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MATERIALS ASPECTS OF DAMAGE TOLERANCE AND RELIABILITY OF SHIP STRUCTURES AND COMPONENTS

NAVAL ENGINEERS JOURNAL 1994年第4期106卷 192-207页

作者： KHAN, MZS SAUNDERS, DS BURCH, IA MOURITZ, AP Dr. M. Z. Shah-Khan: currently a research scientist received his Bachelor of Engineering degree in Mechanical Engineering from Osmania University India in 1978. He took postgraduate work at Iowa State University receiving an M.S. degree in Metallurgy in 1981. In 1983 he joined University of New South Wales Australia and obtained the Doctor of Philosophy degree in Metallurgy in 1986. In 1986 he assumed his present position where he has been active in the research of fatigue and fracture of high strength naval construction steels in support of the Naval Ship Structure Research Program. His recent work has been in the development and application of techniques for the measurement of residual stress during the fabrication of a submarine hull. Dr. D. S. Saunders: B. Appl. Sc. (Hons) Adelaide Ph.D. Monash is a principal research scientist and has been involved in research into the fatigue and fracture behaviour of steels and aluminum alloys. He has worked on the development of fracture toughness specimens for artillery projectiles and rocket motors and has undertaken development and application of elastic-plastic fracture toughness techniques to high strength steels for military applications. More recently he has studied the fatigue behaviour of carbon fibre composite laminates for aircraft applications. Present research involves the application of composite materials to naval structures and the development of fracture mechanics methods which can predict fracture properties in materials under high rates of loading. Dr. Saunders is a member of the Institution of Engineers of Australia and is affiliated with the Materials Society and the Composite Structures Society of the IEAust. Mr. Ian A. Burch: Dip. Appl. Sci. in Sec. Metallurgy Royal Melbourne Institute of Technology is an experimental officer and is involved in assessing the fracture properties of high strength hull steels for ship and submarine use. He is currently involved in developing the crack arrest fracture toughness test for assessing the dynami

The design and development process prior to the fabrication of maritime structures such as merchant ships, naval surface ships and submarines include the specification of a range of materials required to perform under most adverse conditions of environment and operational loads. The damage tolerance and reliability of such structures can only be assured through appropriate materials selection, application of regorous testing methodologies and through-life inspection and monitoring. The importance of the consideration of damage tolerance and reliability of maritime structures can be gauged by the consequences of in-service failures;for example, the break-up of merchant ships resulting in environmental disasters, loss of lives and wartime damage of naval ships and submarines. Factors that lead to service failures include corrosion, fatigue, corrosion fatigue, low toughness and poor design, and often these factors occur in combination. The range of materials used in maritime structures is diverse and includes mild steel (ship) plate, micro-alloyed steels, aluminium alloys and monolithic and foam sandwich glass fibre laminates. These materials all have different responses to the environmental and loading conditions and consequently extensive materials testing programs are necessary to put damage tolerance and reliability indicators in place. This paper addresses the materials and testing aspects of damage tolerance and reliability assessment of maritime structures, and deals broadly with corrosion and corrosion fatigue testing;fracture toughness testing;measurement of residual stresses within the structure;damage assessment and life calculations. The paper discusses testing methodologies that obtain essential property data for various materials under a range of environmental and loading conditions. The paper briefly addresses the application of property data to the prediction of the behavior of maritime structures and components as well as application to life prediction

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ESTABLISHING THE FUNDAMENTALS OF A SURFACE SHIP SURVIVABILITY DESIGN DISCIPLINE

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NAVAL ENGINEERS JOURNAL 1994年第1期106卷 71-74页

