Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2014.425.433AungNyan WinHaijunWeiSun Di32014133This article presents a case study of fuzzy Fault Tree Analysis
(FTA) method application to study of the reliability of Jacket cooling water
system of a marine diesel engine. Due to the uncontrollable working conditions
such as ship mobility, states of loading and weather conditions, it is difficult
to get the exact value of failure probability of the basic components including
in the system. To overcome the over and under estimation of the failure probability
of basic events as well as the probability of the undesired event of FTA, fuzzy
set theory is applied in FTA. Fuzzy failure rate of the system is calculated
by fuzzy numbers and fuzzy operators. The result of the FTA is given by fuzzy
probability which can compensate the vagueness or uncertainty of probability
of basic events and engineering errors. Not only the reliability of the jacket
water cooling system but also the importance measure of the basic events of
cooling system are analyzed by fuzzy FTA method. Fuzzy probability ranking method
and Graded Mean Integration Representation (GMIR) distance method are proposed
to use in calculation of the fuzzy importance measures of the components of
the system. From this study, it can be concluded that the jacket water cooling
system analyzed is highly reliable and the basic event of the failure of the
supply air is the most critically important component in the major of events
in the system.]]>Zhou, J. and L. Xu,2011McGeorge, H.D.,2002Tanaka, H., L.T. Fan, F.S. Lai and K. Toguchi,1983Vesely, W.E., F.F. Goldberg, N.H. Roberts and D.F. Haas,1981Yuhua, D. and Y. Datao,2005Mentes, A. and I.H. Helvacioglu,2011Ma, D., Y. Jang, Z. Zhou, T. Zhao and D. Lin,2011Wang, H., W. Li and H. Wang,2011Huang, D., T. Chen and M.J.J. Wang,2001Mao, G.Z., J.W. Tu and H.B. Du,2010Ferdous, R., F. Khan, B. Veitch and P.R. Amyotte,2009Tyagi, S.K., D. Pandey and R. Tyagi,2010Thorani, Y.L.P., P.P.B. Rao and N.R. Shankar,2012Chen, S.H. and C.C. Wang,2006SINTEF Industrial Management,2002Denson, W., G. Chandler, W. Crowell and R. Wanner,1991