首页|Negative Stiffness Mechanism on An Asymmetric Wave Energy Converter by Using A Weakly Nonlinear Potential Model

Negative Stiffness Mechanism on An Asymmetric Wave Energy Converter by Using A Weakly Nonlinear Potential Model

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Salter's duck,an asymmetrical wave energy converter(WEC)device,showed high efficiency in extracting energy from 2D regular waves in the past;yet,challenges remain for fluctuating wave conditions.These can potentially be addressed by adopting a negative stiffness mechanism(NSM)in WEC devices to enhance system efficiency,even in highly nonlinear and steep 3D waves.A weakly nonlinear model was developed which incorporated a nonlinear restoring moment and NSM into the linear formulations and was applied to an asymmetric WEC using a time domain potential flow model.The model was initially validated by comparing it with published experimental and numerical computational fluid dynamics results.The current results were in good agreement with the published results.It was found that the energy extraction increased in the range of 6%to 17%during the evaluation of the effectiveness of the NSM in regular waves.Under irregular wave conditions,specifically at the design wave conditions for the selected test site,the energy extraction increased by 2.4%,with annual energy production increments of approximately 0.8 MWh.The findings highlight the potential of NSM in enhancing the performance of asymmetric WEC devices,indi-cating more efficient energy extraction under various wave conditions.

asymmetric wave energy converternegative stiffness mechanismweakly nonlinearpotential flowpower

Sunny Kumar POGULURI、Dongeun KIM、Yoon Hyeok BAE

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Department of Ocean Engineering,IIT Madras,Chennai,India

Multidisciplinary Graduate School Program for Wind Energy,Jeju National University,Jeju,Republic of Korea

Mechanical and System Design Engineering,Hongik University,Seoul,Republic of Korea

Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of EducationHongik University Research Fund(2024)

2022R1I1A1A01069442

2024

10.1007/s13344-024-0054-6

中国海洋工程(英文版)
中国海洋学会

中国海洋工程(英文版)

CSTPCDEI
影响因子：0.338
ISSN：0890-5487
年,卷(期)：2024.38(4)