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Utilization of root cause failure analysis in the investigation of marine deck fitting failures

naval ENGINEERS JOURNAL 2001年第1期113卷 93-99页

作者： Huff, DS Lynaugh, KM David S. Huff graduated from the University of Maryland with a B.S.M.E. in 1972 and a M.S. in technology management in 1995. Prior to government service he worked for Newport News Shipbuilding as a fluid systems engineer and for Gibbs & Cox as a project engineer. Mr. Huff entered government service in 1977 with the Military Sealift Command Engineering Operations Division then as a construction representative and finally as deputy director ship design and construction. He then moved to NAVSEA in 1989 as assistant project manager on the conversion of AO-177 oilers to AO (JUMBO). From 1993 through 2000 he was assistant project manager for the construction of T-AKR-300 Class of Strategic Sealift RO/RO ships at Avondale. Currently Mr. Huff is manager of the Advanced Projects Group within the PEO EXW Auxiliary Boats and Crafts Program Office. Kevin M. Lynaugh obtained his naval architecture and marine engineering degree from University of California Berkeley in 1984. He obtained his Master's degree in science and engineering from The Johns Hopkins University in 1997 with a dual major in program management and operations management. He has been with NAVSEA Naval Surface Warfare Center Carderock Division for over 16 years. He spent four years with the Hydromechanics Division computerizing the Model Design Group two years with the Large Cavitation Channel Project as a project engineer six years with the Ship Building Technologies Department as a task area manager managing research programs the past 3 ½ years with the Strategic Sealift Program as the ship design manager for Avondale's new con-struction and as the deputy assistant program manager for post delivery and NASSCO's new construction. Currently Mr. Lynaugh is the on-site ship design manager for LHD-8 at Ingalls Shipyard in Pascagoula Mississippi.

Cracking was discovered in the openings of cargo deck tie down fittings on ships under construction. There was a distinct possibility that these cracks could propagate through the fittings and into the strength deck plating, affecting the ships hull integrity. With more than 14,000 fittings installed on each ship, the appearance of approximately 400 cracks at the mid-ship area of the main and lower decks raised production and operational concerns. This paper will discus the successful application of a Root Cause Failure Analysis (RCFA) methodology employed by a Corrective Action Team (CAT) establish to solve the problem. Through their efforts and the systematic application of RCFA, various failure hypotheses were validated or discounted and consensus was achieved on the appropriate corrective action.

关键词： Marine engineering

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Future USN aircraft carrier analysis of alternatives

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naval ENGINEERS JOURNAL 2000年第3期112卷 15-25页

作者： Raber, JD Perin, DA Mr. James D. Raber:received a master of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology in 1967. Since 1967 he has worked for the Navy Sea Systems Command (NAVSEA) and predecessor organizations in the area of early stage design of naval ships. Among the major USN programs he has supported are the FFG 7 and DDG 51. In the late ‘70s he was the NAVSEA representative to the CNO DDX Study Group which established the general requirements for the DDG 51 class. He has been active in international technical exchange programs for which he was awarded membership in the National Order of Merit by the Republic of France in 1992. Since early 1996 he has been the NAVSEA Ship Concept Team Leader for what is now the CVNX Program. Dr. David A. Perin:received a PhD in mathematics from the University of Michigan in 1971. He joined the Center for Naval Analyses in 1973 where he has led a wide variety of studies on naval warfare. From 1985 to 1987 he served as the CNA representative on the staff of Commander Striking Fleet Atlantic for which he was awarded a Defense Distinguished Service Medal. During the 1990s he has led formal analysis of alternatives for the LPD-17 F/A-18E/F and CVX. Currently he is the Director of the JCC(X) Analysis of Alternatives.

