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STRUCTURAL-ANALYSIS METHODS FOR LIGHTWEIGHT METALLIC CORRUGATED CORE SANDWICH PANELS SUBJECTED TO BLAST LOADS

NAVAL ENGINEERS JOURNAL 1991年第4期103卷 134-136页

作者： WIERNICKI, CJ LIEM, F WOODS, GD FURIO, A WHIDDON, WD SMITH, MA PACKARD, WT Christopher J. Wiernickiis the director of the Structures and Materials Division of Designers and Planners Inc. He has over 10 years of experience in marine structural design and advanced material product development. He received a B.S. degree in civil engineering from Vanderbilt University and M.S. degrees from both George Washington University and Massachusetts Institute of Technology. He is a registered professional engineer and is a member of ASNE SNAME and SAMPE. Franz Liemis a senior structural engineer of ASTECH. He has over 18 years of experience in structural engineering. He received M.S. degrees in civil/structural engineering from Carollo Wilhelmina University in West Germany. He is a registered professional engineer. Gregory D. Woodsis the Naval Sea Systems Command's lightweight metallic structures program manager. Until recently a naval architect in the Structural Integrity Application Division he currently works in the Amphibious Auxiliary and Support Ship Branch. He received a B.S. degree in mechanical engineering from Tennessee State University with additional graduate level course work at the NavSea Institute. Anthony J. Furiois the program manager for lightweight metallic structures in the Ship Structure Division of the David Taylor Research Center. He has over 19 years of experience in ship structure research and light weight metallic development for U.S. Navy fleet applications. He received a B.S. in civil engineering from Long Island University and a M.S. in ocean engineering from Stevens Institute of Technology.

Since the early 1980s, the U.S. Navy, in conjunction with industry, has continued to develop and test innovative lightweight structural concepts with the purpose of seeking alternative replacements for conventional plate beam metallic structures. One commercially available concept currently under investigation is lightweight metallic corrugated core sandwich panels. This paper presents both elastic and plastic design methods for lightweight metallic corrugated core sandwich panels subjected to air blast loading. The equations presented in this paper, while not a complete solution to the complicated dynamic, elastic plastic phenomena of blast wave-rigid body interaction, are offered as a set of relatively simple analytical expressions that can be used in preliminary design. Because of the closed form nature of the equations the designer has the capability to quickly identify the most important parameters effecting the response of lightweight metallic corrugated core sandwich panels to air blast loads.

关键词： Shipbuilding Materials

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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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Navy's chlorofluorocarbon/Halon program

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Naval Engineers Journal 1991年第3期103卷 107-117页

作者： Krinsky, Joel L. Noel, William Joel L. Krinskyholds a B.S. degree from the U.S. Merchant Marine Academy (1960) and an M.B.A. from the American University (1966). He is currently the director of The HVAC Submarine Life Support Division within NavSea. He formerly served as the deputy director of the Auxiliaries Division and head of the Air Compressor/Forced Draft Blowers and Valves and Piping Branches within the Auxiliaries Division. He has thirty years experience in the marine engineering and computer fields. He sailed for two years in the merchant marine and then began his career in the Bureau of Ships in 1962 as a project engineer in the Boiler and Heat Exchanger Branch. Mr. Krinsky then served as the systems acquisition manager for navigation systems on attack submarines and aircraft carriers. Mr. Krinsky entered private industry with IBM in 1967 spent eight years in the computer industry serving in various capacities and returned to NavSea in 1975. He served in the U.S. Navy Reserve from 1961 to 1967 and is a member of ASE ASNE and ASTM. Mr. Krinsky currently chairs the ASTM subcommittee for shipboard HVAC (F25.11.07) and is writing the heating ventilation air conditioning and refrigeration chapter of the revised SNAME text on Marine Engineering. William Noelgraduated from Drexel University in 1984 with a B.S. degree in mechanical engineering. He worked at the Naval Ship Systems Engineering Station in Philadelphia in the Air Compressor Branch where he directed improvements to compressed air ship silencing systems. In 1985 he was hired at the Naval Sea Systems Command and spent two years working in the Auxiliary Machinery Division where he was life cycle manager for various air compressors and compressed air system components. In 1989 he earned an M.S. degree in mechanical engineering from the University of Maryland specializing in multi-phase fluid flow and heat transfer phenomena. Since 1987 Mr. Noel has been the project engineer charged with developing replacement refrigerants and fire fighting agents in executing the Navy CFC/

