Use of hybrid approach in facilitation of design of ship hydrostatic parameters under uncertainty
Abstract
Hydrostatic parameters of a ship are very important in ship design. The importance of the parameters compared to one another need to be revealed in realm of uncertainty, so as to avoid design error. In view of this, a fuzzy-analytical hierarchical process (Fuzzy-AHP) method is utilized in addressing the subject under investigation. The fuzzy logic is used to address uncertainty in pairwise comparison exercise, so as to facilitate the estimation of order of importance of hydrostatic parameters. In this research, the engineering judgements of three designers in analysis of importance of hydrostatic parameters are aggregated and processed using the Fuzzy-AHP methodology. The result produced in the study showed that hydrostatic parameters are importance in order of moments of inertia of vessels (MIV), mass displacement (MD), tons per centimeter immersion (TPCI), coefficients of form (CF), centers of buoyancy (CB), metacentric heights of vessels (MHV), ship waterplane area (SWA), longitudinal center of floatation (LCF), volume displacement (VD) and wetted surface area (WSA) with weight values of 0.218, 0.095, 0.078, 0.083, 0.074, 0.1, 0.46, 0.108, 0.209 and 0.028 respectively.
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Author Biographies
Thaddeus Chidiebere Nwaoha obtained his PhD in Marine and Offshore Technology and MSc in Marine and Offshore Engineering from Liverpool John Moores University, UK in 2011 and 2006 respectively. His professional experiences comprise of academic and industrial experiences in LNG carrier system maintenance and risk modeling, inspection of topside and subsea equipment, quality assurance, safety, risk and reliability analysis of marine and offshore systems. He has served as an inspection, quality assurance, safety and reliability engineer in marine and offshore companies and a member of professional bodies such as IMarEST, NSE and COREN. Since 2010, he has authored and co-authored more than 35 journal papers in world leading journals and one of his papers was nomination for SAGE 2011 best paper award in Journal of Engineering for Maritime Environment. His research interests are marine and offshore system failure analysis, design for safety of marine and offshore systems, optimization, maintenance modeling and risk/reliability analysis. Currently, he serves as a Senior Lecturer in Marine Engineering Department, Federal University of Petroleum Resources, Nigeria.
Idubor Fabian Ifeanyi is a Lecturer in the Department of Marine Engineering, College of Technology, Federal University of Petroleum Resources Effurun Delta State, Nigeria. He holds a BEng in Marine Engineering and a MSc in Naval Architecture and Ship Building, both from Rivers State University, Portharcourt, Nigeria. He also hold an Ordinary National Diploma in Electrical / Electronic Engineering Department from Federal Polytechnic Oko, Anambra State. His area of specialization are Ship Power Plant, Naval Architecture, Ship Structural and Stability Analyses.
Copyright (c) 2019 Thaddeus Chidiebere Nwaoha, Fabian Ifeanyi Idubor
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