Mixed time-frequency-domain method for nonlinear hybrid floating breakwater-WEC

被引：1
作者：
Li, Pengcheng [1 ]
Zhang, Haiheng [1 ,2 ,3 ]
Zhao, Xin [1 ,4 ]
Jin, Huaqing [1 ]
Ding, Jun [4 ]
Xu, Daolin [1 ,5 ]
机构：
[1] Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Peoples R China
[2] Hunan Univ, Greater Bay Area Inst Innovat, Guangzhou 511300, Peoples R China
[3] Hunan Univ, Wuxi Intelligent Control Res Inst, Wuxi 214082, Peoples R China
[4] China Ship Sci Res Ctr, Wuxi 214082, Peoples R China
[5] Taihu Lab Deepsea Technol Sci, Wuxi 214082, Peoples R China
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2025年 / 228卷
基金：
中国国家自然科学基金;
关键词：
Wave energy; Wave attenuation; Bistable; Nonlinear dynamics; Wave-structure interaction; Low frequency; WAVE ENERGY CONVERTER; HYDRODYNAMIC PERFORMANCE; VIBRATION; POWER; ENHANCEMENT; DIFFRACTION; EFFICIENCY; RADIATION;
D O I：
10.1016/j.ymssp.2025.112426
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Ocean waves represent a vast and renewable resource that is prevalent across the globe. However, the relentless erosion of marine equipment and coastal structures poses an ongoing challenge to safety. The integration of a floating breakwater with a wave energy converter (FB-WEC) offers a dual solution that addresses both wave protection and energy harnessing. The attenuation of lowfrequency ocean waves and their subsequent energy capture is a critical issue within the field of ocean engineering. The introduction of additional nonlinear stiffness can significantly enhance the low-frequency response of FB-WECs without the need to enlarge their physical dimensions. To address the complex nonlinear fluid-structure interactions inherent in nonlinear FB-WECs, a hybrid time-frequency domain approach has been developed. This method is based on the concept of harmonic decomposition and enables the rapid computation of the FB-WEC's motion response while facilitating the concurrent acquisition of wave data. An innovative umbrella-type bistable mechanism (U-BM) has been conceived and implemented in the FB-WEC design. A prototype has been fabricated, and its performance was tested through wave flume experiments. The results of these experiments have validated the numerical simulations, confirming that the UBM FB-WEC is proficient at responding to low-amplitude wave excitations. Under conditions of comparable wave height, the U-BM FB-WEC consistently delivers over 50% more power output in the low-frequency band compared to its linear counterpart. This advancement marks a significant stride in the field of wave energy conversion, promising more efficient energy capture and a more sustainable future for marine environments and coastal communities.
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页数：23
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