In March 1996, the Department of Defense established a new program, then known as CVX, to develop a new class of aircraft carrier that would eventually replace the Nimitz class. The first step in the concept develop was exploring a wide range of alternative design concepts in a formal study known as an Analysis of Alternatives (AOA), which assessed their cost and operational effectiveness. About 70 total ship studies were developed to explore the range of design features, including airwing size and type, propulsion type, ship mobility performance, and a variety of survivability features. The AOA also assessed the performance of and total ownership cost of a large number of potential subsystem technologies. This paper summarizes the total ship studies developed for the AOA describes the ship system performance and total ownership cost of these alternatives, and discusses the rationale for determining some of the primary system requirements. Thus, the paper will provide insight into the Navy's intentions for system requirements and features to be incorporated into the U.S. Navy's future aircraft carriers.

关键词： design features Aircraft survivability ANGLE OF ATTACK United States Department of Defense system requirements Alternatives analysis AIRCRAFT CARRIER Ships Total Costs

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The road to Impeccable -: An uncommon approach to ship acquisition

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naval ENGINEERS JOURNAL 1999年第3期111卷 245-255页

作者： Shen, TWT Proctor, BL Saha, D Mr. Terry Shen:is the Assistant Project Manager for the Ocean Surveillance Ship (T-AGOS 23) Acquisition Project at Naval Sea Systems Command (NAVSEA). He is responsible for the program management of the large SWATH (Small Waterplane Area Twin Hull) ship construction in the Gulf region. Mr. Shen has over 14 years of experience in ship acquisitions and has co-authored several technical papers published by the Association of Scientists & Engineers the Society of Naval Architects & Marine Engineers and the American Society of Naval Engineers. He is a graduate of the University of Maryland with a BS in aerospace engineering and a BA in speech communication a 1986 graduate of the DSMC Program Management Course and a 1991 graduate of the Virginia Polytechnic Institute with an MBA in business administration. Mr. Barry Proctor:is NAVSEA's Ship Design Manager for the T-AGOS 23 program. He has held this position since March 1997. Prior to that time he was NAVSEA's Ship Design Manager for the T -AKR 300 class vessels. He has over 18 years of experience as a Naval Architect for NAVSEA (O3D). He has a BS in civil engineering from the University of Maryland and an MS in naval architecture and marine engineering from the University of Michigan. Mr. Deepak Saha:provides design support to NAVSEA's Program Office and Ship Design Manager on the T -AGOS 23 ship acquisition. His involvement with the program started at the time the first shipbuilder declared bankruptcy. He is Manager of the Commercial Ship Design Group at M. Rosenblatt & Son Inc. (MR&S) Arlington Branch. He has over 26 years of experience as a marine engineer and naval architect. He obtained a BS in marine engineering from Calcutta India in 1972 and a BSE in naval architecture from the University of Michigan in 1983. He also holds a Chief Engineer's License (Unlimited Horsepower Diesels).

The road to the acquisition of the USNS Impeccable (T-AGOS 23) has seen a few uncommon and challenging twists and turns, resulting in delays and disruption to the program. The saga began in 1993, when the original shipbuilder, facing financial difficulties, filed for Chapter XI bankruptcy protection. For two more years the program was stalled before the Navy was able to warrant the work that had been done up to that point. In 1995 the contract was reassigned to another shipbuilder to complete the vessel and obtain the necessary certificates to comply with all the applicable requirements of the American Bureau of Shipping (ABS). This unprecedented approach put the Navy in the unique situation of being responsible for two of the most controversial issues in a ship construction process, i.e., detail design and equipment warranties. This paper gives the status of the program, discusses how various technical issues and production demands are being addressed, and describes the future hurdles that need to be overcome before delivery of the vessel.

