入港支援ガイド用のフローターの圧縮変位特性について

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We have studied on the ship entering problem at fishery harbor under severe weather condition. In order to realize the easy entering into harbor, we propose "marine guide fence" which contains floaters. In this paper, we investigate the relation betweeen compression and deflection of the floater. The obtained results are summarized as follows : (1) If a relation between stress σ and strain ε of floater is obtained, it is easy to estimate the deflection and compression characteristics of real floater. (2) The characteristics of the cylinder with cylindrical hollowness can be approximately given by subtracting compression force of the inner cylinder from compression force of the outer cylinder. However, the above approximation contains about 20% error, so the estimated value must be attenuated by multiplying a correction coefficient. (3) The characteristics of the cylinder containing pipe is approximately given by the one of the cylinder of diameter a which is equal to the thickness of the above cylinder. However the above approximation contains about 20〜30% error, so the estimated value must be attenuated by multiplying a correction coefficient. (4) If we obtain the ratio of plane compression of the floater and the floater compression by the frame and ship's model, the characteristics of the real floater in the marine guide fence can be approximately estimated. (5) Carrying out two kinds of expriments of collision angle of 60 deg. and 90 deg., it is clear that the diffrence of the characteristics is negligible.
社団法人日本航海学会の論文
1997-03-25

入港支援ガイド用のフローターの圧縮変位特性について

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