係留半潜水式海洋構造物の風波併存時における運動及び相対水位変動

概要

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Generally the critical motions and relative water surface of a moored semisubmersible are very complicate under combined external disturbances ; namely steady wind, dynamic variable winds and irregular waves. This paper deals with the steady and variable parts using frequency domain approach. The analysis is done for wave frequency and very low frequency. Theoretical predictions are compared to experimental results and a good agreement is obtained. Also the effect of the damping coefficient on the response spectrum estimation of very low frequency is discussed, and the cause for scattered statistical values estimated from response spectrum is investigated. Finally, a practical method for total prediction for motion and relative motion including the very slowly varying phenomena and steady drift parts is introduced.
社団法人日本船舶海洋工学会の論文