作者： BALL, RE CALVANO, CN Robert E. Ball:attended Northwestern University where he received BS and MS degrees in civil engineering in 1958 and 1959 and a Ph.D. in structural mechanics in 1962. From 1962 to 1967 he worked in the aerospace industry. In 1967 he joined the faculty of the Naval Postgraduate School (NPS) Monterey Ca. and is currently a professor in the department of aeronautics and astronautics. In 1976 Dr. Ball began developing an educational program in aircraft combat survivability at NPS. Approximately 3500 Navy Marine Army and Air Force officers DoD civilians and civilians from the US aircraft industry attended his NPS graduate level and short courses since 1977. He has conducted short courses for NATO and the governments of Canada and Greece. He has also developed similar graduate level courses at NPS in air defense lethality and surface ship combat survivability. He has conducted an extensive research program in survivability and lethality at NPS directing over 110 theses and in 1985 his 400 page textbook The Fundamentals of Aircraft Combat Survivability Analysis and Designwas published by AIAA. He is a Fellow of AIAA. Charles N. Calvano:is a 1963 graduate of the U.S. Naval Academy and a 1970 graduate of MIT with an MS in ocean engineering and a naval engineer's degree. His active duty Navy career spanned twenty-eight years culminating in assignments in the Naval Sea Systems Command as the director of the ship design group and as the director for ship concepts and technology. He joined the faculty of the Naval Postgraduate School in October 1991 and is developing and teaching the total ship systems engineering curriculum discussed in this paper. He is a member of ASNE and of the Society of Naval Architects and Marine Engineers.

This paper describes a conceptual structure of ship survivability definitions and concepts and deals with the need to incorporate a total-ship approach to surface ship combat survivability as part of the philosophy used to guide a ship's design. Included are: A discussion of the increasing emphasis placed on ship survivability during the ship system development process. Definitions of the different aspects of ship survivability, in order to suggest a coordinated and coherent understanding of their relationships. A discussion of the value of making survivability considerations an integral part of the ship design philosophy, to ensure a requirements-based systems approach to all of the ship's required attributes, including survivability.

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BEST VALUE CONTRACTING

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NAVAL ENGINEERS JOURNAL 1993年第6期105卷 59-68页

作者： ZACKS, MR DEMAS, TA Michael R. Zacks:attended Massachusetts Maritime Academy and received his bachelor of science in marine engineering degree in 1985. He is currently enrolled at the University of Maryland where he is working on a master's degree in general administration/financial management. Mr. Zacks is the assistant project manager for the Coastal Living Marine Resource Vessels in the National Oceanic Atmospheric Administration's (NOAA) Fleet Modernization and Replacement Program Office. His current responsibilities encompass providing technical and management support for the procurement construction testing and delivery of these ships. His previous jobs included working for the Naval Sea Systems Command's (NavSea) Combat Support Ocean Research and Surveillance Program Office (PMS 383) Ship Design and Engineering Directorate's Surface Launched Weapons Branch (56W3) and Research Analysis and Management (RAM) Corporation. Thomas A. Demas:received a bachelor of science degree in civil engineering from Old Dominion University and a master's degree in business administration from Averett College. He is a recent graduate from the NavSea Commander's Development Program (CDP). Mr. Demas is the assistant project manager for the AGOR-23 24 25 and National Oceanic and Atmospheric Administration's oceanographic research ships in NavSea's Combat Support Ocean Research and Surveillance Program Office. While participating in the CDP Mr. Demas worked in the following offices: OpNav OP321 as a FMP action officer CincPacFlt N43 as a maintenance officer ASN(RD&A) as director of maintenance and modernization and NavSea 56W14 as a branch head of closures and outfitting branch. Prior to the CDP he held a position with the Gas Turbine Surface Combatant Program Office as the West Coast project manager for DD-963 class destroyers. Before working for NavSea Mr. Demas was employed as a junior engineer with TRACOR and C-CUBED Corporation. His responsibilities included providing general systems engineering support to NavSea and the Nava

The best value concept is based on making decisions on an offeror's technical competence, proven past performance, management capability, life-cycle costs, and product quality. The evaluation of these factors should be structured to ensure consideration is given to determine the overall benefit associated with the offered price. This paper advocates using the best value concept as the method for developing and rating proposal evaluation factors for the procurement of new ships. It discusses methods for establishing evaluation factors, developing standards to evaluate, associated documentation, and weighting and scoring the factors. The information for this paper was obtained from personal interviews, hands-on experience developing and evaluating best value proposals, and documentation research. If properly executed, the best value concept will enable the Navy to improve ships while reducing operating costs.

