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김태인,최한규,최용목 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-
This reasearch is to clarify the differences of predicted wave forces on most common cylindrical structural members of offshore structures among various methods for dot-ermining either force coefficients or wave kinematics. For this purpose, computer pro-grams were made to compute both kinematics from thrpe wave theories (Small-am-plitude wave theory. Stokes finite-amplitude wave theory and Stream-function wave theory) and force coefficients from three methods (Least-Square Method, Fourier Decom-position Method and Maximum Value Method) Wave forces were measured in a two-di-mensional wave flume experiment for a horizontal circular cylinder in which the range of the Keulegan-Carpenter number was 6~ 32. and the range of the Reynolds number was 5.4×10_^(3)2.9×10_^(4). It is found that the Maximum Value Method gives higher values of force coefficients than the Least-square Method does, while the differences between the Least-square Method and the Fourier Decomposition Method are negligible. It is also found that the nonlinear wave theories give higher values of force coefficients than the linear wave theory does, while the differences among force coefficients determined by the Stokes wave theory and the Stream-function wave theory are negligible.
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