レーザによる船体の微小変形の測定

概要

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Small deflections of ships due to the temperature distribution of the ship's hull and due to the distribution of loads have been measured. When an upper deck is heated by the sun, the ship sustains vertical deflections (hogging), and when either side of the ship's hull heated by the sun, the ship deflects horizontally. In process of unloading, the 55, 000dwt ore carrier sustained positive or negative vertical deflection ranging from -60mm (sagging) to +40mm (hogging). These measured deflections were compared with the calculated values based on the simple beam theory. The shafting alignment of the 14, 000dwt cargo boat were also measured using the laser beam. The small deflection of the alignment was related with the hull deflections caused by the temperature distribution of the hull.
社団法人日本航海学会の論文
1974-07-31