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CHIEF ENGINEER AS CHIEF LOGISTICIAN

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NAVAL ENGINEERS JOURNAL 1993年第5期105卷 31-36页

作者： ROWLEY, UH SMITH, JL U.H. (Jack) Rowley:is vice president and director of engineering and logistics at Coast Engineering and Logistics Inc. (CEL). He has both a master of mechanical engineering and ocean engineer degree from MIT as well as a bachelor's degree in electrical engineering from University of Oklahoma. Co-founder of CEL in 1990 Mr. Rowley is a retired Navy engineering duty officer with extensive experience in program management engineering and logistics. Jack Rowley served his last Navy tour of duty from 1985 to 1990 as project officer for the Navy's successful Landing Craft Air Cushion (LCAC) Program. As the CEL director for both engineering and logistics he has used these principles in his own business and is a firm believer in the merits of full logistics and engineering integration into a joint organization. Mr. Rowley can be contacted in the CEL Slidell La. office at 504–643–9408 fax 504–643–9210. Jimmy L. Smith:is president and co-founder of CEL. Mr. Smith has over 25 years experience in the logistics arena and has previously served as logistics director for several major shipyards including Avondale Shipyards and Lockheed Shipbuilding. With all of his experience as a logistician Mr. Smith so firmly believes in and understands the merits of integrating engineering and logistics that he has handed over the reigns of logistics in his company to an engineer. Mr. Smith can be contacted in the CEL Corporate office in Biloxi Ms. at 602–392–0736 fax 601–392–9743.

Many successful military weapons programs are plagued by ''unsuccessful'' logistics documentation at the time of weapons system delivery. In effect, the engineering is complete but the logistics is lacking. In many cases, this is a result of engineering changes that complicate the logistics process and drive it further behind schedule to the point it cannot possibly ''catch up.'' Yet the finger is always pointed at the logistics process primarily due to a lack of understanding of how the engineering and logistics should be integrated. To ensure full integration, it is necessary to train engineers in the logistics process so that they fully understand their impact. In order to accomplish this, the chief engineer must also be responsible for the logistics department and its deliverables. This paper will not only look at the required training and how the departments should be integrated, but also the types of mandatory interaction that engineers and logisticians must have to understand each other's requirements and deliverables. Many decisions made properly at the engineering level can greatly minimize the impact on the logistician and this process. This will provide a better product delivered on time with proper logistics and at decreased cost. Only a trained engineer with full knowledge of logistics and full control over a joint engineering/logistics department has the ability to make this happen. The term ''integrated'' in ILS must include not only all logistics components, but also engineering.

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UNDERWATER INSPECTION FOR WELDING AND OVERHAUL

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NAVAL ENGINEERS JOURNAL 1993年第5期105卷 37-42页

作者： MITTLEMAN, J SWAN, L John Mittleman:is a mechanical engineer at the Naval Surface Warfare Center Dahlgren Division Coastal Systems Station in Panama City Florida. His Primary Responsibilities are in the development of underwater nondestructive testing equipment for use by fleet divers and inspectors. He also performs research in the characterization of metal microstructure through ultrasonic scattering measurements. Mr. Mittleman received his BS from Cornell University in 1969 and science master's in ocean engineering from the Massachusetts Institute of Technology in 1970. His research currently supports doctoral studies with Iowa State University. Mr. Mittleman received the American Society of Naval Engineer's Solberg Award in 1981 for his contributions to underwater ship hull inspection. Mr. Mittleman is a member of ASNE ASNT ASTM IoD Sigma Xi Tau Beta Pi and Phi Kappa Phi. Lisa Swan:is a mechanical engineer at the Naval Surface Warfare Center in Panama City Florida. She is involved in nondestructive testing engineering primarily in the underwater arena. Ms. Swan holds a bachelor of science in materials engineering from North Carolina State University. She is a graduate of the Federal Women's Executive Leadership Program. Ms. Swan is a member of ASNT.

