Performance characterization and modeling of an oscillating surge wave energy converter

Ahmed, Alaa; Yang, Lisheng; Huang, Jianuo; Shalaby, Ahmed; Datla, Raju; Zuo, Lei; Hajj, Muhammad

doi:10.1007/s11071-023-09248-2

Performance characterization and modeling of an oscillating surge wave energy converter

Journal Article · Fri Jan 26 00:00:00 EST 2024 · Nonlinear Dynamics

DOI:https://doi.org/10.1007/s11071-023-09248-2· OSTI ID:2282917

; Yang, Lisheng; Huang, Jianuo; Shalaby, Ahmed; Datla, Raju; Zuo, Lei; Hajj, Muhammad

Abstract

Testing wave energy converters in the ocean could be expensive and complex, which necessitates the use of numerical modeling. However, accurately modeling the response of wave energy converters with high-fidelity simulations can be computationally intensive in the design stage where different configurations must be considered. Reduced-order models based on simplified equations of motion can be very useful in the design, optimization, or control of wave energy converters. Given the complex dynamics of wave energy converters, accurate representation, and evaluation of relative contributions by different forces are required. This effort is concerned with a performance characterization of the hydrodynamic response of an oscillating surge wave energy converter that is based on a reduced-order model. A state-space model is used to represent the radiation damping term. Morison’s representation of unsteady forces is used to account for the nonlinear damping. Wave tank tests are performed to validate simulations. A free response simulation is used to determine the coefficients of the state-space model. Torque-forced simulations are used to identify the coefficients of the nonlinear damping term for different amplitudes and wave frequencies. The impact of varying these coefficients on the response is investigated. An assessment of the capability of the model in predicting the hydrodynamic response under irregular forcing is performed. The results show that the maximum error is 3% when compared with high-fidelity simulations. It is determined that the nonlinear damping is proportional to the torque amplitude and its effects are more pronounced as the amplitude of the flap oscillations increases.

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Research Organization:: Stevens Institute of Technology, Hoboken, NJ (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0008953

OSTI ID:: 2282917

Alternate ID(s):: OSTI ID: 2403433

Journal Information:: Nonlinear Dynamics, Journal Name: Nonlinear Dynamics Journal Issue: 6 Vol. 112; ISSN 0924-090X

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Netherlands

Language:: English

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