円形水槽の造波について

概要

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Since a reflective wave exists in a test basin, it is always necessary to take the influence into consideration in a model experiment. However, if the boundary of basin can absorb a reflective wave completely even if it is a small basin, it will become possible to simulate of the infinite ocean space. Based on this idea, National Maritime Research Institute completed the circular basin in April 2002. It was an upper part of the deep-sea basin, the deep pit with 6m diameter was dug on the center of the circular basin. 128 sets of wave generators are arranged around this basin. Each generator moves to make a wave, and compensates a reflective wave simultaneously. It is possible to make various types of waves by combining a motion of wave generators. In order to investigate wave making properties of circular basin, wave height distribution of regular wave, change of wave height and phase angle by time, and power spectrum and distribution function of irregular wave were measured and examination was added. Consequently, in the model test in this basin, although it needed to be cautious of selection of the size of a model and a wave frequency, it has confirmed that long-sustained measurement was possible, without caring about a reflective wave.
社団法人日本船舶海洋工学会の論文
2004-03-20