检索结果-内蒙古大学图书馆

NEW TECHNOLOGY IN OIL CONTENT MONITORS

NAVAL ENGINEERS JOURNAL 1989年第2期101卷 48-55页

作者： NARDELLA, JA RAW, TT STOKES, GH John A. Nardella is the life-cycle manager for oil content monitor equipment for the Naval Sea Systems Command Washington D.C. He has an M.S. degree in chemical engineering from the Pennsylvania State University and is a licensed professional engineer in the Commonwealth of Virginia. Dr. Timothy T. Raw is the principal investigator responsible for the oil contamination monitor project. He has a doctorate in physical chemistry from Rensselear Polytechnical Institute and a B.A. in chemistry and computer science from Saint Louis University. Dr. Raw is currently a staff member at Anheuser Busch Inc. in Saint Louis. Dr. Grant H. Stokes is responsible for the technical management of Geo-Centers Inc. Boston operation. He has doctorate and M. S. degrees in physics from Princeton University and a B.A. from Colorado College. Previous to joining Geo-Centers Inc. he was a staff member in the Laser Fusion Program at Los Alamos National Laboratory.

International antipollution requirements have been legislated to regulate the oil content of bilge effluent from ships. In response to these standards, the U.S. Navy is currently in the process of installing pollution abatement equipment on all vessels. The equipment will consist of an oil-water separator in the bilge discharge line, followed by an oil content monitor which makes the final decision on whether or not the water is clean enough to be pumped overboard. The monitor is required to make a real-time measurement of oil concentration in the range 15 ± 5 to 100 ± 20 ppm for flow rates up to 50 gal/min. and possibly in the presence of interfering contaminants, such as rust. This paper presents the results of the current effort to develop a monitor which satisfies all of these requirements and is sufficiently rugged for fleet deployment. The monitor under development employs two fiber optic systems and a small microprocessor. The first optical system measures the concentration of particles in the flow as a function of their sizes, using small angle forward scattering. The second determines what percentage of the particles in the flow are oil, using large angle scattering. The microprocessor takes the data from the two optical systems and calculates the oil concentration in the flow. Since the particle size is measured by the monitor, no sample preparation is required and the monitor may be placed directly in the discharge line where it responds to changes in oil content in less than one second. In addition, this monitor can notify the operator of impending oil-water separator failure associated with passing large oil particles. A demonstration monitor consisting of the forward scattering unit has been successfully tested at the NavSea oil pollution abatement test facility at the Naval Ship systems engineering Station at Philadelphia. The monitor agrees well with chemical means of measuring oil content. Results of this comparison and laboratory test of a prototyp

关键词： Water Pollution

来源：评论

学校读者我要写书评

暂无评论

ADISSA - ARCHITECTURAL DESIGN OF INFORMATION-systems BASED ON STRUCTURED ANALYSIS

引用

INFORMATION systems 1988年第2期13卷 193-210页

作者： SHOVAL, P Computer and Information Systems Program Department of Industrial Engineering and Management Ben-Gurion University of the Negev P.O. Box 653 Beer Sheva 84105 Israel

ADISSA is a methodology for Architectural Design of Information systems and Software, based on Structured Analysis. The architectural design includes: 1. (a) design of a tree-structured menu system, which interfaces between the users and the system—viewed as the “external architecture” of the system; and 2. (b) design of the transactions of the system, composed of various functions which are activated in response to user needs and various events in the universe of discourse—viewed as the “internal architecture” of the system. The menu tree and the transactions are tied up with the other major components of the system architecture: the inputs and outputs, and the database. ADISSA methodology is fully compatible and consistent with Structured Analysis, and therefore the stages of system analysis and design are integrated into one complete process.

关键词： Architectural design data flow diagram development methods software engineering structured analysis and design transactions user interface

来源：评论

学校读者我要写书评

暂无评论

A SURFACE NAVY VIBRATION program OVERVIEW - STANDARDIZATION AND STATE-OF-THE-ART

引用

NAVAL ENGINEERS JOURNAL 1988年第3期100卷 90-100页

作者： MARSHALL, BR The author is the material condition assessment (MCA) program manager at the Naval Ship Systems Engineering Station (NA VSSES). He received his BSEE from Drexel University in 1972 and worked for ten years in the vibration measurement and analysis field. His current position was established in 1982 to fill a NAVSSES need to provide coordinated support to NavSea and other Navy customers in the area of performance-based maintenance including the application of diagnostic techniques management of in-house MCA projects and interfacing with other government and private activities. His responsibilities include managing NAVSSES‘ efforts in the Systems and Equipment Maintenance Monitoring for Surface Ships (SEMMSS) Program and the CG-47 Class MCA Program presently being merged with SEMMSS. He is a member of the American Society of Naval Engineers and the Vibration Institute.

