| Budget Amount *help |
¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Outline of Final Research Achievements |
In this study, we focused on the parametric roll resonance, which is a strong nonlinear phenomenon, as a ship motion in the waves. Regarding the parametric roll resonance, we dealt with problems in regular waves and irregular waves. We confirmed that coefficients in the equation of motion (mathematical model) estimated by experiments and so on can be estimated by successive data assimilation. This means that it is possible to evaluate the presence or absence of parametric roll resonance by assimilating the data of the free-running model experiments or of an actual ship motions into the mathematical model. Therefore, based on the proposed method, it is possible to ensure safe ship operation can make a great contribution.
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