Determination of Principal Dimensions of Tankers through a Digital Computer

Abstract

A series of programs for "Determination of principal dimensions of tankers" through a digital computer has been established and put into practical use and, as the result, the daily desk work in the design office has been fairly reduced. The function of the present program is, in short, to determine the principal dimensions of tankers not only with neither excess nor deficiency from the basic requirements such as speed, deadweight and from the restrictions, if any, such as breadth etc. but also with the least expensive aspect. While computing, the problems which occur at the stage of the initial design, e. g., capacities of various spaces, trim, such length and disposition of the clean ballast tanks that conform to minimum I/y required by classification societies, freeboard, economical matters etc. are fully taken into account quite similarly to the process by the manual calculations. Thus, the former manual calculations as to the initial design have been programmed almost completely without significant omissions, and various values computed have also been ascertained to be quite close to those worked out by manual calculations. The output items are : Principal dimensions, outline of arrangement, capacities, weight of various items, relation between power and speed, freeboard, some economical figures, etc. Further, separate pages edited in such a format that can be delivered directly to the customers are also appended.