Reflection and transmission of regular water waves by a thin,floating plate |
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| Institution: | 1. Centre for Ocean Engineering Science and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia;2. School of Mathematical Sciences, University of Adelaide, Adelaide, SA, Australia;3. Department of Mechanical Engineering, University of Melbourne, Melbourne, VIC, Australia;4. School of Mathematical and Physical Sciences, University of Newcastle, Callaghan, NSW, Australia;5. Department of Infrastructure Engineering, University of Melbourne, Melbourne, VIC, Australia;1. School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK;2. Department of Civil and Environmental Engineering, National University of Singapore, Kent Ridge, Singapore 117576, Singapore;3. Department of Civil, Environmental & Geomatic Engineering, University College London, Gower Street, London WC1E 6BT, UK |
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| Abstract: | Measurements of the wave fields reflected and transmitted by a thin floating plastic plate are reported for regular incident waves over a range of incident periods (producing wavelengths comparable to the plate length) and steepnesses (ranging from mild to storm-like). Two different plastics are tested, with different densities and mechanical properties, and three different configurations are tested. The configurations include freely floating plates, loosely moored plates (to restrict drift), and plates with edge barriers (to restrict waves overwashing the plates). The wave fields reflected and transmitted by plates without barriers are shown to become irregular, as the incident waves become steeper, particularly for the denser plastic and the moored plate. Further, the proportion of energy transmitted by the plates without barriers is shown to decrease as the incident wave becomes steeper, and this is related to wave energy dissipation. |
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| Keywords: | Ocean waves Thin plate Energy dissipation |
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