Applied Mathematics and Mechanics (English Edition) ›› 2022, Vol. 43 ›› Issue (7): 1081-1108.doi: https://doi.org/10.1007/s10483-022-2864-6

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Recent advances in wave energy converters based on nonlinear stiffness mechanisms

Xiantao ZHANG1, Haicheng ZHANG2, Xiao ZHOU2, Ze SUN2,3   

  1. 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;
    3. China Ship Scientific Research Center, Wuxi 214082, Jiangsu Province, China
  • Received:2021-11-08 Revised:2022-01-26 Online:2022-07-01 Published:2022-06-30
  • Contact: Haicheng ZHANG, E-mail: zhanghc@hnu.edu.cn
  • Supported by:
    the State Key Laboratory of Coastal and Offshore Engineering of China (No. LP2019), the 2020 Research Program of Sanya Yazhou Bay Science and Technology City of China (No. SKJC-2020-01-006), the Hainan Provincial Natural Science Foundation of China (No. 520QN290), and the High-tech Ship Research Projects Sponsored by MIIT of China (No.[2019]357)

Abstract: Wave energy is one of the most abundant renewable clean energy sources, and has been widely studied because of its advantages of continuity and low seasonal variation. However, its low capture efficiency and narrow capture frequency bandwidth are still technical bottlenecks that restrict the commercial application of wave energy converters (WECs). In recent years, using a nonlinear stiffness mechanism (NSM) for passive control has provided a new way to solve these technical bottlenecks. This literature review focuses on the research performed on the use of nonlinear mechanisms in wave energy device utilization, including the conceptual design of a mechanism, hydrodynamic models, dynamic characteristics, response mechanisms, and some examples of experimental verification. Finally, future research directions are discussed and recommended.

Key words: wave energy, efficiency, nonlinear stiffness, hydrodynamics, bistable

2010 MSC Number: 

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