Reducing the wave load of oyster rafts in Hiroshima Bay [Japan], 1: Investigation of mooring
2005
Yasukawa, H.(Hiroshima Univ. (Japan)) | Nishi, K. | Negi, S. | Doi, Y. | Hirata, N. | Kose, K.
In this paper, manufacturing an oyster raft model with scale ratio 1/10, and by use of the model, investigation was made to improve the durability against waves from the viewpoint of improvement of the mooring. Consequently, the following knowledge was obtained: under conditions without "suikaren", the large improvement is obtained by attaching floats to the mooring wire. The mooring method proposed here is useful for keeping the fatigue strength of the oyster raft in the stage where "suikaren" is seldom growing. Under conditions with "suikaren", however, the Improvement can't be obtained. The reason for no improvement is that the bending moment induced by the movement of "suikaren" in waves is dominant and the mooring method proposed does not have an effect in reduction of the moment component. In order to reduce the bending moment acting on the oyster raft, it is necessary to make influence of "suikaren" small.
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