关键词： Ships SPT/ADA/Gcn5 Acetyltransferase Road Navy Shipyards

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Uniform National Discharge Standards - Overview and implications for future naval engineering

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naval ENGINEERS JOURNAL 1999年第3期111卷 219-235页

作者： Kopack, D Smith, G Kim, D Erne, DL David F. Kopack:is a Program Manager in the Naval Sea Systems Command Office of Environmenta1 Protection Occupational Safety and Health SEA 00T. Mr. Kopack received his bachelor and master of science degrees in the physical sciences and management from the University of Maryland. Mr. Kopack has 20 years of experience in ship design and engineering industrial facility operations and program management. Gordon D. Smith:is a Chemical Engineer with the Carderock Division Naval Surface Warfare Center in Bethesda Maryland and is working in the Naval Sea Systems Command Environmental and Auxiliary Systems Group. SEA 03L. Mr. Smith received his bachelor of science degree in chemical engineering from The Ohio State University. He has over 13 years of ronmental issues. In addition to supporting the development of Uniform National Discharge Standards he has been involved in research design testing and development of pollution abatement technologies suitable for use aboard Navy Ships. Don K. Kim:is a Senior Mechanical Engineer with the naval architecture and marine engineering firm of M. Rosenblatt & Son Inc. in Arlington Virginia. Mr. Kim received his bachelor of science and master of engineering degrees in mechanical engineering from the University of Virginia. He is a registered Professional Engineer in the Commonwealth of Virgina. Mr. Kim has ten years of experience in the design installation maintenance and repair of shipboard mechanical systems equipment and components with specific expertise in compressor pump and fan design and operation. He is a member of the American Society of Naval Engineers and the American Society of Mechanical Engineer. David L. Erne:is an Associate with Booz Allen and Hamilton Inc. in Arlington Virginia. Mr. Erne received his bachelor of science degree in chemical engineering from the University of Idaho. He has over twelve years of experience in environmental program management and consulting. In addition to his support for the Uniform National Discharge Standards prog

In the Fiscal Year 1996 National Defense Authorization Act, Congress amended the Clean Water Act to provide the Department of Defense and the Environmental Protection Agency authority to jointly establish standards for incidental discharges from Armed Forces' vessels. The uniform national standards would apply to discharges from vessels of the Navy, Military Sealift Command, Army, Marine Corps, Air Force, and Coast Guard to the navigable waters and contiguous zone of the U.S. and its territories. Uniform National Discharge Standards (UNDS) will require control of discharges, by either a technology or management practice. UNDS will facilitate the Armed Forces' ability to better design and build future vessels to be environmentally sound and to maintain the operational flexibility of Armed Forces' vessels both domestically and internationally. The development of standards for Armed Forces' vessel discharges may have greater impact on naval engineering requirements for future vessels than any other single environmental issue, These standards are expected to stimulate the development of innovative vessel pollution control technologies, which on be used for both Armed Forces' vessels and commercial shipping vessels. This paper provides an overview of UNDS development, summarizes the results of UNDS Phase I, provides a summary overview of the preliminary approach for accomplishing UNDS Phase Il, and discusses implications for future naval engineering efforts.

关键词： Replenishment at sea homeland defense shipbuilding Military Personnel Uniform home range Treated water naval engineering Uniforms Implication Clean Water Act Coastguards

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Arsenal ship program certification plan

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naval ENGINEERS JOURNAL 1998年第1期110卷 249-261页

