影響線法による船体縦強度の簡易計算法について

概要

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Ships should be loaded according to the loading patterns desirable from the viewpoint of strength. This is especially important for the large ships intended to carry oil, bulk or ore cargo, and for this purpose ships are equipped with a "Loading Guidance". But in practice it is inevitable for a ship to take some different load conditions from the "Loading Guidance". So, it is necessary to check the longitudinal strength of the modified load condition simply and rapidly on board. In this paper, authors propose a simplified method to calculate not only the drafts, but also the longitudinal distribution of the still water bending moment and shearing force of the ship in load condition. This method is based on the principle of "influence line" and summarized into a simple table on one sheet for practical use. After a comparison of the results of this simplified method with those of precise calculation on a few actual ships, it is concluded that this method is effective with sufficient accuracy as an approximate calculation on board without any calculator, and given a loading table based on a medium load condition, it can be applied to calculate all the conditions between full load condition and ordinary ballast condition.
社団法人日本船舶海洋工学会の論文
1968-07-29