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Numerical and experimental study on seakeeping performance of a SWATH vehicle in head waves |
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| Institution: | 1. School of Automation, Harbin University of Science and Technology, Harbin, 150080, China;2. College of Automation, Harbin Engineering University, Harbin, 150001, China;1. Dept. of Maritime Sciences, Kobe University, 5-1-1, Fukae Minami Machi, Higashinada-ku, Kobe 658-0022, Japan;2. Centre for Autonomous Marine Operations and Systems, Norwegian University of Science and Technology, Norway;3. Wind Energy Institute of Tokyo, Inc. (Japan Agency for Marine-Earth Science and Technology), Japan;4. Faculty of Engineering, University of Rijeka, Croatia;5. Dept. of Naval Architecture and Ocean Engineering, Osaka University, Japan;6. Imabari Shipbuilding Co., Ltd., Japan;1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, China;2. China Marine Develop and Research Center, Beijing, 100032, China;1. Naval Architecture and Marine Engineering Unit, DITEN, University of Genoa, Italy;2. Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, VA, USA |
| Abstract: | The seakeeping characteristics of a Small Waterplane Area Twin Hull (SWATH) vehicle equipped with fixed stabilizing fins was investigated by experimental and numerical methods The calculation methods range from viscous CFD simulation based on an unsteady RANS approach to Boundary Element Method (BEM) based on Three Dimensional Translating-pulsating Source Green Function (3DTP). Responses of ship motions in head regular waves and nonlinear effects on motion responses with increasing wave amplitude were analyzed. Numerical simulations have been validated by comparisons with experimental tests. The results indicate that the heave and pitch transfer functions depict two peaks with the increase of wave length. Comparisons amongst experimental data and different numerical calculations illustrate that the RANS method predicts ship motions with higher accuracy and allows the detection of nonlinear effects. The heave and pitch transfer functions see a downward trend with the increasing wave amplitude in the resonant zone at low speed. |
| Keywords: | SWATH URANS Three dimensional translating-pulsating green function Seakeeping |
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