Generation of the Irregular Wave Specified by the Spectrum of the Wave Envelope and Some Results of a Model Test

概要

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This paper describes the generation of the irregular wave specified by the spectrum of the wave envelope using a wave maker in a test basin. An effective generation algorithm for the irregular wave specified by the wave envelope spectrum is proposed. The design for mooring systems of a vessel in a port as well as a floating offshore structure is important because the long period wave happens to cause the break of mooring lines in spite of relatively calm ocean conditions. In very large floating structures, such as the mega-float case, especially, this problem will become a severe one due to no past experience in real design. The long period wave can be induced by the irregular wave specified by the spectrum of the wave envelope. The proposed algorithm is verified by the computer simulation. The experiment results using a pontoon model are also presented.