Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/1357
Título: Frequency and Stochastic Domain Models for Two Geometries of the IPS Wave Power Buoy
Autor: Cândido, J.
Justino, Paulo Alexandre
Henriques, J.C.C.
Palavras-chave: Frequency-domain model
Stochastic model
IPS buoy
Non-axisymmectric geometry
Data: 2011
Citação: Cândido, J.J.; Justino, P.A.P.; Henriques, J.C.C. Frequency and Stochastic Domain Models for Two Geometries of the IPS Wave Power Buoy. In: EWTEC' 2011 Proceedings of 9th European Wave and Tidal Energy Conference, UK (Southampton), Setembro, 2011, 10p.
Resumo: Frequency-domain analysis is applied to a geometry of the original IPS buoy device concept. The analysis is particularly useful in the early development stages to establish the response of power take-off mechanism characteristic parameters to different frequencies of the wave spectrum. Optimal mechanical damping and spring coefficients are computed for some parameters restrictions. Absorbed power, capture width and other variables, such as relative displacement,are computed for regular waves and these optimal mechanical coefficients. A stochastic model is developed in order to evaluate the IPS buoy behaviour for irregular waves’ conditions. This allows defining probability density functions for parameters that characterize the device’s behaviour. Assuming that the overall system behaviour is linear and that the surface elevation for irregular waves may be regarded as a stochastic process with a Gaussian probability density function, the variables that define the system behaviour, such as bodies’ displacements and velocities, will also hold a Gaussian probability density function. The average power extraction is computed for different sea state conditions.Aiming to enhance the device’s hydrodynamic performance, a new non-axisymmetric IPS geometry is conceived. Using the stochastic modelling approach, the device’s behaviour is studied for several wave directions and compared to the axisymmetric configuration’s behaviour.
URI: http://hdl.handle.net/10400.9/1357
Aparece nas colecções:EOC - Comunicações em encontros científicos internacionais

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