The Naval Sea systems Command is executing a three-phase program to ensure compliance with national regulations, DoD policy, and Navy instructions mandating the phase-out of CFC and Halon use by the Navy. The Navy uses significant quantities of CFCs and Halon as solvents, refrigerants, and fire-fighting agents both in military operations and through specifications and contracts for weapons and support equipment. Phase one of the program plan will be to conserve chemicals through reclaiming and recycling, and by establishing and maintaining a chemical inventory of CFCs and Halons. Phase two will research, develop, and test substitute chemicals and alternative technologies for existing CFC uses. This research will be pursued through Navy and government laboratories, cooperation with chemical and equipment manufacturers, and by participation in government/industry consortiums. Finally, phase three will deploy the replacement chemicals and new technologies into the fleet, and institutionalize the conservation measures developed in phase one. This paper discusses in detail the three phases of the Navy program, and relates the Navy effort to DoD policy, the Montreal Protocol, and Congressional legislation. Unique Navy concerns, research initiatives, and vintaging scenarios for existing equipment are presented.

关键词： Freons

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AN AFFORDABLE APPROACH FOR QUALITY-ASSURED SHIPBOARD MAINTENANCE INFORMATION - REPLY

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NAVAL ENGINEERS JOURNAL 1991年第4期103卷 155-155页

作者： KNACHEL, RE MAGROGAN, WF Robert E. Knachelreceived his B.S. degree in mechanical engineering from Ohio State University in 1959 a B.S. in business administration from the University of Texas in 1963 and his M.B.A. degree from the Harvard Graduate School of Business in 1971. He served as a Navy line and Supply Corps officer for over twenty years. Prior to his retirement he served as the first U.S. Navy Supply Corps program manager for the Saudi Naval Expansion Program. Following retirement in 1981 he managed a series of U.S. Navy and foreign military sales logistics support programs for CACI Inc. Since 1988 he has been employed as a logistics program manager by Systems Engineering Associates (SEACOR) a division of Day and Zimmermann Inc. He currently serves as Washington area operations manager for SEACOR. Mr. Knachel is a member of ASNE and SOLE. William F. Magroganreceived his B.S. degree in economics from the University of Pennsylvania in 1964 an M.B.A. degree from Stanford University in 1972 and his master's degree in American studies from the California State University at Fullerton in 1987. He served on active duty as a U.S. Navy Supply Corps officer from 1964 to 1977 and continues to serve in the Naval Reserves where he has achieved the rank of captain. He has been employed as a financial/logistics analyst and program manager for EG&G Inc. Rockwell International and Unisys Corporation. Mr. Magrogan is currently associated with ELS Inc. as a principal analyst.

Acquisition and logistics professionals recognize the challenges in synchronizing maintenance and supply support information over the life cycle of shipboard systems and equipment. Decisions and judgments made during full-scale development, then described in maintenance documents and allowance lists, may become outdated for any number of reasons once the ship deploys. Thus, the fleet faces the possibility of out-of-sync maintenance support information at virtually any time. Initiatives during the 1980s which reconcile shipboard maintenance and support data include Integrated Logistics Overhauls (ILOs) and Ships Configuration and Logistics Support Information System (SCLSIS). These initiatives aim to ensure all shipboard equipments have current maintenance documents and up-to-date allowance lists, but they are expensive, time consuming, and scheduled every 4 to 5 years. Shipboard officers care about today's problem, particularly the next deployment. ILO and SCLSIS products are not always timed to the next deployment, nor is it practical or cost-effective to do so. Adopting the perspective of shipboard maintenance and supply officers, the authors identify three fundamental maintenance support information needs which quality assure readiness to perform a ship's mission: Technically complete, accurate, and up-to-date maintenance documents for all mission critical equipments. One-to-one correlation between authorized maintenance parts required and authorized allowance/ordering data for mission critical equipments. Assurances that all allowed mission critical parts needed for shipboard maintenance are on board or will be delivered prior to deployment. The authors maintain that the most affordable solution to shipboard maintenance support information quality assurance is to select mission critical equipments with significant CasRep or shipboard “trouble” histories and resolve any maintenance support information discrepancies prior to deployment “real-time.” This approach s

关键词： Ships

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PROCESS-CONTROL IN A FOREIGN ACQUISITION

