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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51987

Title: Analysis of the dynamics of a floating body with thin skirts by using the dual boundary element method
Authors: Wen-Kai Weng
Tru Duc Tran
Ruey Syan Shih
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: moored floating structure
rigid skirts
numerical simu-lation
drag coefficient
dual boundary element method
Date: 2015-10
Issue Date: 2019-01-10T07:22:28Z
Publisher: Journal of Marine Science and Technology
Abstract: Abstract: In this study, a numerical simulation of the dynamic be-havior of a novel floating structure with rigid skirts was con-ducted using the dual boundary element method. The thick-ness of the skirts mounted beneath the structure was negligible. A theoretical analysis was derived from linear wave theory, and a nonlinear drag term was added in the motion equation of the floating structure for improving the solution. This study investigated the effects of double vertical skirts on a free floating structure and verified the validity of the analysis by comparing the result with those of Gesraha (2006). The results showed that adding double vertical skirts increases the overall mass of the structure, thus enabling the floating structure to resist wave forces for longer periods. The main purpose of this paper was to investigate the in-fluences of the angles of the skirt attachment and the nonlinear drag term, on the moored floating structure. This study fo-cused on the changes in the structure’s motion in each mode, reflection and transmission coefficients, energy loss induced by the nonlinear drag term, and various angles of skirt at-tachment. The analytical results agreed with the experimental data. Involving a nonlinear drag term in the analysis yielded superior results, particularly when the structure approached the natural period in the three modes of oscillation.
Relation: 23(5) pp.598-607
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51987
Appears in Collections:[河海工程學系] 期刊論文

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