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Large floatings tructures are expected to be among alternatives for ocean space utilization in deeper coastal area. It has been reported that elastic response is dominant over rigid motions due to their large dimensions with comparatively small bending rigidities. The elastic response must be decreased in order for the enhancement of the rate of operation and the applicability to severer sea area.L-shape attachment structure which is attached to the weather side of the floating structures is especially investigated for this purpose here. First, the attachment structure is experimentally shown to be effective from the viewpoint of vertical response. Numerical calculations are also conducted by use of rigorous numerical method proposed by a part of the present authors. It is shown that the numerical results have a good accordance with the experimental results. In order to clarify the response reduction mechanism, numerical studies are carried out.

ON THE RESPONSE REDUCTION OF LARGE FLOATING STRUCTURES BY USE OF L-SHAPE ATTACHMENT