Ever scarcer maintenance dollars have resulted in changes to conventional maintenance strategies, notably extension of operating cycles and implementation of phased maintenance concepts. This trend has brought with it a need to accurately predict and define machinery repairs based on knowledge of system and component performance. In such an environment, Navy engineers (as well as those in the private sector) have increasingly turned to vibration analysis for condition assessment and diagnosis of wear-related degradation. In recent years, the surface Navy has acted to consolidate and coordinate the many separate and sometimes redundant efforts that have proliferated in the past by establishing a central NavSea office with responsibility for all diagnostics, including vibration analysis, and by appointing a technical agent to provide engineering support in this area. This paper presents a synopsis of the various surface Navy programs (the machinery vibration analysis [MVA] programs of the four surface ship repair planning agents, the ship's force programs under fleet sponsorship, and the vibration portion of a surface combatant monitoring program), delineates standardization accomplishments to date, and focuses on the issuance of a technical specification which regulates all aspects of instrumentation, data acquisition, and analysis. Details presented include the relationship of the latter two initiatives, and the establishment of a Navy owned and operated data base presently being implemented, with emphasis on the application of digital technology and telecommunications.

关键词： NAVAL VESSELS

来源：评论

学校读者我要写书评

暂无评论

A COMPUTER-MODEL FOR DAMAGE TOLERANCE ANALYSIS

引用

NAVAL ENGINEERS JOURNAL 1988年第5期100卷 59-68页

作者： FAIRHEAD, DL COHEN, SL Steven L. Cohen:heads the Survivability and Damage Control Office at the David Taylor Research Center. His career has addressed a wide range of technical and management responsibilities in the areas of HM&E systems design magnetic signatures system safety of surface ships and submarines shipboard energy conservation RDT&E (future fleet) life cycle costing survivability damage control CBR defense and management information systems. He has participated in all phases of the ship design process from conceptual design through ship construction operational evaluation and overhaul/modernization. Mr. Cohen is a graduate of Drexel University where he majored in electrical engineering and has more recently taken courses in the fields of systems engineering program management costing and microcomputer-based information and decision support systems.

A computer model is being developed by the David Taylor Research Center (DTRC) to analyze the tolerance of surface ship combat systems to combat-induced and self-inflicted damage. The work is being done in support of the Navy's hull, mechanical and electrical design effort to improve the survivability of surface ship combat systems. The DDG-51 Detailed Design Specifications (Section 072f) and the General Specifications for Ships of the U.S. Navy (1986 Section 072e) both require that damage tolerance analyses be performed. A damage tolerance analysis shows the effect of damage on vital auxiliary and electrical systems and relates these damage effects to the capability of the ship to continue performing its combat mission at a prescribed level. Designated the Computer Aided Design of Survivable Distributed systems (CADSDiS) model, DTRC's deterministic analytical tool consists of portable software to be used by personnel at the activity responsible for the ship design. The model's graphics electrical module is now operating on Digital Equipment Corporation VAX computers at several Navy and commercial activities. Because CADSDiS is highly interactive, it becomes an integral part of the design cycle; this is its major benefit. Thus, damage tolerance analysis information is available to personnel designing the ship within hours or days rather than weeks or months. This computer model will help ensure that the survivability principles of separation and redundancy are incorporated into ship design and are realized in the ship as built.

关键词： Warships

来源：评论

学校读者我要写书评

暂无评论

DATA MULTIPLEX SYSTEM (DMS) - ASPECTS OF FLEET INTRODUCTION

引用

NAVAL ENGINEERS JOURNAL 1988年第6期100卷 41-47页

作者： BLACKWELL, LM Luther M. Blackwell:is presently the Data Multiplex System (DMS) program manager in the Bridge Control Monitoring and Information Transfer Branch of the Naval Sea Systems Command (NavSea). He graduated from the University of Maryland in 1964 receiving his BS degree in electrical engineering. After graduating he was employed in the Bureau of Ships where he held project engineering assignments on various ships entertainment magnetic tape recording fiber optics computer mass memory and information transfer systems. He has also pursued graduate studies in engineering management at The George Washington University.

The Data Multiplex System (DMS) is a general-purpose information transfer system directed toward fulfilling the internal data intercommunication requirements of a variety of naval combatant ships and submarines in the 1990–2000 time frame. The need for a modern data transfer system of the size and capability of DMS has increased as various digital control systems throughout naval ships have adopted distributed processing architectures and reconfigurable control consoles, and as the quantity of remotely sensed and controlled equipment throughout the ship has increased manyfold over what it was in past designs. Instead of miles of unique cabling that must be specifically designed for each ship, DMS will meet information transfer needs with general-purpose multiplex cable that will be installed according to a standard plan that does not vary with changes to the ship's electronics suite. Perhaps the greatest impact of DMS will be the decoupling of ship subsystems from each other and from the ship. Standard multiplex interfaces will avoid the cost and delay of modifying subsystems to make them compatible. The ability to wire a new ship according to a standard multiplex cable plan, long before the ship subsystems are fully defined, will free both the ship and the subsystems to develop at their own pace, will allow compression of the development schedules, and will provide ships with more advanced subsystems. This paper describes the DMS system as it is currently being introduced into the fleet by the U.S. Navy. The results of its design and implementation in the DDG-51 and LHD-1 class ships are also presented.

