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|Title: ||Wave Forces on Multiple Large Surface-Piercing Cylinders Mounted on Conical Shoals|
|Authors: ||Sung-Shan Hsiao;Chih-Chung Wen;Chun-Ming Chang;Chao-Lung Ting|
|Contributors: ||NTOU:Department of Harbor and River Engineering|
|Keywords: ||Dual reciprocity boundary element method;wave force;modified mild-slope equation;large structure|
|Issue Date: ||2011-10-20T08:13:48Z
|Publisher: ||Proceedings of the 20th International Offshore and Polar Engineering Conference|
|Abstract: ||abstract:In this investigation, we considered the wave force on multiple large surface-piercing cylinders mounted on a shoal. Instead of conventional approaches, e.g. Helmholtz equation for constant water depth or ignoring rapid undulations of the bottom the modified mild-slope equation (MMSE) was adopted to calculate the wave potential and the linear Bernoulli equation was used to estimate the wave force. About the numerical method, we employed the dual reciprocity boundary element method (DRBEM) to reduce the corresponding complicated domain integration. The numerical results were compared with the analytic solutions of Liu and Lin (2007) and MacCamy and Fuchs (1954), respectively. Comparisons between numerical results and analytic solution showed excellent agreements. We used two types of shoal with different slopes as numerical cases in this study. We also carried out numerical experiments for incident waves with normal and 45-degree angles. We found that when the length of incident wave is twice the spacing between columns, larger wave height occurs at downstream columns, because of interactions between waves and columns. The wave force oscillates in sync with incident wave.|
|Appears in Collections:||[河海工程學系] 演講及研討會|
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