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

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    Authors
    Collins, Keri M.
    Meng, Maozhou
    Le, Huirong
    Greaves, Deborah M.
    Bellamy, Neil
    Affiliation
    Plymouth University
    University of Derby
    Sea Energy Associates Ltd.
    Issue Date
    2017-01-15
    
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    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%.
    Citation
    Collins, K. M. et al (2017) 'Modelling of the buckling of a diaphragm–spine structure for a wave energy converter', Materials & Design, 119:159
    Publisher
    Elsevier
    Journal
    Materials & Design
    URI
    http://hdl.handle.net/10545/621845
    DOI
    10.1016/j.matdes.2017.01.041
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S0264127517300588
    Type
    Article
    Language
    en
    ISSN
    02641275
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.matdes.2017.01.041
    Scopus Count
    Collections
    Department of Mechanical Engineering & the Built Environment

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