关键词： Multiplexing Equipment

来源：评论

学校读者我要写书评

暂无评论

OUT-OF-PRODUCTION MICRO-ELECTRONICS - AN ACHILLES HEEL OF DEFENSE systems

引用

NAVAL ENGINEERS JOURNAL 1988年第5期100卷 69-72页

作者： MACKENZIE, CM WOOTTEN, R HOY, K NEELY, J KOSCO, D SMITH, W C. Malcolm Mackenzie:is the Materials and Parts Availability Control program manager at U.S. Army Laboratory Command Adelphi Md. Mr. Mackenzie has a B.S. degree in mechanical engineering from Northwestern University an M.S. degree in the same field from the University of Michigan and an M.B.A. from East Texas State University. Richard Wootten:is project officer of the U.S. Army Material Command's Materials and Parts Availability Control Information Data System Project Adelphi Md. Mr. Wootten holds an associate's degree in mechanical engineering from Northern Virginia Community College and a Bachelor of Science in Electronics Engineering from The University of Alabama. Kevin Hoy:is manager of the Microelectronics Obsolescence Management Program at the Naval Avionics Center Indianapolis. Mr. Hoy holds both bachelor and master of science degrees in mathematics from Purdue University. James Neely:is leader of the Materials Management Team Industrial Materials Division in the Directorate of Manufacturing Air Force Systems Command Dayton Ohio. Mr. Neely holds a bachelor's degree in political science from The University of Georgia and a master of science degree in public administration from The University of Missouri. Don Kosco:is an electronics engineer currently involved with introducing new technologies into weapons systems. He is in the Directorate of Reliability Maintainability and Technology Policy HQ Air Force Logistics Command Dayton Ohio. Mr. Kosco holds a bachelor of engineering degree from Widener University a master's in systems engineering from The Air Force Institute of Technology and an MBA from the University of Texas at San Antonio. William Smith:is head of the Plans Branch in the Office of Policy and Plans Defense Electronics Supply Center (DESC) Dayton Ohio. He was for many years manager ofDESC's Diminishing Manufacturing Sources (DMS) Program. Mr. Smith holds a bachelor of arts degree in political science from Indiana University.

Both the timely manufacture of defense systems and their subsequent on-line operability depend upon the availability of component parts. The growing problem of microelectronic component nonavailability is casting a shadow over logistics support to these systems. This paper will discuss the causes of the problem and provide some examples of cases confronted by the DoD logistics community. It will also identify some actions which have been taken in the past to manage the issue as well as initiatives now underway. Finally it will look at what lies ahead.

关键词： Microelectronics

来源：评论

学校读者我要写书评

暂无评论

COST MINIMIZATION DURING 2ND SOURCING

引用

NAVAL ENGINEERS JOURNAL 1988年第1期100卷 36-44页

作者： GWOZDZ, F Has over 17 years of experience working in defense and non-defense industries. He is presently a project manager with INFOrmed TECHnology an engineering consulting firm located in Lanham Maryland. His responsibilities include cost analysis and modeling economic and financial studies of weapons systems and special projects. Previously Mr. Gwozdz held a corporate position with Kennametal Defense Products where he developed and implemented a turn-key manufacturing plant improved and modified manufacturing processes analyzed production operations and resolved cost and productivity problems. As the plant engineer for a Union Carbide facility he personally developed a cost savings program generating $500000 per year. With Booz-Allen & Hamilton he developed government positions on labor cost for two shipyard claims totaling over $2 billion. Mr. Gwozdz has a B.S. in aeronautical engineering and management engineering from Rensselaer Polytechnic Institute and an M.B.A. from the University of New Haven.

This study attempts to develop strategies to minimize the negative cost impacts associated with selecting and awarding second source contracts. A number of factors are presented that may impact costs when second sources are used. Eight methods for determining sizes of prime and second source competitive award splits are reviewed. The analysis also includes an historical and economic overview. Economic market conditions are reviewed and applied to second sourcing. Finally, conclusions are formulated about minimizing costs, countering economic market conditions, and contractor gaming.