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NAVAL ENGINEERS JOURNAL 1990年第1期102卷 53-56页

作者： HALPER, ID PRENTICE, GS SELVIDGE, RB Irving D. Halper: attended the City University of New York majoring in mechanical engineering. His career in naval engineering started with various consulting firms prior to his joining the Bureau of Ships in 1963. He is currently the director of the Procurement Appraisal and Logistics Division in the Naval Sea Systems Command's Aircraft Carrier Program Office (PMS 312). George S. Prentice: obtained his B.S. degree in naval architecture from the University of Michigan in 1964. He worked for one and one-half years at Newport News Shipbuilding and Dry Dock before moving to the Naval Sea Systems Command. He is a member of the Society of Naval Architects and Marine Engineers and has written several papers for various organizations and publications. Ronald B. Selvidge: obtained his B.S.M.E. from the University of New Orleans in 1985 at which time he obtained his EIT status. He is an assistant engineering project manager for the Deep Submergence and Ocean Engineering Program Office (PMS 395) of the Naval Sea Systems Command. Professional memberships include the American Society of Mechanical Engineers and the Association of Scientists and Engineers of the Naval Sea Systems Command where he holds the chairmanship of the Legislative Committee.

In 1973, the Boston Naval Shipyard was closed. That shipyard's forge shop was the only source, worldwide, for forged (die-lock) aircraft carrier anchor chain. The Navy determined that a domestic manufacturing facility for large size welded chain was being constructed and decided to develop a specification for a welded carrier anchor chain. Cutbacks in the offshore oil industry stopped construction of that plant and the Navy became dependent on foreign sources. The initial procurement of welded aircraft carrier chain invoked society inspection and certification, and until problems were discovered during shipboard installation, was considered satisfactory. A recheck of the chain, with the certification society's participation, revealed that physical dimensions, breaking strength, and metallurgical properties failed to meet specified values. The next buy of new and replacement chain imposed more stringent QA requirements. It was awarded to the same foreign manufacturer on a competitive bid basis. Because of the prior problems with this vendor, the Navy determined that an on-site inspection team was needed to ensure specification compliance. The experiences of that team are described in this paper. The lessons that were learned relative to the manufacturing process, the lack of communication between QA management and production personnel, and the need for close control over specification enforcement are discussed.

关键词： Chains

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SHIP SERVICE ELECTRICAL systems - DESIGNING FOR SURVIVABILITY

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 32-36页

作者： CERMINARA, J KOTACKA, RO John Cerminara:is a principal engineer with Westinghouse Machinery Technology Division Electrical Systems Department. He holds a B.S. degree in electrical engineering from the University of Pittsburgh. He is a registered professional engineer and a member of IEEE ASNE and the Ship Steering Group of the Combat Survivability Division of ADPA. Mr. Cerminara has had over 30 years of multidiscipline experience ranging from engineering and construction in heavy industry to standards and publications. Past assignments include DOE/ NASA wind turbine project manager for Westinghouse and task leader of MTD electrical systems. Most recent assignments have included hull mechanical and electrical (HM&E) distributive system survivability analyses of the LSD-41 mobility mission area and application and validation of NavSea computer-aided design of Survivable Distributive System (CADSDiS) Program. Rolf O. Kotacka:is presently a ship systems engineer in the Ship Systems Engineering Branch of the Naval Sea Systems Command Engineering Directorate where his primary responsibility is ship system survivability. He is a 1977 graduate of SUNY Maritime College where he received his bachelor of engineering degree in marine electrical engineering as well as a U.S. Coast Guard Third Assistant Engineer License and a commission in the U. S. Naval Reserve. Upon graduation Mr. Kotacka was employed by Charleston Naval Shipyard as a field engineer until 1981 where he gained his background in surface ship HM&E systems and equipment. He then transferred to the Supervisor of Shipbuilding Conversion and Repair Groton where he served as a senior electrical engineer monitoring the design and construction of Trident and 688 class submarines and received the Meritorious Unit Citation. Prior to his present position Mr. Kotacka was the life cycle manager for diesel generator sets in the Naval Sea Systems Command's Generators Branch. He has coauthored several papers dealing with power generation for ASE and SNAME. Mr. Kotacka is also a lieutena

This paper highlights the survivability concerns in the design of ship service power systems. The paper gives a brief description of what constitutes a typical ship service electric power system and concentrates on electric power generation and associated controls. Established survivability design principles and guidelines are highlighted and the application of those guidelines are discussed. General Specifications (Gen Specs) for Ships of the U.S. Navy are cited as the cornerstone for design. Specific design criteria are cited as well as the rationale associated with the survivability design guidelines pertaining to power generation and distribution. The application of these survivability design guidelines plus the use of the deactivation diagram/damage tolerance analysis cited in the Gen Spec section 072e will enhance overall design and help ensure survivable electric power systems for surface combatants.

