長周期運動する浮体に加わる流体力に関する実験的研究

概要

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Hydrodynamic forces acting on bodies with rectangular and circular sections are measured and are found to exist non-linear forces. Radiation forces acting on bodies forced to sway in simple and in combined two harmonic oscillations in low and high frequencies are measured. Hydrodynamic coefficients obtained from the forced sway combined two harmonic oscillations differ from those of the simple harmonics. Wave diffraction forces acting on bodies oscillated in low frequencies are also measured and are found to be different from those acting on still bodies. These differences are considered as non-linear hydrodynamic forces and have good correlations to the increases in the modified Keulegan-Carpenter number proposed in this paper for the case of combined oscillations.
社団法人日本船舶海洋工学会の論文