作者： Arntson, S Lind, W Turner, JJ Blaiklock, WC Tedesco, M Stephen G. Arntson is an independent consultant. A degree Naval Architect he has over 38 years of experience in the design construction and maintenance of surface ships. His experience includes 28 yeus with the Naval Sea Systems Command Naval Ship Engineering Centerl Bureau of Ships specializing in the structural design of Naval surface ships and 7 years with ABS Specializing in the application of commercial ship design practices. Most recently he worked with both NASSCO and ABS MZ the Arsenal Ship Program. Steve was very active with the Ships Structure Committee in developing R&D programs for ship structure and he is a member of the ASNE Journal Committee. Steve received a BS in Mechanical Engineering (Naval Architecture Option) from Virginia Polytechnic Institute in 1964. He is a member of the ASNE TAU BETA PI PI TAU SIGMA and PHI KAPPA PHI. William 1. Lind joined ABS in 1992 after ten years with Sparkman and Stephens Inc. He is currently ABS Amekas Manager of Engineering jm New Orleans and Cleveland. Both ofices conduct plan reviews for militavy commercial and private marine craft fm self-propelled vessels under 300 feet in length and bargus unlimited in length. As Vice-Chaimn ojthe Western Rivers Technical Committee Great Lakes Technical Committee and the Small Vessel Committee Bill participated in the writing of the 1997 ABS Guide for Building and Classing High Speed Craft and the 1997 ABS Rules for Building and Classing Steel Vessels Under 9OM. Bill received an MBA from Florida Atlantic University in 1995 a BS in Mechanical Engineering from New York Institute of Technology in 1986 and a BA in Histoy from Colgate University in 1976. He is Chaimn of SNAME HS-9 Composite Panel Testing & Fire Protection and a member of ASNE. John J. Turner is Senior Vice President of SYNTEK Technologies Inc. in Arlington Virginia. SYNTEK specializes in activities of a highly technical nature supporting both industry and government in domestic and international markets. He is a registered Professional Engineer

The Defense Advanced Research Project Agency (DARPA), in conjunction with the U.S. Navy, initiated a research program for the design and construction of a distinctive warship for the 21st century known as the Arsenal Ship. By using an innovative development and acquisition approach it was hoped to streamline the procurement process and reduce costs. In an environment where budgets are being cut, both industry and Government were challenged to develop, design, and produce the innovative ship and related mission systems to meet specific performance capabilities within strict affordability constraints. A key element of this innovative acquisition approach was a new certification scheme designed to replace the traditional test and evaluation (T&E) and acceptance process. The purpose of this paper is to describe the development of the certification plan during Phase LI of the Arsenal Ship program by the American Bureau of Shipping and the contending Shipyard teams, and to discuss the potential benefits of this alternative certification approach. Although the Arsenal Ship program was canceled late in 1997, insight derived from the exploration of new certification concepts could benefit future design and building programs.

关键词： Warships

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Application of 3-D nonlinear wave-load and structural-response simulations in naval ship design

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naval ENGINEERS JOURNAL 1997年第3期109卷 253-266页

作者： Engle, A Lin, W Salvesen, N Shin, Y Allen H. Engle:is a naval architect in the Hydrodynamic Division of the Naval Sea Systems /Command (NavSea). He received his B.S. degree in engineering scinece from the State University of New York at Buffalo in 1977 and his M.S. degree in ocean engineering from the Unviersity of Hawaii in 1979. Corrently Mr. Engle is the program director of the Navy's Hydrodynamic Loads Technology Development Program. Mr. Engle is Chairman of SNAME Panel on Hull Loadings (HS-1) and contributing member to the International Ship and Offshore Structures Congress's Committee on Dynamics. Moei-Min Lin:is a senior research scientist at the Ship technology Division of Sciences Applications International Corporation (SAIC). He received his B.S. degree in naval architecture and marine engineering from the National Cheng-Kung University Taiwan in 1977 and his Ph.D. degree in ocean engineering from MIT in 1985. He is an expert in computational ship hydrodynamics. He has been the P.I. for development of the Large Amplitude Motions Program (LAMP) system. Nils Salvesen:is the manager of the Ship Technology Division of the Science Application International Corporation (SAIC).He received his B.S. and Ph.D. degree from the Development Naval Architecture and Marine Engineering of the University of Michigan in 1960 and 1966 respectively. He has more then thirty years of experience in the development of ship motion simulation and wave load prediction methods. More than twenty-five years ago he developed the original strip-theory code on which the Navy's ship motions program (SMP) is based. Yung-Sup Shin:is the principal engineer responsible for the hydrodynamic projects in the Research and Development Department of the American Bureau of Shipping New York. He received a Ph.D. degree in hydrodynamic from the Department of Naval Architecture and Marine Engineering of the University of Michigan. In the past eighteen years at ABS he has been involved in the theortical development and analysis of various marine hydrodynamic problems. In recent year

