Fast sea transportation system with superior seaworthiness and economic efficiency

2015 Fiscal Year Final Research Report

• Project/Area Number: 23246151
• 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: Kyushu University
• Principal Investigator: YOSHIDA MOTOKI 九州大学, 経済学研究科(研究院), 教授 (20404080)
• Co-Investigator(Kenkyū-buntansha): KINOSHITA TAKESHI 東京大学, 生産技術研究所, 教授 (70107366) ; KAJIWARA HIROYUKI 九州大学, 大学院工学研究院, 教授 (30114862) ; KIHARA HAJIME 防衛大学校, 機械システム工学科, 教授 (40283717) ; IWASHITA HIDETSUGU 広島大学, 大学院工学研究科, 教授 (60223393) ; KANDA MASAMITSU 株式会社三井造船昭島研究所 (00561573)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 海洋流体工学 / 波浪中運動制御 / 高速船 / 耐航性 / 定時性 / 耐波浪衝撃性 / 輸送効率 / 経済性

Outline of Final Research Achievements

It has been verified by means of theoretical calculations, experiments and time domain simulations that a “Resonance-Free SWATH” as the oceangoing large fast ship has the superior seaworthiness. Firstly, the unsteady characteristics of lift generated by small control fins were clarified. Secondly, the latent ability of RFS for seaworthiness is not completely made use in the case of PD control acts as the large restoring force. A nonlinear sliding mode control has been applied to make up for deficiencies in PD control. As a result, the effectiveness of the sliding mode control has been confirmed. Thirdly, very small added resistance due to waves of RFS has been discussed. Fourthly, the quality of RFS transportation system has been discussed. The quality regarding the navigation time and the number of slammings are very good. Finally, superior economic potential of RFS transportation system has been clarified.

Free Research Field

船舶工学