Study on multi-directional irregular wave field inducing strong nonlinear phenomena and ship motion

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246152
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: National Maritime Research Institute
• Principal Investigator: UENO Michio 独立行政法人海上技術安全研究所, その他部局等, 研究員 (60358405)
• Co-Investigator(Kenkyū-buntansha): TSUKADA Yoshiaki (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (90425752) ; MIYAZAKI Hideki (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (10415797) ; KITAGAWA Yasushi (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (50579852) ; SUZUKI Ryosuke (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (20711328) ; TAGUCHI Harukuni (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (70344455) ; KURODA Takako (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (00415811) ; HOUTANI Hidetaka (国立研究開発法人)海上技術安全研究所, その他部局等, 研究員 (30636808)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 海難事故再現 / 多方向不規則波 / 波風併存時気海象 / 荒天下操船限界 / 補助推力装置 / 自由航走模型実験 / メモリー影響関数 / 傾斜時船体運動

Outline of Final Research Achievements

Our directional wave analysis verified the method realizing short-crested irregular wave field in our model ship basin. Tank test using model ships in both waves and wind successfully realized a ship running in actual sea condition and our measurement and analysis confirmed the validity of the experimental technique. Free-running model tests successfully reproduced in model scale actual accidents such as large roll motion of a fast ferry and broaching-to of a fishing vessel in the similar wave fields estimated and reproduced for the accidents. We developed an auxiliary thruster for free-running model test and a method realizing full-scale equivalent ship motion in wind and waves using scale models. Our numerical method confirmed its validity to calculate transient motion of an initially inclined ship in irregular waves.

Free Research Field

船舶海洋工学