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Houtani, Hidetaka,Komoriyama, Yusuke,Matsui, Sadaoki,Oka, Masayoshi,Sawada, Hiroshi,Tanaka, Yoshiteru,Tanizawa, Katsuji Korean Society of Ocean Engineers 2018 Journal of advanced research in ocean engineering Vol.4 No.4
We herein propose a new design procedure of a flexible container ship model where the vertical bending and torsional vibration modes are similar to its prototype. To achieve similarity in torsional vibration mode shapes, the height of the shear center of the model must be located below the bottom hull, similar to an actual container ship with large opening decks. Therefore, we designed a ship model by imparting appropriate stiffness to the hull, using urethane foam without a backbone. We built a container ship model according to this design strategy and validated its dynamic elastic properties using a decay test. We measured wave-induced structural vibrations and present the results of tank experiments in regular and freak waves.