波浪下における漁船出港時の動揺に関する現地計測

概要

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Many harbors have been constructed in the open sea front in Japan. But the shipping activities are often interrupted in a rigorous season for the strong wind and heavy seas. So, we developed ship motion measurement system during leaving and entering into harbor under severe wave condition. And, we carry out a filed observation of fishing boat motions at departure under head sea condition. The obtained experrimental results are summarized as follows : (1) The fishing boat which is leaving harbour in head sea arises rolling, pitching and accelerations of heaving at once. (2) Using positions of fishery boat by Laser Tracking Positioning System, hights wave and wave directions observed at fixed point, the waves beneath the running boat could be caluculated. It is found that the wave beneath the running boat will be short period in head sea compared with the wave observed at fixed point. (3) It is found that the waves beneath the running boat correspond with the accelerations of heaving and these signs of amplitude are reversed.
社団法人日本航海学会の論文
1998-03-25