Successive data assimilation for the mathematical model of ship motions in waves under navigation

2016 Fiscal Year Final Research Report

• Project/Area Number: 25289328
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Fisheries Research and Education Agency
• Principal Investigator: Terada Daisuke 国立研究開発法人水産研究・教育機構, 水産工学研究所, 主任研究員 (80435453)
• Co-Investigator(Kenkyū-buntansha): 松田 秋彦 国立研究開発法人水産研究・教育機構, 水産工学研究所, 主幹研究員 (10344334) ; 橋本 博公 神戸大学, 海事科学研究科(研究院), 准教授 (30397731)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 船舶運動性能 / 逐次データ同化 / パラメトリック横揺れ

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.

Free Research Field

船舶海洋工学