Indian Academy of sciences.

关键词： calcite hardness numbers microhardness quenching temperature sodium nitrate

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FOCAs - A NEW LOOK IN COmBAT sYsTEm.s.GNAL TRANsm.s.ION

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NAVAL ENGINEERs JOURNAL 1983年第3期95卷 51-62页

作者： sLEmON, Cs ABBOTT, JW Charles S. Slemon:graduated from Brown University with an Sc.B. Degree in Physics and did graduate work in semiconductors at the School of Electrical Engineering Cornell University sity receiving an M.S. degree. In 1972 he received an NSF grant to study the temperature dependence of crystal structures and while at Cornell he developed various fabrication and testing techniques with new semiconductor compounds. Upon joining Tetra Tech Inc. in 1976 he established and is responsible for their fiberoptic laboratory. He has carried out many programs involved in fiberoptic links for secure communication for various government agencies in which he authored numerous classified reports and developed special fiberoptic devices and system. He has also carried out studies and hardware development and evaluation programs for the military and commercial clients including marine and deep sea uses of fiberoptics for NOSC ONR and other off-shore industry contractors. For NAVSEA he authored several reports investigating the potential uses and advantages that fiberoptic technology offers to Navyshipboard operations. Mr. Slemon has published many articles and made numerous presentations in the field of fiberoptics. He has also taught several short courses on the subject and is the holder of several patents. Mr. Jack W. Abbott:received his BSME degree from Stanford University in 1960 and his Masters (MEA) degree from George Washington University in 1975. He holds a Professional Engineer License in the state of California. Mr. Abbott served as a naval officer – aboard a destroyer for 3 years. He worked for the Garrett Corporation for nearly 8 years involved with gas turbine design development and application. For the last 15 years Mr. Abbott has been directly involved with all aspects of destroyer design including the Canadian DDH 280 U.S. DD 963 and DD 993 destroyers. Currently Mr. Abbott is the NAVSEA Program Manager of the Ship Systems Engineering Standards (SSES) Program – responsible for developing combat system inter

This article introduces the concept of a truly Universal signal Distribution Network. The emergence of fiberoptic technology as a viable signal transm.s.ion medium now gives the N avy the opportunity to use Fiber Optic Cabling and switching (FOCAs) to implement a universal network. A FOCAs Network can handle all present or future shipboard signal distribution architectures such as point-to-point or data bus. Furthermore, compared to existing cable installations, this network offers lower cost through reduction of the number of cables, weight, and volume, freedom from interference and EmP effects, increased redundancy, and higher operational flexibility. In addition, it will easily satisfy all future expansion or changes in signal distribution by providing at least a ten fold increase in data rate capacity over existing electrical cabling. This last feature alone holds the potential for allowing upgrading and conversion of modern combat systems without need for adding new cabling in the ship. Along with the introduction of the concept of a Universal FOCAs network and its practical benefits and capabilities, this article presents a trade-off between the Radar Data Distribution Network on the FFG and an analogous FOCAs network. Though far from optimized, the resultant FOCAs network shows that the conversion of existing shipboard networks to FOCAs is straightforward and provides a reduction of at least 90% in cable volume and weight and lower cost in cable purchase and installation.

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Repair of TmI-1 OTsG tube failures. Use of a kinetic tube-expansion process to resesal tubes within the upper tube sheet provides a cost-effective and relatively low-expousure repair process

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Process safety Progress 1983年第3期2卷 173-175页

