Multi-stable mechanism of an oscillating-body wave energy converter

Li, Liang and Zhang, Xiantao and Yuan, Zhiming and Gao, Yan (2020) Multi-stable mechanism of an oscillating-body wave energy converter. IEEE Transactions on Sustainable Energy, 11 (1). pp. 500-508. ISSN 1949-3037 (https://doi.org/10.1109/TSTE.2019.2896991)

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Abstract

The present research aims to utilize the multi-stable mechanism to increase the energy conversion of the oscillating-body wave energy converter (WEC). Considering that a majority of WEC concepts are linear and single-stable, a nonlinear spring-damper model is proposed to achieve the multi-stable mechanism. The system is either monostable or bistable depending on the initial condition of the springs. The energy conversion of a heaving point-absorber with the nonlinear spring-damper model is investigated in the present research. Firstly, a state-space dynamic model of the heaving point-absorber is developed. Then the energy conversion at both the monostable mode and the bistable mode is simulated. The present research also illustrates the response feature at the two stable modes. It is found the nonlinear point-absorber behaves like a linear system in the monostable mode. The energy conversion is just increased slightly. Nevertheless, the energy absorption is increased substantially in the bistable mode. It is found that the velocity phase is adjusted in the bistable mode, leading to the enhancement of the energy conversion.

ORCID iDs

Li, Liang ORCID logoORCID: https://orcid.org/0000-0002-8528-3171, Zhang, Xiantao, Yuan, Zhiming ORCID logoORCID: https://orcid.org/0000-0001-9908-1813 and Gao, Yan;
  • Item type:Article
    ID code:68742
    Dates:
    Date
    Event
    30 January 2020
    Published
    1 February 2019
    Published Online
    30 January 2019
    Accepted
    Notes:© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:04 Jul 2019 13:57
    Last modified:24 Sep 2024 08:19
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/68742
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