Despite the limits inherent within linearized frequency-domain ship motion and wave load computer codes, strip theory has been found to provide the design community with a fairly robust, practical design tool with reasonable accuracy for most conventional displacement monohulls. However, the advent of new design concepts including multi-hulls and application of new materials as well as the push to incorporate reliability methods within surface ship structural design criteria has highlighted the need for more rigorous methods of developing a lifetime load spectrum. In this paper, a multilevel computation system for predicting ship motions and wave loads, up through and including extreme sea conditions, is presented. This system includes a traditional strip theory approach and newly developed linear and nonlinear three-dimensional time-domain methods. The new nonlinear methods are currently in the process of being validated by the U.S. Navy. The status of the current development is presented. Sample numerical results from the new nonlinear methods are compared with both linear frequency domain predictions and model tests.

关键词： naval vessels

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Hydroelastic considerations in ship panel design

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naval ENGINEERS JOURNAL 1997年第5期109卷 61-66页

作者： McCormick, ME Bhattacharyya, R Mouring, SE Dr. Michael E. McCormick:is a research professor of civil engineering at The Johns Hopkins University. Before joining the Hopkins faculty in 1994 he was a professor of ocean engineering for twenty-five years at the U.S. Naval Academy. In addition he has held full-time faculty positions at Swarthmore College Trinity College (Hartford) and the Catholic University of America. He was also a hydrodynamicist at the David Taylor Model Basin for more than four years. Prof. McCormick received his undergraduate degree in mathematics and physics from AmericanUniversity a masters degree in applied mechanics and a Ph.D. in mechanical engineering from Catholic University a Ph.D. in civil engineering and a Sc.D. in engineering science from Trinity College in Dublin Ireland. He has over 100 publications including two books in the areas of ocean engineering wave mechanics and ocean wave energy conversion. He has also edited two books dealing with ocean engineering. In addition he is co-editor of both the journal Ocean Engineering and the Elsevier book series in ocean engineering. Dr. Rameswar Bhattacharyya:is professor of naval architecture at the U.S. Naval Academy where he has served for twenty-six years and adjunct professor of mechanical engineering at The Johns Hopkins University. Prior to joining the Naval Academy faculty he was a faculty member in the Department of Naval Architecture and Marine Engineering at the University of Michigan. His research experience includes ten years at both the Lubecker Flender-Werke and the Hamburg Ship Model Basin in Germany. His research has led to numerous publications including two books one in the area of ship dynamics and the other in the area of computer-aided ship design. Prof. Bhattacharyya received his undergraduate degree in naval architecture from the Indian Institute of Technology and his doctorate in engineering from the Technical University of Hanover Germany. In addition he holds an honorary doctorate from the University of Veracruz. With Prof. McCormick he co

Panels and all other structural components of surface ships and submarines vibrate when the vessel is underway. The vibratory motions are primarily excited by the power plant. At operational (design) speeds, panels vibrate in their fundamental modes and those associated with their higher harmonic frequencies. The panel motions have rather well-defined energy spectra, which depend on both the structural design, position of the panel and the rotational speed of the single or multiple power plants. The panel motions will interact with the vortices in the adjacent turbulent boundary layer. The interaction can result in either an increase in the frictional drag or a decrease. Because of this, the argument is made that the designs of the panels and their support systems should include considerations of this hydroelastic effect.

关键词： naval architecture

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Developing a prototype concurrent design tool for composite topside structures

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naval ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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Joint Logistics Over The Shore operations in rough seas

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naval ENGINEERS JOURNAL 1997年第3期109卷 385-393页