作者： David G. slear Robert L. Long Jam.s.D. Jones F. s. Giacobbe GPU Nuclear Parsippany N.J. 07054 In 1974 David Slear joined General Public Utilities Nuclear Corp. where his responsibilities included the design review of components for new nuclear power plants and troubleshooting component failures both in nuclear power and fossil plants in the GPU System. In 1978 he was promoted to Preliminary Engineering Manager and was responsible for coordinating the preparation of design criteria for several coal-fired plants and combustion turbines to be installed throughout the 1980s. Immediately following the TMI-2 accident he was placed in charge of coordinating the establishment of criteria and the design for numerous modifications that were perceived to be required in order to maintain core cooling and a stable safe shutdown condition for the TMI-2 reactor. Subsequently he was promoted to Manager of TMI Engineering Projects which involved establishing the criteria and coordinating the engineering for the numerous modifications required to TMI-1 as a result of the Lessons Learned from the accident at TMI-2. He holds a B.S. Degree in Mechanical Engineering and an M.S. Degree in Mechanical Engineering. Since April 1982 Robert L. Long has been Vice President and Director of the Nuclear Assurance Division of the GPU Nuclear Corp. This includes responsibilities for the Quality Assurance Department the Nuclear Safety Assessment Department the Training & Education Directorate and the Emergency Preparedness Department. Joining GPU in 1978 he has been actively involved with Three Mile Island recovery and restart activities since the spring of 1979. From February 1980 through March 1982 he served as Director–Training & Education for GPU Nuclear. He holds the B.S. degree in Electrical Engineering from Bucknell University and the M.S.E. and Ph.D. degrees in Nuclear Engineering from Purdue University. He has written numerous publications and has presented lectures on “energy and the environment” issues all over the United States and in Southeast Asia. Since joining GPU Nuclear Corpo

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DImER CENTERs IN VARIOUsLY PRETREATED THALLIUm DOPED sODIUm-HALIDEs

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ZEITsCHRIFT FUR PHYsIK B-CONDENsED mATTER 1982年第1期46卷 13-16页

作者： JOsHI, RV NENE, JG Applied Physics Department Faculty of Technology and Engineering M.S. University of Baroda Baroda India

A detailed examination of the luminescent characteristics of variously pretreated heavily doped NaBr:Tl phosphors has been carried out. A prominent em.s.ion band at 420 nm exhibited by the phosphor is attributed to the electronic transitions within Tl+ ion perturbed by the presence of another Tl+ ion occupying nearest neighbour alkali ion site, the centre so formed being known as dimer. It is rather surprising that the dimers are conspicuous by their absence in heavily doped NaCl:Tl phosphors. This aspect of the result is discussed on the basis of the relative sizes of the ions in the phosphors.

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ANALYsIs OF LEAKY AQUIFER PUmPING TEsT DATA - AN AUTOmATED NUmERICAL-sOLUTION UsING sENsITIVITY ANALYsIs

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GROUND WATER 1982年第3期20卷 325-333页

作者： COBB, Pm mCELWEE, CD BUTT, mA Kansas Geological Survey 1930 Ave. A Campus W. The University of Kansas Lawrence Kansas 66044. Patrick M. Cobb received B.S. degree in Geophysics in 1976 and M.S. degree in Water Resources Science in 1980 both from the University of Kansas. The thesis topic was natural salt-water intrusion in the Great Bend Prairie in south-central Kansas. Since 1979 he has been employed by the Kansas Geological Survey in the Geohydrology Section. The hydrology of the Great Bend Prairie and applied numerical modeling are continuing topics of interest. Carl D. McElwee graduated in 1965 from William Jewell College with a B.A. in Physics. He received M.A. and Ph.D. degrees from the University of Kansas in 1967 and 1971 respectively. His research area was solid-state physics. From 1971 to 1974 he worked for Texaco Inc. in Houston Texas as a research geophysicist. Since 1974 he has worked for the Kansas Geological Survey in the Geohydrology Section. His area of special interest is ground-water models. Munir A. Butt graduated in 1969 from Regional Engineering College Kashmir with B.E. (Civil). He received M.E. degree from Roorkee University India in 1973 and M.S. degree in Water Resources Engineering from the University of Kansas in 1977. From 1969 to 1975 he worked as Assistant Engineer Kashmir Irrigation and Flood Control Department. Presently he is at the University of Kansas and works as research assistant for the Kansas Geological Survey in the Geohydrology Section.

