The ASNE JournalCommittee annuallyrecommends that theauthor of the best orig-inal paper, publishedin Naval EngineersJournal during thatyear receives the“Jimmie” HamiltonAward, presentedannually since 1967.The basis for selectionare the professional-ism of subject matter,depth of treatment,importance, and last-ing value, clarity ofcomposition and style,and individual effort.

ASNE DAY 2004

Citation

T HE PAPER “RELIABILITY ASSESSMENT OF CORRODING

Ship Hull Structure” was published in the NavalEngineers Journal, Fall 2003 edition. The authors

have developed an approach for time-dependent reliabilityassessment of the ultimate strength of a ship hull structurein the presence of corrosion. By modeling corrosiongrowth as a time-dependent random function and usingthe second order reliability method to calculate the instan-taneous reliability of the primary hull structure, theydemonstrated that the proposed time-dependent reliabilityis always lower than the instantaneous reliability andmore sensitive to the statistical value of the corrosionparameters than their probabilistic distribution descrip-tions. Time-dependent reliability results provide the basisfor computing hazard functions and subsequent decisionsrelating to life expectancy analysis and extension.

The authors have demonstrated the proposed methodusing a typical cross section of a tanker including para-metric analysis.

This paper captures the essence of time-dependent reliabil-ity-based analysis of ship structures subject to corrosion,and provides a basis for including corrosion in reliabilitystudies in order to obtain realistic estimates. It is definitelyin keeping with the technical standards of the NavalEngineers Journal. The authors are most deserving of theSociety’s 2003 “Jimmie” Hamilton Award.

PresentationAward Presenter — Dr. John C. Daidola, Senior VP of AMSEC LLC

Admiral Mullen, President Sargent, distinguished guests,ladies and gentlemen, this afternoon on behalf of theSociety it’s my pleasure to present the “Jimmie” HamiltonAward for 2003. The honor has been continuouslybestowed since 1967 to the best original paper publishedin the Naval Engineers Journal. For 2003 the award goes

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The American Society of Naval Engineers takes great pleasure in presenting The “Jimmie” Hamilton Award for 2003 to

Dr. Unyime O. Akpan, Dr. Tamunoiyala S. Koko,Dr. Bilal M. Ayyub, and Timothy E. Dunbar

For the best original paper published in the Naval Engineers Journalduring the year 2003 as set forth in the following

[ “ J I M M I E ” H A M I L T O N A W A R D ]

Dr. Unyime O. Akpan

Sr. Tamunoiyala S. Koko

Dr. Bilal Ayyub

Timothy E. Dunbar

to Dr. Unyime Akpan, Dr. TamunoiyalaKoko, Dr. Bilal Ayyub, and Mr. Timothy E.Dunbar for their paper “ReliabilityAssessment of Corroding Ship HullStructure.” The citation that goes along withthe award details the comprehensive workthat was carried out by the authors in arriv-ing at this paper, and it concludes with,“This paper captures the essence of timedependent reliability based analysis of shipstructures subject to corrosion and providesa basis for including corrosion in reliabilitystudies in order to obtain realistic estimates.It is definitely in keeping with the technicalstandards of the Naval Engineers Journal.The authors are most deserving of theSociety’s 2003 “Jimmie” Hamilton Award.”Along with the transformation changesaddressed by ASNE Day this year, we mustalso consider the life cycle of existing andnew systems. The authors’ work is animportant contribution to this end andundoubtedly will have lasting value in thespirit in this award. The interest in the sub-ject I might add is current and internationalin nature. The Interagency Ship StructureCommittee, which in fact, supported thework that the authors’ carried out in thepaper, has recently indicated its recommen-dation for an international consortium pro-gram for large scale testing, for ultimatestrength of new, aged, and therefore corrod-ed and damaged hull structures. I now askthat the authors step forward to receive theiraward and let us offer our congratulations.

About the Awardee — AkpanDr Unyime Okon Akpan is a senior researchengineer in the Emerging TechnologiesGroup at Martec Limited, Halifax, NovaScotia Canada. He has over 16 year engi-neering experience. Dr. Akpan obtained aFirst Class Honors B.Sc. degree in mechani-cal engineering in 1988, an M.Sc. degree inmechanical engineering in 1990, both fromthe University of Ibadan, Nigeria, and a

Ph.D. in mechanical engineering in 1996,from the Dalhousie University, Canada. Heis a member of various professional associa-tions including ASME and AIAA. He is alsoan adjunct professor at Dalhousie University,Canada, where he teaches advanced levelcourses in Finite Element Methods,Mechanical and Structural Vibration, StressAnalysis and Mechanical Design. His area ofresearch interest includes application of reli-ability and risk methods and to complex sys-tems including ship structures, missile struc-tures, aerospace structures and offshorestructures. He has applied numerical opti-mization techniques to the design of primaryship structures and smart structures. He hasparticipated in several SSC projects involvingrisk-based life cycle management of shipstructures and risk-based inspection of shipstructures. He has co-authored over 45 jour-nal and conferences papers.

