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Investigation of vertical slamming on point absorbers De Backer, G.; Vantorre, M.; Victor, S.; De Rouck, J.; Beels, C. (2008). Investigation of vertical slamming on point absorbers, in: Proceedings of the 27th International Conference on Offschore Mechanics and Arctic Engineering (OMAE 2008), Estoril, Portugal, 15-20 June, 2008. pp. [1-9] In: (2008). Proceedings of the 27th International Conference on Offschore Mechanics and Arctic Engineering (OMAE 2008), Estoril, Portugal, 15-20 June, 2008. American Society of Mechanical Engineers: New York. ISBN 978-0-7918-4823-4. 1 cd-rom pp., meer

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Beschikbaar in	Auteurs
VLIZ: Open access 141424 [ download pdf ]
Documenttype: Congresbijdrage

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Trefwoord

Energy > Wave energy

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Auteurs		Top
De Backer, G. Vantorre, M., meer Victor, S.	De Rouck, J. Beels, C.

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Abstract

This paper focuses on the impact of vertical slamming on floating point absorber systems and the associated pressures that might be expected when these phenomena occur. In a first part it will be shown how the occurrence probability of slamming can be reduced by implementing a slamming restriction, i.e. by controlling the motion of the point absorber. The impact of these slamming restrictions on power absorption will be discussed. Secondly an investigation is made of the pressures that occur when the buoys are subject to vertical bottom slamming. Analytical results are presented, which give a pressure prediction of an impacting body with conical and hemispherical shape, using Wagner theory. Laboratory experiments have been carried out at Ghent University. Impact pressures were measured during drop tests with both hemispherical and conical buoy shapes. These pressures were measured by ICP pressure sensors with a range up to 345 kPa with small membrane and very high resonance frequency (> 250 kHz). Analytical and physical results are compared and conclusions are drawn.

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