Significant progress has been made in making underwater ultrasonic thickness gauging and magnetic particle inspections available to the fleet. Under sponsorship from the Naval Sea Systems Command, Director of ocean engineering, Underwater Ship Husbandry Division (NavSea 00C5), the Coastal Systems Station has developed complete hardware packages supporting these two nondestructive test methods, and has introduced them to military inspectors at a shore intermediate maintenance activity, a destroyer tender, and a naval shipyard. Performance trials conducted prior to taking the systems to the field have been accepted by NavSea, Ships' Concepts Group, Materials Subgroup, Metals Division (NavSea 5142) as evidence that these inspections can reliably be performed underwater. Avenues for certifying specially trained divers and inspectors are being developed;for the first time the Navy will have all of the elements in place for underwater inspections satisfying the requirements of Mil-Std-271 (Requirements for Nondestructive Testing Methods) and the Naval Ships' Technical Manual Chapter 074. Underwater ultrasonic thickness gauging has also been slated for use in the fleet, as data from laboratory and field trials have consistently shown that reliable results can be obtained by a team comprising a certified topside inspector and a diver. In tests performed at the Ship Repair Facility (SRF), Yokosuka, underwater readings were compared to those taken in dry dock by SRF inspectors, and independently by contract inspectors. On the basis of approximately 800 locations, differences between the data sets were found to be randomly distributed, with a standard deviation on the order of 0.02''. This level of accuracy is largely sufficient to distinguish plate which will need replacement during overhaul, or plate which is thick enough to weld on.

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NUMERICAL MODELING OF CAVITATION BUBBLE BEHAVIOR AND NOISE

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NAVAL ENGINEERS JOURNAL 1992年第1期104卷 36-45页

作者： OSBORNE, GE LATORRE, R Gregory E. Osbornereceived his bachelor's degree BA in chemistry from Vanderbilt University in 1986. He continued his education at the University of New Orleans (UNO) where he received a master of science in engineering (naval architecture and marine engineering) in 1990. During that time he served as a graduate teaching assistant. The work in this paper represents part of his master's thesis at UNO. He is currently attending the Massachusetts Institute of Technology pursuing a doctoral degree in ocean engineering. His research interests include cavitation acoustics structural vibrations and noise induced vibrations. Dr. Robert Latorreis professor and chairman of naval architecture and marine engineering at the University of New Orleans (UNO). He designed and directs the Ship Off shore University Laboratory Towing Tank (125 ft × 15 ft × 7 ft deep) facility. He graduated from the University of Michigan with a BSE degree (magna cum laude) in naval architecture and marine engineering in 1971. He was awarded an MS degree (naval architecture) under a SNAME graduate scholarship in 1972. After studying the Japanese language at Middlebury College in Vermont he entered the University of Tokyo where he received an MSE (naval architecture) in 1975 and a Dr. Eng. (naval architecture) in 1978. Before joining the University of New Orleans Dr. Latorre was an assistant professor in the Naval Architecture and Marine Engineering Department at the University of Michigan from 1979–1984. He taught fluid mechanics during the 1986–87 academic year in the Mechanical Engineering Department of the University of Tokyo. He has been a visiting researcher at the David Taylor Research Center and the Basin d'Essais des Carenes French Navy in Paris. His areas of interest are numerical hydrodynamics cavitation noise high-speed craft and ocean engineering.

This paper summarizes a study on the numerical analysis of cavitation bubble noise and presents the results of a numerical analysis of the pressure pulse developed during a single cavitation bubble collapse and the development of a 1/3 octave noise spectral analysis. The results of a systematic numerical study of bubble growth are presented along with an example of the calculated 1/3 octave noise spectra.

