Combining Weibull Distribution Function and Monte Carlo simulations in Predicting Corrosion Losses Over Inner bottom and Hoper Plating of Ageing bulk-Carriers

Abstract

This article gives an overview of main operational parameters that influence corrosion over ageing bulkcarriers’ member locations. The particular vessels’ hull structure locations being affected intensively by these parameters are identified, as well. The zone identified as the most vulnerable one, i.e. inner bottom and hopper plating, has been probabilistically treated. Within the extensive previous probabilistic analysis of the corrosion losses over aging bulk carriers, it has been shown that the considered data exhibit great scattering. The same was with the data which were available to us for the purpose of this research work. In fact, it was difficult to fit the data collected by the regular and standardized ships’ measurements on board by the UTM Company “Invar-Ivosevic”1, to the most commonly used Weibull distribution, which usually in the best manner fits the corrosion wear over considered ageing ships. Consequently, an optimal procedure of pre-processing the collected data in order to better fit them into the Weibull distribution function, has been proposed in the article.