关键词： Warships

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FLAMMABILITY AND TOXICITY OF COMPOSITE-MATERIALS FOR MARINE VEHICLES

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 45-54页

作者： SEVART, JL GRIFFIN, OH GURDAL, Z WARNER, GA Jeffrey L. Sevart:is a native of Kansas and a 1985 graduate of Kansas State University with a B.S. in mechanical engineering (magna cum laude). After working as a stress analysis engineer at Boeing Military Airplane Company in Wichita Kans. he attended Virginia Polytechnic Institute and State University and received an M.S. in engineering mechanics in February 1988. He currently resides in Akron Ohio working as a research engineer in tire composites research at The Goodyear Tire and Rubber Company. O. Hayden Griffin Jr.:received his B.S. and M.S. in mechanical engineering from Texas Tech University in 1970 and 1971 respectively. He received his Ph.D. in engineering mechanics from Virginia Polytechnic Institute and State University in 1980. Prior to joining the faculty of Virginia Polytechnic Institute and State University as associate professor of engineering science and mechanics in September 1985 he was employed at the U.S. Naval Surface Warfare Center (Dahlgren Virginia) BF Goodrich Tire Group (Akron Ohio) the Bendix Advanced Technology Center (Columbia Maryland) and the Johns Hopkins University Applied Physics Laboratory (Laurel Maryland). He is currently an associate director of the Virginia Institute for Material Systems. He is a registered professional engineer in Virginia and is a member of the American Society of Mechanical Engineers and the American Society for Composites. Zafer Gürdal:received his M.S. in mechanical and aerospace engineering from Illinois Institute of Technology in 1981 and his Ph.D. in aerospace engineering from Virginia Polytechnic Institute and State University in 1985. He worked as a research associate in the Aerospace and Ocean Engineering Department at Virginia Tech before joining the Engineering Science and Mechanics Department as an assistant professor in September 1985. Professor Gürdal's research interests include: composite structures failure mechanics of composites structural optimization and damage tolerant design. He is a member of the American Institute

Characteristics of both thermoplastic and thermoset composite materials as they pertain to marine vehicle applications are discussed. Comparison of various material selection factors such as strength, damage and moisture resistance, and flammability and toxicity as well as cost and availability of thermoset and thermoplastic composite materials are presented. Methods for testing and reducing the flammability and toxicity are discussed. Many commercially available composite systems are reported to provide favorable characteristics for marine applications. Although there seems to be a need for improved production technology for thermoplastics, they present potential advantages in physical properties over thermoset composites.

关键词： Composite Materials

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FIELD METHODS FOR MEASUREMENT OF GROUND-WATER REDOX CHEMICAL-PARAMETERS

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GROUND WATER MONITORING AND REMEDIATION 1990年第4期10卷 81-89页

作者： WALTONDAY, K MACALADY, DL BROOKS, MH TATE, VT Katherine Walton-Day received an A.B. in geology from Smith College (1981) and an M.S. in geology from the Colorado School of Mines (1986). She is currently a Ph.D. candidate in geology at the Colorado School of Mines and is employed as a geologist at the U. S. Geological Survey Geologic Division in Denver Colorado(USGS Box 25046 MS973 Denver CO 80225). Her research involves studying the processes controlling the mobility of trace metals in pristine and contaminated natural systems. Donald L. Macalady received a B.S. in chemical engineering from Pennsylvania State University in 1963 and a Ph.D. in chemistry from the University of Wisconsin in 1969. He has held positions at Grinnell College (1968–1970) Northern Michigan University (1970–1982) and the Colorado School of Mines (1982-present) (Department of Chemistry and Geochemistry Colorado School of Mines Golden CO 80401). His research interests include chemical reactions of anthropogenic organic chemicals in natural water systems chemistry of metals and metal-organic complexes in natural and polluted water systems aqueous analytical chemistry and surface chemistry of natural particles. He is a member of ACS AAAS and ASLO and serves as an associate editor to the Journal of Contaminant Hydrology. Myron H. Brooks received a B.S. in biology from Emory University (1979). He is a graduate student in the Department of Chemistry and Geochemistry at the Colorado School of Mines. Brooks is a research chemist for the U. S. Geological Survey Water Resources Division in Arvada Colorado (USGS Box 25046 MS408 Denver CO 80225). He has participated in numerous investigations of ground water surface water and wet deposition chemistry over the last 10 years. His current research is focused on microbial processes in contaminated ground water. Vernon T. Tate studied mechanical engineering at the University of Denver. He was employed by Union Carbide for 27 years. While employed by Union Carbide he worked as an analyst was in charge of developing a QA/QC lab for