关键词： Cavitation

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CAD CAM GOES TO SEA - THE SAAR-5 DESIGN AND CONSTRUCTION

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NAVAL ENGINEERS JOURNAL 1992年第3期104卷 148-155页

作者： LINDGREN, JR SOLITARIO, WA MOORE, AP STREIFF, MA John R. Lindgren Jr:. is vice president for engineering at Ingalls Shipbuilding Inc. a Division of Litton Industries in Pascagoula Miss. He joined Ingalls in 1958 and has held various positions in the Engineering Division and participated in the design of numerous merchant ships drill rigs submarines and surface combatants and auxiliary support ships. Mr. Lindgren is a 1958 graduate of the University of Southwest Louisiana. His degree is in mechanical engineering and he is also a licensed professional engineer. William A. Solitario:is the director of advanced technology at Ingalls Shipbuilding Inc. in Pascagoula Miss. He received his B.S. degree in chemical engineering from the City University of New York and has 28 years experience in marine engineering and design. His current responsibilities include the direction of Ingalls' IRAD programs and several Navy-funded R&D programs to improve ship's performance and reduce ship's operating costs. He is a member of the Society of Naval Architects and Marine Engineers and past chairman of the Gulf Section East Area. Arnold P. Moore:is the director design engineering at Ingalls Shipbuilding where he is responsible for all new construction design and engineering activities. Prior to promotion to his current position Mr. Moore served as chief naval architect at Ingalls. He has 24 years experience in ship design construction and repair. Mr. Moore holds the professional degree of ocean engineer as well as a master's degree in naval architecture and marine engineering from MIT. He also earned a bachelor's degree in naval science from the U.S. Naval Academy and is a registered professional engineer. Mr. Moore served as an engineering duty officer in the U.S. Navy and is currently a captain in the Naval Reserve. He is a past chairman of the Gulf Section of the Society of Naval Architects and Marine Engineers and a member of the American Society of Naval Engineers and Sigma Xi. Michel A. Streiff:is the manager of CAD/CAM applications at Ingalls Shipbuilding Inc. His

The SA'AR-5 Corvette program is the first major warship construction to be entirely accomplished using a 3-dimensional, interference checked computer based design. This paper discusses the organization and approach used to create the design models which form the basis for interference checking as well as the source of extracted production data. The design or product model is the nucleus of the computer data base that defines the configuration of the entire ship. The data base includes geometry, weight, and material, as well as production control data. The ability of the computer to link such diverse information is the key to maintaining configuration control during the course of the design and construction. The ease with which formatted manufacturing data (both N.C. fabrication and installation) can be extracted enables the preparation of detailed packages containing the desired geometry as well as the associated material and sequencing data, thus assuring the producibility of the design. The SA'AR-5 design is CAD/CAM's state of the art in U.S. shipbuilding.

关键词： Warships

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FFG-61 PROTOTYPE DIGITAL TECHNICAL LIBRARY

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NAVAL ENGINEERS JOURNAL 1992年第2期104卷 58-68页

作者： VINROOT, CA ORNER, JG USN Capt. Charles A. Vinroot USN (Ret.)retired from the U.S. Navy in September 1991 following over 27 years of active duty as an engineering duty officer. He holds a BSEE from North Carolina State University and a MSEE and professional degree from the U.S. Naval Postgraduate School. During his naval career he served on USSIndependence (CVA-62) and USSLuce (DLC-7/DDC-38). He also served at Supship Quincy Mass. and Hunters Point Naval Shipyard. He was stationed in Washington D.C. with assignments at CNO (OP 98) ASN (S&L) and the Naval Sea Systems Command. Captain Vinroot was technical director of the Battleship Reactivation Program (PMS 378) technical director of the Destroyer Acquisition Program (PMS 389) and deputy program manager of the Amphibious Warfare and Strategic Sealift Program (PMS 377). Most recently he served as program manager for Gas Turbine Surface Combatants (PMS 314) and Surface Combatants (PMS 330). Captain Vinroot is now employed by PRC Inc. and serves as technical director for the Advanced Technology Division in Crystal City Va. Jeffery G. Ornergraduated from Wittenberg University in Springfield Ohio in 1979 with a bachelor of arts degree in political science and earned a master's of science degree in business from The American University in Washington D.C. in 1982. He has ten years of professional experience with the Naval Sea Systems Command in positions with responsibilities for logistic support planning policy and delivery computer-aided acquisition and logistic support and Fleet Modernization Program (FMP) and ship construction issues. He was a key player in establishing the current FMP integrated logistic support (ILS) process and in implementing of the Ships' Configuration and Logistic Support Information System (SCLSIS). His current position as Fleet Logistic Support Branch head for the Surface Combatant Program includes responsibility for logistic support and management of ship configuration and logistic data for all surface combatant ships (except for Aegis ships). In