关键词： MILITARY engineering

来源：评论

学校读者我要写书评

暂无评论

SIMPLIFICATION OF GAS-TURBINE INTAKE ANTI-ICE systems

引用

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

来源：评论

学校读者我要写书评

暂无评论

IMPROVED LOGISTICS SUPPORT THROUGH STANDARDIZATION

引用

NAVAL ENGINEERS JOURNAL 1988年第2期100卷 40-46页

作者： KINNEY, ET CONSTANT, AE Edward T. Kinney:is presently director of the Machinery Group Naval Sea Systems Command (NavSea). He graduated from Michigan State University in 1952 and joined the Bureau of Ships Engineer-In-Training Program. Mr. Kinney has held a variety of technical and senior management positions in NavSea and the Naval Material Command. He has authored a number of technical articles and papers and has been a contributing author to the Naval Engineers Journal. He is a past president of the Association of Scientists and Engineers and holds membership in ASNE SNAME Federal Conference of Environmental Engineers and ASME and is chairman of the ASME Shipbuilding Standards Machinery Committee. Alexander E. Constant:is a native of Newport Rhode Island and a graduate of Pennsylvania Military College from which he received his BS degree in civil engineering in 1960. After two years with the U.S. Forest Service working in civil sanitary engineering designing recreational facilities he joined the Vermont Water Resources Department as a project engineer. He was recruited by the Navy in 1966 and he accepted a position in the Piping Systems Branch where he attained the position of director. At present he is head of the Auxiliary Equipment Division Naval Sea Systems Command where for the past six years he has been responsible for the design operation maintenance and life cycle support for the majority of the U.S. Navy's shipboard auxiliary equipment. He has been a member of U.S. and international committees on standardization and has been a delegate representing the U.S. at several meetings throughout the world.

This paper presents improvements in logistics support of hull, mechanical, and electrical (HM&E) components through standardization to the piece part level. The process of component standardization is outlined and compared with traditional HM&E acquisition approaches. The impact of standardization on logistics support is presented with case examples cited to graphically demonstrate how logistics improvements are derived. The paper also presents standardization costs and benefit analyses. A compelling case for increased HM&E standardization efforts is made from a logistics improvement perspective.

关键词： NAVAL VESSELS

来源：评论

学校读者我要写书评

暂无评论

NAVAL SHIP DESIGN - EVOLUTION OR REVOLUTION

引用

NAVAL ENGINEERS JOURNAL 1988年第3期100卷 40-52页

作者： TIBBITTS, BF KEANE, RG RIGGINS, RJ Captain Barry Tibbitts USN: was graduated from the U.S. Naval Academy in 1956 and subsequently served as a gunnery division officer in an attack aircraft carrier and as gunnery officer operations officer and chief engineer in two diesel submarines. He attended MIT from 1962–1965 earning a master of science in mechanical engineering and a naval engineers degree. Early assignments as an engineering duty officer included SRF Yokosuka CINCPACFLT staff and SupShip Pascagoula. From 1976 to 1987 he served in a variety of senior ship design assignments: CVV ship design manager director NAVSEC Hull and Ship Design Divisions director NavSea Ship Design Management and Integration Office commander David Taylor Naval Ship R&D Center and director NavSea Ship Design Group. Recently retired but recalled to active duty he is the professor of naval construction and engineering at MIT. He has received seven personal decorations including two Legion of Merit awards. Robert G. Keane Jr.:is currently the deputy director of the NavSea Ship Design Group. He has been employed by NavSea and its predecessor organizations for over twenty years. He is a graduate of The Johns Hopkins University from which he received his B.E.S. degree in mechanical engineering in 1962. He received his M.E. degree in mechanical engineering in 1967 from Stevens Institute of Technology and in 1970 his M.S.E. degree in naval architecture and marine engineering from the University of Michigan. Mr. Keane held increasingly responsible design positions involving ship arrangements hull equipment hull form and hydrodynamic performance before being selected in 1981 for the Senior Executive Service to be director of the Naval Architecture Subgroup. Following an assignment at the David Taylor Research Center as assistant for transition of ship engineering technology he served as director of the Ship Survivability Subgroup until assuming his current position in 1985. He is an active member of ASNE SNAME and ASE. Robert Riggins:received a B.S. in mechanical

Some fairly radical changes to the naval ship design process occurred during the 1970s. The decade of the 80s has also witnessed a steady stream of changes. One of the most significant was the establishment of the Ship Characteristics Improvement Board (SCIB) in the Office of the Chief of Naval Operations (OpNav), and the resulting influence on the dialog between the military requirements decision makers and the Navy's ship designers. Other changes have occurred for which the impacts are less clear. These include establishment of the chief engineer of the Navy (ChEng) position, creation of the Space and Naval Warfare systems Command (SpaWar) and OpNav's “Revolution at Sea” initiative. This paper will describe and discuss these and other changes, and comment on the resultant impact. The authors will attempt to present a global view of the total pattern of changes and try to discern if we are on a path of revolution, or merely normal evolution.

关键词： NAVAL VESSELS

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：