大型船の波浪中変動圧および縦通肋骨応力について

概要

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Full-scale measurements of local stresses and wave pressure working on hull side in seaways were carried out on a VLCC. The measurements aimed at understanding the actual condition of working stresses on longitudinal members and wave pressure acting near the load water line. The findings made from the present study are as follows: (1) So far as the results of this full-scale measurements, higher order components of wave pressure owing to wave breaking and/or impact were not remarkable. (2) The mean periods of stresses on side longitudinals were shorter than those of deck or bottom longitudinals. This comes from the difference between the response characteristics in regular waves. (3) It was confirmed by the comparison with the results of full-scale measurement that the prevalent wave pressure estimation based on strip method well explained the short-term characteristics of stress on longitudinals. (4) For the evaluation of local stresses of structural members where various load elements act mutually Discrete Analysis Method (DISAM for short) was found to be effective.
社団法人日本船舶海洋工学会の論文