Experimental Study on Ship Motions in Regular Waves

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Najafi, Amin | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41715 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Seif, Mohammad Saeed; Mehdigholi, Hamid
Abstract:
Regarding the increasing application of fast boats in the world, studying the dynamic performances of these boats is consequently effective and vital. So one can evaluate the hull performance in different sea forces. Vast activities take place in all over the world yearly. General performances hull tests occur in marine laboratories such as Wave maker and carriage. Model hull test is one of effective branches of the naval architecture engineering. This method is also based on dimensional analysis. In this thesis, after understanding the waves and the methodology some experimental tests are done in the conditions of frontal static waves, and heave, pitch and roll activities of the craft are calculated. Prismatic hulls are also perused based on Savitsky method to evaluate the high speed crafts performances. At last, an effective computer code is developed. Finally, Domain, Wave length, boat speed influence are studied. Consequently, the empirical and numerical results are compared. As a result, the more increase in wave length the more accordance between empirical and experimental results occurs.
Keywords:
Ship Model ; Waves ; Pitch Boat ; Heave Boat ; Pitching Motion

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