Abstract
In this paper, the fluctuation of water surface has been recovered from subsurface dynamic pressures exerted on a small vertical cylinder of a tripod structure and it finds that the wave heights can be estimated accurately from the pressures measured at θ = 180°. Seven pressure transducers were mounted around the cylinder to get the circumference distribution of the dynamic pressures. The time histories of the water surface fluctuations and the concurrent dynamic pressures upon the cylinder have been analyzed in frequency domain. A part of the linear diffraction theory of MacCamy & Fuchs has been applied to analyze the experimental data. Additionally, the empirical factor, which is the ratio of the measured and recovered wave height, is presented.
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