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An experimental investigation into the influence of the damage openings on ship response
Affiliation:1. Aalto University, Department of Mechanical Engineering, Espoo, Finland;2. Universitá degli Studi di Napoli, Federico II, Department of Industrial Engineering, Naples, Italy;1. Aalto University, Helsinki, Finland;2. Universidade Federal do Rio de Janeiro, RJ, Brazil;1. Aalto University, School of Engineering, Department of Applied Mechanics, Helsinki, Finland;2. NAPA Ltd, Helsinki, Finland;1. Graduate School of Maritime Sciences, Kobe University, 5-1-1, Fukae-minamimachi, Higashinada-ku, Kobe 658-0022, Japan;2. National Institute of Maritime, Port and Aviation Technology, National Maritime Research Institute, 6-38-1, Shinkawa, Mitaka, Tokyo 181-0004, Japan;3. Research Institute of Applied Mechanics, Kyushu University, 6-1, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan;1. University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia;2. University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia;3. University of Rijeka, Faculty of Engineering, Rijeka, Croatia;1. Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan, 430063, China;2. School of Transportation, Wuhan University of Technology, Wuhan, 430063, China;3. CCCC Second Harbor Consultants Co., Ltd, Wuhan, 430071, China;4. Donghai Science and Technology College, Zhejiang Ocean University, Zhoushan, 316000, China
Abstract:Ship motions after damage are difficult to evaluate since they are affected by complex phenomena regarding fluid and structures interactions. The possibility to better understand how ship behavior in damage is influenced by these phenomena is important for improving ship safety, especially for passenger vessel.In this paper an experimental campaign is carried out on a passenger ferry hull, to show the effects of the water dynamics across damage openings on ship motions. Novel aspects of this research include the study of the effects of the damage position on the ship roll response. The study is carried out for still water and for beam regular waves at zero speed.Results from the experiments carried out underline that the roll behavior of a damaged ship is affected by the position of damage opening and not only by its size. Assuming the same final equilibrium conditions after flooding but characterized by different damage openings it is possible to observe how motions RAOs and roll decay characteristics modify according to the opening locations.
Keywords:Ship motions  Roll decay  Towing tank  Experimental test  Damage stability  Ship dynamics  Sloshing
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