作者： Vaughters, TG Mardiros, MF Theodore G. Vaughters:has more than thirty years of engineering and program management experience in the development and testing of material handing hardware systems to transfer cargo from ship-to-shore from ship-to-ship and within both Navy and commercial ships. From 1967 to 1977 he was a supervisory naval architect at Hunters Point Naval Shipyard and Mare Island Naval Shipyard. In 1977 he joined his present organization and became office head in 1987. He has received numberous awards including the Meritorious Civilian Service Award for the management of a program which development a Ro/Ro ship offshore unloading facility. His department is currently engaged in a number of RDT&E logistics program which include environmental ligistics Navy logistics modeling and simulation mobile offshore bases sea based logistics strategic sealift joint service ligistics over the shore systems underway replenishment and shipboard cargo handling systems. Martin F. Mardiros:has been working on JLOTS related systems for eight years as a engineer at the Naval Surface Warfare Center Carderock Division. He has a B.S.E. degree in naval architecture from the University of Michigan He has participated in numberous JLOTS and JLOTS related exercises since 1988. Mr Mardiros has fielded a evaluation of full scale prototype sea state 3 JLOTS systems for evaluation and demonstration such as the Air Cushion Vehicle Landing Platform (ACVLAP) improved mooring and fendering systems for causeway ferries and motion mitigation sytems for the Roll-On/Roll-Off Discharge Facility. Mr. Mardiros recently headed up the JLOTS Sea State 3 Option Study which is being used by the Navy and Army to develop their JLOTS master plan.

Joint Logistics Over the Shore (JLOTS) operations involve the unloading of ships without the benefit of fixed port facilities. Container ships, roll-on/roll-off (Ro/Ro) ships, break bulk ships, heavy lift ships, and tankers are the most common merchant vessels utilized in JLOTS operations to transport military cargo. A major problem is that the current JLOTS system is inoperative in sea state 3 and greater conditions. When seas build above sea state 3 the motion and relative motion of lighters and ships create extremely dangerous conditions which preclude the movement of cargo. New technology is currently being developed by the Navy, Army and the Defense Advanced Research Projects Agency (DARPA) to improve JLOTS operations. Several new JLOTS subsystems were recently tested as part of an Office of the Secretary of Defense (OSD) sponsored joint services test and evaluation program called JLOTS III (June 1993). JLOTS III showed that lighters, cargo transfer systems, and personnel do not have the capability or training to perform in sea state 3, as currently required by military doctrine. Subsequent to the JLOTS III testing, a number of R&D innovations have been examined and a Heavy Weather (Sea State 3) JLOTS Options Study has been completed. This options study has defined and characterized all the weak links related to heavy weather operations and has identified and/or developed concepts to improve the overall JLOTS operational efficiency. This paper discusses current JLOTS technology development initiatives from a joint services perspective with regard to the following question: Can emerging technology, in combination with improved training and command and control, provide a heavy weather JLOTS capability which is affordable?

关键词： naval warfare

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How much stealth?

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naval ENGINEERS JOURNAL 1996年第3期108卷 105-115页

作者： Goddard, CH Kirkpatrick, DG Rainey, PG Ball, JE [?]Cdr. Charles H. Goddard USN is an Engineering Duty Officer assigned to the New Construction Office at the Supervisor of Shipbuilding in San Diego California. He has had multiple tours in ship design and acquisition including his last assignment as a project officer in the Ship Signatures Group at the Naval Sea Systems Command. Cdr. Goddard qualified in surface warfare and is a member of the acquisition professional community. He is a 1978 distinguished graduate of the U.S. Naval Academy and earned the professional degree of Ocean Engineer and a Master of Science in Naval Architecture and Marine Engineering from MIT. He is an active member of the American Society of Naval Engineers having recently served as chairman of the Combat Systems Committee.

Stealth has changed the way we fight, and has become a key performance parameter of many of our premier weapon systems. This paper addresses the importance of stealth for the next generation surface combatant. Stealth is first defined and the fundamentals presented. Its effects on the enemy's kill chain are discussed. Examples are presented to show how stealth can fundamentally change ship survivability and improve mission effectiveness. Arguments against stealth are addressed including the need to radiate active sensors, cost and perishability. Assertion is made that the issue for the next surface combatant is not whether to incorporate stealth, but rather how much?

关键词： Warships

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