Maintenance/repair and production-oriented life cycle cost/earning model for ship structural optimization during conceptual design stage

摘要

The aim of this paper is to investigate the effect of the change in structural weight due to optimisation experiments on lifecycle cost and earning elements using the life cycle cost/earning model, which was developed for structure optimisation. Therelation between structural variables and relevant cost/earning elements are explored and discussed in detail. The developedmodel is restricted to the relevant life cycle cost and earning elements, namely production cost, periodic maintenance cost,fuel oil cost, operational earning and dismantling earning. Therefore it is important to emphasise here that the cost/earningfigure calculated through the developed methodology will not be a full life cycle cost/earning value for a subject vessel, butwill be the relevant life cycle cost/earning value. As one of the main focuses of this paper is the maintenance/repair issue, thedata was collected from a number of ship operators and was solely used for the purpose of regression analysis. An illustrativeexample for a chemical tanker is provided to show the applicability of the proposed approach.