Analytical linear modelization of a buckled undulating membrane tidal energy converter

Type Article
Date 2019-01
Language English
Author(s) Trasch Martin1, 2, 3, Deporte Astrid1, Delacroix Sylvain1, Germain GregoryORCID2, Drevet Jean-Baptiste1
Affiliation(s) 1 : Eel Energy, 42 Rue Monge, F-75005 Paris, France.
2 : IFREMER, Marine Struct Lab, 150 Quai Gambetta, F-62200 Boulogne Sur Mer, France.
3 : ADEME, 20 Ave Gresille, F-49004 Angers, France.
Source Renewable Energy (0960-1481) (Pergamon-elsevier Science Ltd), 2019-01 , Vol. 130 , P. 245-255
DOI 10.1016/j.renene.2018.06.049
WOS© Times Cited 1
Keyword(s) Marine renewable energy, Tidal energy converter, Power take-off, Fluid-structure interaction, Slender body theory

This paper presents an analytical linear model developed to study the behaviour of a buckled membrane tidal energy converter. The Euler beam theory and the elongated body theory are used for the fluid structure interaction formulation. The effect of electromechanical converters used to convert the undulating motion into electrical energy is reproduced by adding a term equivalent to viscous material damping.

The influence of compression force, flaps and hanging conditions is studied, as well as the effects of simulated power take-off through internal damping. The system's behaviour is characterized by undulating mode, critical flow velocity, motion frequency and amplitude.

The model shows good agreement in terms of frequency and satisfactory results for the amplitude compared to experimental data. The linear assumptions were validated on fluid and structure models as a good start for a first analytical model describing the system's physic. The obtained results confirmed the benefits of initial stress and optimized damping to the tidal converter for energy harnessing.

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