Journal of Jishou University(Natural Sciences Edition) ›› 2024, Vol. 45 ›› Issue (2): 40-44.DOI: 10.13438/j.cnki.jdzk.2024.02.006

• Ocean • Previous Articles     Next Articles

Point-Absorbing Wave Energy Converter Based on Nonlinear Pendulum Stiffness Mechanism

HUANG Xiuyuan,XIANG Rengjin,ZHOU Xiao,JIN Huaqing,HUANG Yuhang,SONG Xinhua,BI Rengui   

  1. (1.College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;3.Zhangjiajie Institute of Aeronautical Engineering,Zhangjiajie 427000,Hunan China;4.Research Center of Lightweight and Intelligence for Advanced Equipment,Jishou University,Jishou 416000,Hunan China)
  • Online:2024-03-25 Published:2024-04-16

Abstract: In order to achieve stable capture of ocean low-frequency wave energy,a point-absorbing wave energy converter based on a nonlinear pendulum stiffness mechanism was designed.A compact pendulum stiffening device was constructed through addition of simple tensile elastic elements between the pendulums.The force analysis of the nonlinear stiffness structure was carried out the time domain dynamic model of the nonlinear wave energy converter was established based on the Cummins equation,and the wave energy conversion characteristics of the point absorption wave energy converter under the action of regular waves were analyzed.Numerical simulation shows that through introduction of an appropriate nonlinear pendulum stiffness mechanism,the motion response of the system under wave excitation can be improved,and the frequency corresponding to the peak motion response of the system under wave excitation can be reduced,thereby improving the system's capture efficiency of low-frequency energy.

Key words: stiffness, wave energy converter, nonlinear, frequency, capture efficiency

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