Analysis of wave-drift damping of a VLFS with shallow draft |
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| Institution: | 1. China Ship Scientific Research Center, No.222 East Shanshui Road, Binhu District, Wuxi, 214082, China;2. National Laboratory of Naval Architecture & Ocean Engineering, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 20024, China;1. China Ship Scientific Research Center, No.222 East Shanshui Road, Binhu District, Wuxi, 214082, China;2. Jiangsu University of Science and Technology, No.2 Mengxi Road, Zhenjiang, 212003, China;3. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian, 116024, China;1. School of Naval Architecture and Marine Engineering, National Technical University of Athens, Iroon Polytechniou St. 9, Zografou Campus, 15773 Athens, Greece;2. Department of Mechanics, School of Applied Mathematical and Physical Science, National Technical University of Athens, Iroon Polytechniou St. 9, Zografou Campus, 15773 Athens, Greece |
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| Abstract: | Numerical analysis of the wave-drift damping of VLFS as a floating elastic plate is presented. The source distribution method is used to analyze the drift force of the floating plate advancing with low-forward speed in waves. In the analysis, the shallow-draft assumption of the floating body is utilized; this assumption leads to the neglect of the steady disturbance field, which simplifies the analysis to a great extent. The consideration of the elastic deformation is made by modal expansion of the response, and the unit-amplitude radiation potentials are computed for each mode. The numerical results have confirmed that the wave-drift damping will have appreciable magnitude at the frequency region where the slow-drift oscillations are dominant. The formula for the wave-drift damping proposed by Aranha (J Fluid Mech 1996;313:39–54) has been compared with the present numerical results, but fundamental disagreement has been observed as reported by Finne and Grue (J Fluid Mech 1998;357:289–320). |
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