橋脚衝突時の船首強度計算式に対する船体諸寸法の影響

概要

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In these years many bridges and offshore structures have been constructed near ship's waterways. Examples of these are Seto Bridge, opened in 1988; Tokyo Bay Crossing Bridge-Tunnel, opened in December 1997; Akashi Kaikyo Bridge, opened in April 1998; Bridges of Onomichi-Imabari route (Shimanami Kaido Bridge), opened 1st May 1999. Owing to the increase of bridges and offshore structures as well as marine traffic, ship collision accidents with these structures have been increasing. To keep safety from ship collision accident with such structures various kind of protective device are used. It is necessary to estimate the strength of ship in order to design these protective device. In this paper the authors have introduced a simplified formula for calculation of ship bow strength based on relation between various ship dimensions. The effect of 16 dimension related parameters has been studied in this work. No remarkable variations were found between dimension related parameters of recently built ships and earlier ones. Results of calculated ship bow strength were compared with model experiments. Both results were in good agreement. In addition to the above calculation, entrance angle, colliding height and so on were also studied by using this simplified formula.
社団法人日本航海学会の論文
1999-09-25