USS Ingraham (FFG-61) is the prototype ship for NavSea's Advanced Technical Information System (ATIS). ATIS is a digital technical library, which holds on optical disks the ship's 2,000 technical manuals and 73,000 drawing sheets. It contains a detailed ship's configuration index (derived from SCLSIS) to lead the user to the proper drawing or manual, and it replaces the ship's aperture cards and the second (library) copy of the technical manuals. ATIS, and the data standards established and tested through ATIS development, will be the technical library portion of micro-SNAP and SNAP III. It also forms an important part of NavSea's plans to utilize EDMICS data. This paper describes the goals and technical concepts behind the development of ATIS. Problems encountered, solutions developed, and lessons learned are detailed. Special attention was paid to the application of the Computer Aided Acquisition and Logistic Support (CALS) standards, problems caused by conflicts and ambiguities in those standards, the standards. Original program goals are compared with actual operational experiences. Plans for future expansion are outlined, including applications of this technology in the availability planning and execution process. A comparison is developed among the various methods of optical imaging and their costs and benefits.

关键词： Information Retrieval Systems

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POLAR CLASS ICEBREAKER oceanOGRAPHIC MISSION UPGRADE

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 218-230页

作者： TILYOU, M THAYER, N ZIMMERMANN, RP Mark Tilyouis a mechanical engineer in the U.S. Coast Guard Headquarters Naval Engineering Division Technical Branch Machinery Section. His responsibilities include specifications development and coordination of deck machinery and hydraulic and science support systems for new construction and major renovations of Coast Guard cutters. Mr. Tilyou has a bachelor of science degree in mechanical engineering from the University of Maryland and has been in the Machinery Section for 16 years. He is a member of the American Society of Mechanical Engineers. Neal Thayeris chief of the Science Branch within the Ice Operations Division at U.S. Coast Guard Headquarters. He is responsible for providing coordination between the Coast Guard Icebreaker Program and the polar research community. Previous experience includes seven years as a Coast Guard officer including a tour as a deck watch officer on boardWestwinda Coast Guard icebreaker decommissioned in 1986. Mr. Thayer has a bachelor of science degree in oceanography from Humboldt State University (California). Richard Zimmermannis a senior naval architect with Designers & Planners Inc. His 16-year design agent experience has encompassed most of the naval architectural and marine engineering disciplines and he has managed several large total ship design projects at D&P. His 10-year active duty naval service included tours aboard destroyers and naval shipyard duty. Mr. Zimmermann has a bachelor of science degree in engineering from the U.S. Naval Academy a master of science degree in mechanical engineering from the Massachusetts Institute of Technology and an ocean engineer degree from MIT.

In supporting U.S. polar programs, U.S. Coast Guard icebreakers have two missions: logistics support (break-in and ship escort), and research support (providing research platforms for the U.S. polar research community). The retirement in recent years of CGC Glacier and the last two Wind class icebreakers has left the Coast Guard with just two Polar class icebreakers to conduct missions in the Arctic and Antarctic. It has become clear in recent years that the research community needed enhanced scientific facilities available on board the two remaining Coast Guard icebreakers. Historically, the Coast Guard has provided scientific support to embarked scientific parties on board its icebreakers, carrying researchers in a wide variety of fields into the ice of both polar regions. After conducting a survey of the polar research community and holding a series of meetings with users of the vessels to ascertain the needs of the user community, the Coast Guard has undertaken an effort to upgrade the research support capability of the two existing Polar class vessels. Improved research support capabilities were designed with ongoing consultation with the polar research community. The upgrade of facilities on the two vessels was divided into two phases: Phase I, an upgrade of geological facilities and Phase II, an upgrade of the general oceanographic facilities. This paper focuses on the design work for the Phase II upgrades on CGC Polar Sea, consisting of construction of oceanographic and geological lab spaces, construction of a new oceanographic winch room, the addition of over-the-side weight handling equipment, the addition of topside support services for scientific vans, and the acquisition of new science winches.

关键词： Ships

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

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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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