各種造波装置の性能比較

概要

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Wavemakers are an important tool for ocean engigeering research. In experimental tanks at university and company, there are various wavemakers. Flap, piston and plunger types are more popular among them. Flap and piston type wavemaker thoery is well known, plunger type wavemaker is a little bit complicated mathematically. Such problems, as which type is the most efficient under certain water depth, or which type is the most suitable for large amplitude wave, have been a few studied. We studied on characteristics of flap, piston and plunger type wavemakers under same water depth with some assumptions. According to comparison of the maximum force needed to drive these wavemakers to make waves with same amplitude, the most efficient type could be found. On the other hand, by investigating the amplitude ratio of radiation wave to displacement of flap, piston and plunger, the most suitable type could be found for large amplitude wave. Furthermore we discussed the no-added mass wavemaker and the no-progressive wavemaker. It was known hat plunger type wavemaker are more efficient under deep water and flap type is the most efficient under shallow water. Piston type is more suitable to generate a large amplitude wave. No-added mass wavemaker and no-progressive wave wavemaker are interest types but it is difficult to make them realize.
社団法人日本船舶海洋工学会の論文
1988-06-30