Modelling of the buckling of a diaphragm–spine structure for a wave energy converter

Journal article


Collins, Keri M., Meng, Maozhou, Le, Huirong, Greaves, Deborah M. and Bellamy, Neil 2017. Modelling of the buckling of a diaphragm–spine structure for a wave energy converter. Materials & Design. https://doi.org/10.1016/j.matdes.2017.01.041
AuthorsCollins, Keri M., Meng, Maozhou, Le, Huirong, Greaves, Deborah M. and Bellamy, Neil
Abstract

A wide range of wave energy converter (WEC) designs exists, and the SeaWave WEC uses an unstable buckled spine mode of operation. The SeaWave consists of a hose and buckled spine-diaphragm, which pumps air along the device under wave action. A physical model and finite element analysis (FEA) is compared to a previous theoretical model in this paper. The FE model was developed in ABAQUS 6.14 using shell, solid and contact elements and the analysis was done with a quasi-static approach to reduce the computational costs. The physical model was a scale version of the novel arrangement of the spine and diaphragm made from steel, polycarbonate and latex rubber. Geometry of the deformed device was investigated results showed an increase in transverse and longitudinal curvature as the compression rate increased. The FEA tended to overestimate the bending stiffness of the model, and hence the transverse curvature, because certain behaviours of the physical model were not captured. The force required to switch from one buckled state to another was measured both in the physical and FEA models and the potential energy storage was estimated to be 0.5 J/m of device at a compression rate of 0.1%.

KeywordsWave energy converter; Design; Finite element analysis; Deformable structures
Year2017
JournalMaterials & Design
PublisherElsevier
ISSN02641275
Digital Object Identifier (DOI)https://doi.org/10.1016/j.matdes.2017.01.041
Web address (URL)http://hdl.handle.net/10545/621845
hdl:10545/621845
Publication dates15 Jan 2017
Publication process dates
Deposited08 Sep 2017, 11:50
Accepted13 Jan 2017
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ContributorsPlymouth University, University of Derby and Sea Energy Associates Ltd.
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