The Kansas Geological survey is pursuing an effort to automate some of the more common methods of aquifer pumping-test analysis. This paper discusses the results of work done on the leaky artesian aquifer as defined by Hantush and Jacob (1955). The paper covers the basic theory of the aquifer type, the numerical solution of the leaky artesian-well function, and the methodology of achieving the “best fit” parameters in the least squares' sense. several data sets are used to demonstrate the applicability of the proposed technique. These examples indicate the generally satisfactory results produced by the automated analysis documented here. The algorithm has good convergence properties. Initial estimates for the aquifer parameters may vary by about three orders of magnitude above or below the correct values. For typical data sets the rms fitting error should be less than a few tenths of a foot. If this is not the case, one is probably not dealing with a simple leaky aquifer. This method of pumping-test analysis does not eliminate the role of an experienced hydrologist to define the local hydrogeology and aquifer type. However, once the decision is made as to which aquifer configuration is being observed, this program will, in a quick and unbiased fashion, give an accurate assessment of the leaky-aquifer parameters within the limits of the theoretical approximations and the data quality.

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sYNTHETIC FUEL CONsIDERATIONs FOR NAVAL sHIPBOARD UsE

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NAVAL ENGINEERs JOURNAL 1982年第2期94卷 286-295页

作者： FAIRBANKs, JW KENYON, CW Capt. John W. Fairbanks USNR:received his M.S. degree from the University of Santa Clara and his B.S. degrees from Stanford University and the Maine Maritime Academy. He taught at the Texas A&M University and the University of Maryland and from 1954 until 1957 served in the U.S. Navy in the Pacific. Subsequently he was a Research Engineer with Hiller Aircraft where he worked on the annular ejector and designed the High-Speed Bearing and Shaft Test Stand for XC-142A and later at Philco Ford worked on advanced space power systems. At NASA-Goddard in 1967 as a Power System Engineer he was employed on several space craft including the Orbiting Astronomical Observatory. From 1971 until 1977 he was employed by the Naval Ship Engineering Center (NAVSEC) as a Program Engineer for FT9 Marine Gas Turbine Development and the Ceramic Demonstrator Gas Turbine and also as Coordinator of Gas Turbine Material Development. In addition he organized the first two Gas Turbine Materials on Marine Environment Conferences and the U.S. participation in the U.S. Navy/Royal Navy Conference. Currently he is a Program Manager in Applied Heat Engine High Temperature Materials and Instrumentation at the Department of Energy (DOE) where he also served as Chairman Engineering Materials Coordinating Committee for DOE. A Naval Reserve Captain and Chairman of the ASME Washington Chapter he also is the former President of the Washington Chapter of the Maine Maritime Academy Alumni former Vice-President of the Stephen Decatur Chapter Naval Reserve Association and the outstanding 1975 Maine Maritime Academy Alumni. Capt. Fairbanks has authored over forty-five technical papers and in both 1974 and 1975 was the winner of the ASE Niedermair Award. Mr. Clarence W. Kenyon:graduated from the State University of New York Maritime College in 1960 and sailed on a Third Assistant Engineer's license with Isbrandtsen Steamship Company before accepting an engineering position with the Long Beach Naval Shipyard in 1961. In addition to his responsibilit

synthetic fuels are assessed with respect to their potential use aboard Navy ships. The status of petroleum resources and the development of fuels from.s.ale, coal, and biom.s. is summarized. A scenario of the projected availability of these fuels is presented which shows the sensitivity to funding and schedule. Diesel engine and gas turbine combustor tests with small quantities of coal derived and shale derived fuels are described and these tests results are evaluated for shipboard applications. special shipboard modifications are discussed such as the replacement of rubber base seals, gaskets, and hoses with viton and teflon, and the use of stainless steel piping because of the fuel characteristics. Considerations for dual fuel systems using Diesel Fuel marine for starting, stopping, and maneuvering are included based upon early test results. Consideration is given to the use of these fuels in the shipboard environment since they require special handling and adoption of personnel safety measures.

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