About the Awardee — KokoDr. Koko is a senior research engineer andmanager of the Emerging TechnologiesGroup at Martec Limited, Halifax, NovaScotia. He has over 20 years engineeringexperience. He is knowledgeable and experi-enced in a wide range of engineering disci-plines, including analysis, design and lifecycle management of ship structures, relia-bility and risk analysis methodologies, finiteelement methods, advanced composite struc-tures/materials, and software development.Over the past five years he has led teams ofMartec personnel in collaborative effortsdealing with the development of probabilis-tic methods for the design, analysis and lifecycle management of ship structures, forboth the U.S. Navy, SSC, and the CoastGuard. These studies include the develop-ment of probabilistic vertical and lateral pri-mary bending loads for a weight-optimizedstructural design of CVN(X) for NAVSEA,and the development of the ROMMSS soft-ware system for optimal maintenance man-agement of vessels and systems. Dr. Koko

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also serves as an adjunct professor in theCivil Engineering Department at DalhousieUniversity in Halifax, NS. He has co-authored over 50 journal and conferencepapers and over 60 technical reports. Dr.Koko is a registered professional engineer inthe province of Nova Scotia and a memberof professional associations including theAmerican Society of Civil Engineers (ASCE)and the Canadian Society for CivilEngineers (CSCE).

About the Awardee — AyyubDr. Ayyub is the general director of theCenter for Technology and SystemsManagement since 1996, and a professor ofcivil and environmental engineering,University of Maryland, College Park,Maryland, 1983-present. He is also a consul-tant and board member of two corporationsthat provide services in the areas of informa-tion technology, risk and decision analysis.He is a registered professional engineer (PE)with the state of Maryland. He completedhis BSCE (1980); MSCE (1981) and Ph.D.(1983), Georgia Institute of Technology,Atlanta, Georgia. As a fellow of ASCE,ASME and SNAME, Dr. Ayyub is the recipi-ent of several awards that include the ASNE“Jimmie” Hamilton Award for the bestpapers in the Naval Engineers Journal in1985 and 1992, the ASCE “OutstandingResearch Oriented Paper” in 1987, theNAFIPS K.S. Fu Award in 1995, the ASCEEdmund Friedman Award in 1989, and theASCE Walter L. Huber Civil EngineeringResearch Prize in 1997. Dr. Ayyub has com-pleted several research projects that werefunded by the U.S. NSF, ONR, NSWC,Coast Guard, Army Corps of Engineers, theMaryland State Highway Administration,the ASME, and several engineering compa-nies. He is a researcher and consultant in theareas of reliability and risk analysis of engi-neering systems, and decision analysis. Dr.Ayyub has an extensive background in

uncertainty modeling and analysis, risk-based analysis and design, simulation, andmarine systems. He is engaged in researchwork involving reliability, marine systems,uncertainty modeling and analysis, andmathematical modeling using the theories ofprobability, statistics, and fuzzy sets. Heorganized three conferences on uncertaintymodeling and analysis in 1990, 1993, and1995, chaired the annual conference ofNAFIPS in 1995. He is the author and co-author of several textbooks, and about 300publications in journals and conference pro-ceedings, and reports. His publicationsinclude edited books, textbooks, and bookchapters. The URL addresseshttp://ctsm.umd.edu/ayyub provide addition-al information of previous and ongoingactivities of Dr. Ayyub.

About the Awardee — DunbarMr. Dunbar obtained a B. Eng. Degree(2000) and a M.A.Sc. (2003) in Civil engi-neering with specialization in structures fromDalhousie University. Mr. Dunbar becameinvolved with the Emerging Technologiesgroup at Martec as a research engineer in2000 and has accumulated approximately 3years of experience with this group.Throughout his work at Martec, Mr.Dunbar gained experience in topics includ-ing finite element analysis (FEA), corrosion,conventional optimization methods, geneticalgorithms (GA), artificial neural networks(ANN), structural analysis, software engi-neering, and drafting. A large portion of Mr.Dunbar’s experience at Martec was spentdeveloping software, entitled V-Optimizer,for the U.S. Navy with a primary purpose toreduce weight (optimize) during the initialdesign of naval vessels.

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