An inexpensive, versatile, and portable system is presented, which facilitates rapid field determinations of redox potentials, pH, conductivity, ferrous and total iron, nitrite, specific conductance, dissolved oxygen, and temperature. Accuracy is facilitated by on-site measurements of most parameters using specially constructed flow-through cells and, for several analyses, sealed reagent ampoules, which can be broken and developed inside a flowing stream of ground water. Coupled with laboratory analyses of more stable ground water parameters, this system can provide accurate and relatively inexpensive determinations of redox conditions in ground water.

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FLEXIBLE AUTOMATED MATERIAL HANDLING-SYSTEM

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JOURNAL OF mechanical WORKING TECHNOLOGY 1989年第C期20卷 433-440页

作者： MAZOUZ, AK HAN, CP Assistant Professors Manufacturing Systems Engineering Program Department of Mechanical Engineering Florida Atlantic University Boca Raton FL 33431 USA

This paper discusses the development of an expert system based on axis orientation of the parts in a three dimensional system. For any part fed to a machine cell, the material handling planning system presents the part to the assembly robot in the desired orientation. Group Technology classification and coding method is used for part identification, as well as for the feeding mechanism design.

关键词： Materials Handling

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THE SURFACE SHIP MAINTENANCE CHALLENGE

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NAVAL ENGINEERS JOURNAL 1989年第3期101卷 73-81页

作者： JACOBS, KS SMITH, BD Kenneth S. Jacobs:is the acting director of the Naval Sea Systems Command's Surface Ship Maintenance Office. Originally trained as a data systems technician he attended Old Dominion University in Norfolk Virginia graduating with a B.S. degree in mechanical engineering in 1975. Over the course of the last 13 years Mr. Jacobs has served in NavSea as a project engineer for boats and service craft the type desk for AFS AOR AO and AOG ship types and as manager of the Amphibious and Auxiliary Ship Maintenance Strategy Program where he was instrumental in the development and implementation of the Phased Maintenance Program. He is a member of Tau Beta Pi. Bertram D. Smith Jr.:is a vice president of American Management Systems Inc. and engineering technical director of its defense business unit. He received his B.S. in engineering from the U.S. Naval Academy in 1957 and his M.S. and naval engineer degrees from the Massachusetts Institute of Technology in 1963. His experience includes shipboard operational engineering shipyard production planning and conversion project management carrier type commander maintenance engineering NavSea program management and private sector engineering management consulting. A member of ASNE since 1961 he is also a member of ASME and SNAME.

Current and projected future reductions in fleet maintenance funding are compelling the issue of ship maintenance requirements to be rethought on many different levels within the Navy. The Surface Ship Maintenance Office (SSMO) in the Naval Sea systems Command has been involved with many different aspects of the problem. Recognizing the two different aspects of the challenge — doing the right things and doing things right — SSMO has been involved with improvements to front-end maintenance planning: doing the right things. These improvements are being formulated for action on three different levels. The first level involves changes to maintenance management philosophy, dealing with maintenance as a technology subject to systematic processes. The second level involves specific NavSea initiatives to strengthen the technical basis for maintenance requirements. The third level involves actions available to the fleet itself to provide relief. Today's surface ship maintenance funding environment provides both a challenge and an opportunity for improvement. The challenge is to adapt successfully to constrained maintenance resources; the opportunity is to pioneer new approaches to make this possible and establish the precedent for years to come. The groundwork necessary has been laid and work to meet the challenge has begun.

关键词： Naval Vessels

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